[Unit 01 - 학평 ANALYSIS]

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[고2] 올림포스 전국연합학력평가 기출문제집 영어독해 – 지문정리 (문제 제작용)

Dear parents, Regular attendance at school is essential in maximizing student potential. Recently, we've become concerned about the number of unapproved absences across all grades. I would like to further clarify that your role as a parent is to approve any school absence. Parents must provide an explanation for absences to the school within 7 days from the first day of any period of absence. Where an explanation has not been received within the 7-day time frame, the school will record the absence as unjustified on the student's record. Please ensure that you go to the parent portal site and register the reason any time your child is absent. Please approve all absences, so that your child will not be at a disadvantage. Many thanks for your cooperation. Sincerely, Natalie Brown, Vice Principal

[Unit 01 – 01]

To whom it may concern, I would like to draw your attention to a problem that frequently occurs with the No. 35 buses. There is a bus stop about halfway along Fenny Road, at which the No. 35 buses are supposed to stop. It would appear, however, that some of your drivers are either unaware of this bus stop or for some reason choose to ignore it, driving past even though the buses are not full. I would be grateful if you could remind your drivers that this bus stop exists and that they should be prepared to stop at it. I look forward to seeing an improvement in this service soon. Yours faithfully, John Williams

[Unit 01 – 02]

It was a pleasure meeting you at your gallery last week. I appreciate your effort to select and exhibit diverse artwork. As I mentioned, I greatly admire Robert D. Parker's paintings, which emphasize the beauty of nature. Over the past few days, I have been researching and learning about Robert D. Parker's online viewing room through your gallery's website. I'm especially interested in purchasing the painting that depicts the horizon, titled Sunrise. I would like to know if the piece is still available for purchase. It would be a great pleasure to house this wonderful piece of art. I look forward to your reply to this inquiry.

[Unit 01 – 03]

Dear local business owners, My name is Carol Williams president of the student council at Yellowstone High School. We are hosting our annual quiz night on March 30 and plan to give prizes to the winning team. However, this event won't be possible without the support of local business who provide valuable products and services. Would you be willing to donate a gift certificate that we can use as a prize? We would be greatful for any amount on the certificate. In exchange for your generosity, we would place an advertisement for your business on our answer sheets. Thank you for taking time to read this letter and consider our request. If you'd like to donate or need more information, please call or email me. I look forward to hearing from you soon. Carol Williams

[Unit 01 – 04]

Dear Customer Service, I am writing in regard to my magazine subscription. Currently, I have just over a year to go on my subscription to Economy Tomorrow and would like to continue my subscription as I have enjoyed the magazine for many years. Unfortunately, due to my bad eyesight, I have trouble reading your magazine. My doctor has told me that I need to look for large print magazines and books. I'd like to know whether there's a large print version of your magazine. Please contact me if this is something you offer. Thank you for your time. I look forward to hearing from you soon. Sincerely, Martin Gray

[Unit 01 – 05]

Dear Ms. Stevens, My name is Peter Watson, and I'm the manager of the Springton Library. Our storytelling program has been so well‑attended that we are planning to expand the program to 6 days each week. This means that we need to recruit more volunteers to read to the children. People still talk about the week you filled in for us when one of our volunteers couldn't come. You really brought those stories to life! So, would you be willing to read to the preschoolers for an hour, from 10 to 11 a.m. every Friday? I hope you will take this opportunity to let more children hear your voice. We are looking forward to your positive reply. Best regards, Peter Watson

[Unit 01 – 06]

As I explained on the telephone, I don't want to take my two children by myself on a train trip to visit my parents in Springfield this Saturday since it is the same day the Riverside Warriors will play the Greenville Trojans in the National Soccer Championship. I would really appreciate it, therefore, if you could change my tickets to the following weekend (April 23). I fully appreciate that the original, special-offer ticket was non-exchangeable, but I did not know about the soccer match when I booked the tickets and I would be really grateful if you could do this for me. Thank you in advance.

[Unit 01 – 07]

To whom it may concern, I am a parent of a high school student who takes the 145 bus to commute to Clarkson High School. This is the only public transport available from our area and is used by many students. Recently, I heard that the city council is planning to discontinue this service. My husband and I start work early in the morning and this makes it impossible for us to drop our son off at school. It would take him nearly an hour to walk to school and there is a lot of traffic in the morning, so I do not consider it safe to bike. This matter will place many families, including ours, under a lot of stress. As a resident of Sunnyville, I think such a plan is unacceptable. I urge the council to listen to the concerns of the community. Sincerely, Lucy Jackson

[Unit 01 – 08]

Dear parents and students of Douglas School, As you know, our school was built over 150 years ago. While we are proud of our school's history, the facilities are not exactly what they should be for modern schooling. Thanks to a generous donation to the school foundation, we will be able to start renovating those parts of our campus that have become outdated. We hope this will help provide our students with the best education possible. I'm writing to inform you that the auditorium will be the first building closed for repairs. Students will not be able to use the auditorium for about one month while the repairs are taking place. We hope that you will understand how this brief inconvenience will encourage community-wide benefits for years to come. Sincerely, Vice Principal Kyla Andrews

[Unit 01 – 09]

My name is Anthony Thompson and I am writing on behalf of the residents' association. Our recycling program has been working well thanks to your participation. However, a problem has recently occurred that needs your attention. Because there is no given day for recycling, residents are putting their recycling out at any time. This makes the recycling area messy, which requires extra labor and cost. To deal with this problem, the residents' association has decided on a day to recycle. I would like to let you know that you can put out your recycling on Wednesdays only. I am sure it will make our apartment complex look much more pleasant. Thank you in advance for your cooperation.

[Unit 01 – 10]

To the Principal of Gullard High School, My name is Nancy Watson, and I am the captain of the student dance club at Gullard High School. We are one of the biggest faces of the school, winning a lot of awards and trophies. However, the school isn't allowing our club to practice on the school field because a lot of teachers worry that we are going to mess up the field. This is causing us to lose practice time and ultimately results in creating a bad high school experience for us. We promise to use the space respectfully. Therefore, I'm asking you to allow us to use the school field for our dance practice. I would be grateful if you reconsider your decision. Thank you very much. Sincerely, Nancy Watson

[Unit 01 – 11]

Dear Residents, We truly value and appreciate all of our residents, including those with pets. We believe that allowing people to live with their pets enriches their lives. While we encourage you to enjoy your pets, we also want to ensure that you do not do so at the expense of your neighbors or your community. We have received reports that some residents have been disturbed by noise from dogs barking. Excessive barking by dogs disrupts everyone within hearing, particularly those who are elderly or sick or who have small children. We kindly ask that you keep your dogs' noise levels to a minimum. Thank you for your assistance with this. Regards, Conway Forest Apartments Management Office

[Unit 01 – 12]

Dear Mr. Stanton: We at the Future Music School have been providing music education to talented children for 10 years. We hold an annual festival to give our students a chance to share their music with the community and we always invite a famous musician to perform in the opening event. Your reputation as a world‒class violinist precedes you and the students consider you the musician who has influenced them the most. That's why we want to ask you to perform at the opening event of the festival. It would be an honor for them to watch one of the most famous violinists of all time play at the show. It would make the festival more colorful and splendid. We look forward to receiving a positive reply. Sincerely, Steven Forman

[Unit 02 - 학평 ANALYSIS]

On opening day, Isabel arrives at the cafe very early with nervous anticipation. She looks around the cafe, but she can't shake off the feeling that something is missing. As she sets out cups, spoons, and plates, Isabel's doubts grow. She looks around, trying to imagine what else she could do to make the cafe perfect, but nothing comes to mind. Then, in a sudden burst of inspiration, Isabel grabs her paintbrush and transforms the blank walls into landscapes, adding flowers and trees. As she paints, her doubts begin to fade. Looking at her handiwork, which is beautifully done, she is certain that the cafe will be a success. 'Now, success is not exactly guaranteed,' she thinks to herself, 'but I'll definitely get there.'

[Unit 02 – 01]

"My 10-year-old appeared, in desperate need of a quarter. A quarter? What on earth do you need a quarter for? My tone bordered on irritation. I didn't want to be bothered with such a trivial demand. There's a garage sale up the street, and there's something I just gotta have!	It only costs a quarter. Please?"" I placed a quarter in my son's hand. Moments later, a little voice said, ""Here, Mommy, this is for you."" I glanced down at the hands of my little son and saw a four-inch cream-colored statue of two small children hugging one another. Inscribed at their feet were words that read It starts with 'L' ends with 'E' and in between are 'O' and 'V.' As I watched him race back to the garage sale, I smiled with a heart full of happiness. That 25-cent garage sale purchase brought me a lot of joy. “

[Unit 02 – 02]

Ester stood up as soon as she heard the hum of a hover engine outside. Mail, she shouted and ran down the third set of stairs and swung open the door. It was pouring now, but she ran out into the rain. She was facing the mailbox. There was a single, unopened letter inside. She was sure this must be what she was eagerly waiting for. Without hesitation, she tore open the envelope. She pulled out the paper and unfolded it. The letter said, 'Thank you for applying to our company. We would like to invite you to our internship program. We look forward to seeing you soon.' She jumped up and down and looked down at the letter again. She couldn't wait to tell this news to her family.

[Unit 02 – 03]

Dan and I were supposed to make a presentation that day. Right after the class started, my phone buzzed. It was a text from Dan saying, "I can't make it on time. There's been a car accident on the road!" I almost fainted. 'What should I do?' Dan didn't show up before our turn, and soon I was standing in front of the whole class. I managed to finish my portion, and my mind went blank for a few seconds, wondering what to do. 'Hold yourself together!' I quickly came to my senses and worked through Dan's part of the presentation as best as I could. After a few moments, I finished the entire presentation on my own. Only then did the tension vanish. I could see our professor's beaming face.

[Unit 02 – 04]

There was no choice next morning but to turn in my private reminiscence of Belleville. Two days passed before Mr. Fleagle returned the graded papers, and he returned everyone's but mine. I was anxiously expecting for a command to report to Mr. Fleagle immediately after school for discipline when I saw him lift my paper from his desk and rap for the class's attention. Now, boys, he said, "I want to read you an essay. This is titled 'The Art of Eating Spaghetti.'" And he started to read. My words! He was reading my words out loud to the entire class. What's more, the entire class was listening attentively. Then somebody laughed, then the entire class was laughing, and not in contempt and ridicule, but with openhearted enjoyment. I did my best to avoid showing pleasure, but what I was feeling was pure ecstasy at this startling demonstration that my words had the power to make people laugh.

[Unit 02 – 05]

I walked up to the little dark brown door and knocked. Nobody answered. I pushed on the door carefully. When the door swung open with a rusty creak, a man was standing in a back corner of the room. My hands flew over my mouth as I started to scream. He was just standing there, watching me! As my heart continued to race, I saw that he had also put his hands over his mouth. Wait a minute... It was a mirror! I took a deep breath and walked past a table to the old mirror that stood in the back of the room. I felt my heartbeat returning to normal, and calmly looked at my reflection in the mirror.

[Unit 02 – 06]

Hours later ― when my back aches from sitting, my hair is styled and dry, and my almost invisible makeup has been applied ― Ash tells me it's time to change into my dress. We've been waiting until the last minute, afraid any refreshments I eat might accidentally fall onto it and stain it. There's only thirty minutes left until the show starts, and the nerves that have been torturing Ash seem to have escaped her, choosing a new victim in me. My palms are sweating, and I have butterflies in my stomach. Nearly all the models are ready, some of them already dressed in their nineteenth-century costumes. Ash tightens my corset.

[Unit 02 – 07]

One Friday afternoon, Ted was called to the vice president of human resources. Ted sat down, beaming in anticipation. Today was the big day and this meeting would mark a turning point in his career! Ted felt sure that it was for his promotion and that the vice president would make him the marketing manager. Ted, there is no easy way to say this. Ted suddenly realized this meeting wasn't going to be as he expected. Ted's mind went blank. The vice president continued, "Ted, I know you've desperately wanted this promotion, but we decided Mike is more suitable." Ted just sat there, frozen. He felt as if he had been hit by a truck. Don't panic. All he was able to do was repeat that sentence over and over to himself.

[Unit 02 – 08]

Dave sat up on his surfboard and looked around. He was the last person in the water that afternoon. Suddenly something out toward the horizon caught his eye and his heart froze. It was every surfer's worst nightmare ― the fin of a shark. And it was no more than 20 meters away! He turned his board toward the beach and started kicking his way to the shore. Shivering, he gripped his board tighter and kicked harder. 'I'm going to be okay,' he thought to himself. 'I need to let go of the fear.' Five minutes of terror that felt like a lifetime passed before he was on dry land again. Dave sat on the beach and caught his breath. His mind was at ease. He was safe. He let out a contented sigh as the sun started setting behind the waves.

[Unit 02 – 09]

It was a day I was due to give a presentation at work, not something I'd do often. As I stood up to begin, I froze. A chilly 'pins-and-needles' feeling crept over me, starting in my hands. Time seemed to stand still as I struggled to start speaking, and I felt a pressure around my throat, as though my voice was trapped and couldn't come out. Gazing around at the blur of faces, I realized they were all waiting for me to begin, but by now I knew I couldn't continue.

[Unit 02 – 10]

Ryan, an eleven-year-old boy, ran home as fast as he could. Finally, summer break had started! When he entered the house, his mom was standing in front of the refrigerator, waiting for him. She told him to pack his bags. Ryan's heart soared like a balloon. Pack for what? Are we going to Disneyland? He couldn't remember the last time his parents had taken him on a vacation. His eyes beamed. You're spending the summer with uncle Tim and aunt Gina. Ryan groaned. The whole summer? Yes, the whole summer. The anticipation he had felt disappeared in a flash. For three whole miserable weeks, he would be on his aunt and uncle's farm. He sighed.

[Unit 02 – 11]

Meghan looked up and saw angry gray clouds rolling across the water. The storm had turned and was coming her way. She stood up and reached for her sandals. That's when she spotted the dog splashing around in the middle of the lake. At first she thought he was playing. She watched for a second or two, then realized the dog wasn't playing. He was trying to keep from going under. With her heart pounding like a trip-hammer, she ran into the water and started swimming toward the dog. Before she got to the dog, the rain started. She saw the dog, and seconds later he was gone. She pushed forward frantically, her arms reaching out in long strokes, her legs kicking harder and faster.

[Unit 02 – 12]

It was time for the results of the speech contest. I was still skeptical whether I would win a prize or not. My hands were trembling due to the anxiety. I thought to myself, 'Did I work hard enough to outperform the other participants?' After a long wait, an envelope was handed to the announcer. She tore open the envelope to pull out the winner's name. My hands were now sweating and my heart started pounding really hard and fast. The winner of the speech contest is Josh Brown! the announcer declared. As I realized my name had been called, I jumped with joy. I can't believe it. I did it! I exclaimed. I felt like I was in heaven. Almost everybody gathered around me and started congratulating me for my victory.

[Unit 03 - 학평 ANALYSIS]

The introduction of new technologies clearly has both positive and negative impacts for sustainable development. Good management of technological resources needs to take them fully into account. Technological developments in sectors such as nuclear energy and agriculture provide examples of how not only environmental benefits but also risks to the environment or human health can accompany technological advances. New technologies have profound social impacts as well. Since the industrial revolution, technological advances have changed the nature of skills needed in workplaces, creating certain types of jobs and destroying others, with impacts on employment patterns. New technologies need to be assessed for their full potential impacts, both positive and negative.

[Unit 03 – 01]

Managers frequently try to play psychologist, to "figure out" why an employee has acted in a certain way. Empathizing with employees in order to understand their point of view can be very helpful. However, when dealing with a problem area, in particular, remember that it is not the person who is bad, but the actions exhibited on the job. Avoid making suggestions to employees about personal traits they should change; instead suggest more acceptable ways of performing. For example, instead of focusing on a person's "unreliability," a manager might focus on the fact that the employee "has been late to work seven times this month." It is difficult for employees to change who they are; it is usually much easier for them to change how they act.

[Unit 03 – 02]

The more people have to do unwanted things the more chances are that they create unpleasant environment for themselves and others. If you hate the thing you do but have to do it nonetheless, you have choice between hating the thing and accepting that it needs to be done. Either way you will do it. Doing it from place of hatred will develop hatred towards the self and others around you; doing it from the place of acceptance will create compassion towards the self and allow for opportunities to find a more suitable way of accomplishing the task. If you decide to accept the fact that your task has to be done, start from recognising that your situation is a gift from life; this will help you to see it as a lesson in acceptance.

[Unit 03 – 03]

Clarity in an organization keeps everyone working in one accord and energizes key leadership components like trust and transparency. No matter who or what is being assessed in your organization, what they are being assessed on must be clear and the people must be aware of it. If individuals in your organization are assessed without knowing what they are being assessed on, it can cause mistrust and move your organization away from clarity. For your organization to be productive, cohesive, and successful, trust is essential. Failure to have trust in your organization will have a negative effect on the results of any assessment. It will also significantly hinder the growth of your organization. To conduct accurate assessments, trust is a must - which comes through clarity. In turn, assessments help you see clearer, which then empowers your organization to reach optimal success.

[Unit 03 – 04]

We usually take time out only when we really need to switch off, and when this happens we are often overtired, sick, and in need of recuperation. Me time is complicated by negative associations with escapism, guilt, and regret as well as overwhelm, stress, and fatigue. All these negative connotations mean we tend to steer clear of it. Well, I am about to change your perception of the importance of me time, to persuade you that you should view it as vital for your health and wellbeing. Take this as permission to set aside some time for yourself! Our need for time in which to do what we choose is increasingly urgent in an overconnected, overwhelmed, and overstimulated world.

[Unit 03 – 05]

Though we are marching toward a more global society, various ethnic groups traditionally do things quite differently, and a fresh perspective is valuable in creating an open-minded child. Extensive multicultural experience makes kids more creative (measured by how many ideas they can come up with and by association skills) and allows them to capture unconventional ideas from other cultures to expand on their own ideas. As a parent, you should expose your children to other cultures as often as possible. If you can, travel with your child to other countries; live there if possible. If neither is possible, there are lots of things you can do at home, such as exploring local festivals, borrowing library books about other cultures, and cooking foods from different cultures at your house.

[Unit 03 – 06]

In 2003, British Airways made an announcement that they would no longer be able to operate the London to New York Concorde flight twice a day because it was starting to prove uneconomical. Well, the sales for the flight on this route increased the very next day. There was nothing that changed about the route or the service offered by the airlines. Merely because it became a scarce resource, the demand for it increased. If you are interested in persuading people, then the principle of scarcity can be effectively used. If you are a salesperson trying to increase the sales of a certain product, then you must not merely point out the benefits the customer can derive from the said product, but also point out its uniqueness and what they will miss out on if they don't purchase the product soon. In selling, you should keep in mind that the more limited something is, the more desirable it becomes.

[Unit 03 – 07]

Without guidance from their teacher, students will not embark on a journey of personal development that recognizes the value of cooperation. Left to their own devices, they will instinctively become increasingly competitive with each other. They will compare scores, reports, and feedback within the classroom environment ― just as they do in the sporting arena. We don't need to teach our students about winners and losers. The playground and the media do that for them. However, we do need to teach them that there is more to life than winning and about the skills they need for successful cooperation. A group working together successfully requires individuals with a multitude of social skills, as well as a high level of interpersonal awareness. While some students inherently bring a natural understanding of these skills with them, they are always in the minority. To bring cooperation between peers into your classroom, you need to teach these skills consciously and carefully, and nurture them continuously throughout the school years.

[Unit 03 – 08]

No matter what your situation, whether you are an insider or an outsider, you need to become the voice that challenges yesterday's answers. Think about the characteristics that make outsiders valuable to an organization. They are the people who have the perspective to see problems that the insiders are too close to really notice. They are the ones who have the freedom to point out these problems and criticize them without risking their job or their career. Part of adopting an outsider mentality is forcing yourself to look around your organization with this disassociated, less emotional perspective. If you didn't know your coworkers and feel bonded to them by your shared experiences, what would you think of them? You may not have the job security or confidence to speak your mind to management, but you can make these "outsider" assessments of your organization on your own and use what you determine to advance your career.

[Unit 03 – 09]

When trying to convince someone to change their mind, most people try to lay out a logical argument, or make a passionate plea as to why their view is right and the other person's opinion is wrong. But when you think about it, you'll realize that this doesn't often work. As soon as someone figures out that you are on a mission to change their mind, the metaphorical shutters go down. You'll have better luck if you ask well-chosen, open-ended questions that let someone challenge their own assumptions. We tend to approve of an idea if we thought of it first - or at least, if we think we thought of it first. Therefore, encouraging someone to question their own worldview will often yield better results than trying to force them into accepting your opinion as fact. Ask someone well-chosen questions to look at their own views from another angle, and this might trigger fresh insights.

[Unit 03 – 10]

Children may develop imaginary friends around three or four years of age. Imaginary friends are only a concern if children replace all social interactions with pretend friends. As long as children are developing socially with other children, then imaginary friends are beneficial. Parents often will need reassurance about imaginary friends; they should be respectful of the pretend friends, as well as of their child. Children who create imaginary friends should never be teased, humiliated, or ridiculed in any way. Parents may tire of including the friends in daily activities, such as setting an extra plate at dinner, but they should be reassured that the imaginary friends stage will pass. Until then, imaginary friends should be respected and welcomed by parents because they signify a child's developing imagination.

[Unit 03 – 11]

We all have set patterns in life. We like to label ourselves as this or that and are quite proud of our opinions and beliefs. We all like to read a particular newspaper, watch the same sorts of TV programs or movies, go to the same sort of shops every time, eat the sort of food that suits us, and wear the same type of clothes. And all this is fine. But if we cut ourselves off from all other possibilities, we become boring, rigid, hardened ― and thus likely to get knocked about a bit. You have to see life as a series of adventures. Each adventure is a chance to have fun, learn something, explore the world, expand your circle of friends and experience, and broaden your horizons. Shutting down to adventure means exactly that ― you are shut down.

[Unit 03 – 12]

When I started my career, I looked forward to the annual report from the organization showing statistics for each of its leaders. As soon as I received them in the mail, I'd look for my standing and compare my progress with the progress of all the other leaders. After about five years of doing that, I realized how harmful it was. Comparing yourself to others is really just a needless distraction. The only one you should compare yourself to is you. Your mission is to become better today than you were yesterday. You do that by focusing on what you can do today to improve and grow. Do that enough, and if you look back and compare the you of weeks, months, or years ago to the you of today, you should be greatly encouraged by your progress.

[Unit 04 - 학평 ANALYSIS]

It's remarkable that positive fantasies help us relax to such an extent that it shows up in physiological tests. If you want to unwind, you can take some deep breaths, get a massage, or go for a walk ― but you can also try simply closing your eyes and fantasizing about some future outcome that you might enjoy. But what about when your objective is to make your wish a reality? The last thing you want to be is relaxed. You want to be energized enough to get off the couch and lose those pounds or find that job or study for that test, and you want to be motivated enough to stay engaged even when the inevitable obstacles or challenges arise. The principle of "Dream it. Wish it. Do it." does not hold true, and now we know why: in dreaming it, you undercut the energy you need to do it. You put yourself in a temporary state of complete happiness, calmness ― and inactivity.

[Unit 04 – 01]

Perhaps, the advent of Artificial Intelligence (AI) in the workplace may bode well for Emotional Intelligence (EI). As AI gains momentum and replaces people in jobs at every level, predictions are, there will be a premium placed on people who have high ability in EI. The emotional messages people send and respond to while interacting are, at this point, far beyond the ability of AI programs to mimic. As we get further into the age of the smart machine, it is likely that sensing and managing emotions will remain one type of intelligence that puzzles AI. This means people and jobs involving EI are safe from being taken over by machines. In a survey, almost three out of four executives see EI as a "must-have" skill for the workplace in the future as the automatizing of routine tasks bumps up against the impossibility of creating effective AI for activities that require emotional skill.

[Unit 04 – 02]

Brands that fail to grow and develop lose their relevance. Think about the person you knew who was once on the fast track at your company, who is either no longer with the firm or, worse yet, appears to have hit a plateau in his or her career. Assuming he or she did not make an ambitious move, more often than not, this individual is a victim of having failed to stay relevant and embrace the advances in his or her industry. Think about the impact personal computing technology had on the first wave of executive leadership exposed to the technology. Those who embraced the technology were able to integrate it into their work styles and excel. Those who were resistant many times found few opportunities to advance their careers and in many cases were ultimately let go through early retirement for failure to stay relevant and update their skills.

[Unit 04 – 03]

In one study, when researchers suggested that a date was associated with a new beginning (such as "the first day of spring"), students viewed it as a more attractive time to kick-start goal pursuit than when researchers presented it as an unremarkable day (such as "the third Thursday in March"). Whether it was starting a new gym habit or spending less time on social media, when the date that researchers suggested was associated with a new beginning, more students wanted to begin changes right then. And more recent research by a different team found that similar benefits were achieved by showing goal seekers modified weekly calendars. When calendars depicted the current day (either Monday or Sunday) as the first day of the week, people reported feeling more motivated to make immediate progress on their goals.

[Unit 04 – 04]

Most parents think that if our child would just "behave," we could stay calm as parents. The truth is that managing our own emotions and actions is what allows us to feel peaceful as parents. Ultimately we can't control our children or the obstacles they will face ― but we can always control our own actions. Parenting isn't about what our child does, but about how we respond. In fact, most of what we call parenting doesn't take place between a parent and child but within the parent. When a storm brews, a parent's response will either calm it or trigger a full‐scale tsunami. Staying calm enough to respond constructively to all that childish behavior ― and the stormy emotions behind it ― requires that we grow, too. If we can use those times when our buttons get pushed to reflect, not just react, we can notice when we lose equilibrium and steer ourselves back on track. This inner growth is the hardest work there is, but it's what enables you to become a more peaceful parent, one day at a time.

[Unit 04 – 05]

Advice from a friend or family member is the most well-meaning of all, but it's not the best way to match yourself with a new habit. While hot yoga may have changed your friend's life, does that mean it's the right practice for you? We all have friends who swear their new habit of getting up at 4:30 a.m. changed their lives and that we have to do it. I don't doubt that getting up super early changes people's lives, sometimes in good ways and sometimes not. But be cautious: You don't know if this habit will actually make your life better, especially if it means you get less sleep. So yes, you can try what worked for your friend, but don't beat yourself up if your friend's answer doesn't change you in the same way. All of these approaches involve guessing and chance. And that's not a good way to strive for change in your life.

[Unit 04 – 06]

Who is this person? This is the question all stories ask. It emerges first at the ignition point. When the initial change strikes, the protagonist overreacts or behaves in an otherwise unexpected way. We sit up, suddenly attentive. 'Who is this person who behaves like this?' The question then re-emerges every time the protagonist is challenged by the plot and compelled to make a choice. Everywhere in the narrative that the question is present, the reader or viewer will likely be engaged. Where the question is absent, and the events of drama move out of its narrative beam, they are at risk of becoming detached ― perhaps even bored. If there's a single secret to storytelling then I believe it's this. 'Who is this person?' Or, from the perspective of the character, 'Who am I?' It's the definition of drama. It is its electricity, its heartbeat, its fire.

[Unit 04 – 07]

Too many officials in troubled cities wrongly imagine that they can lead their city back to its former glories with some massive construction project ― a new stadium or light rail system, a convention center, or a housing project. With very few exceptions, no public policy can slow the tidal forces of urban change. We mustn't ignore the needs of the poor people who live in the Rust Belt, but public policy should help poor people, not poor places. Shiny new real estate may dress up a declining city, but it doesn't solve its underlying problems. The hallmark of declining cities is that they have too much housing and infrastructure relative to the strength of their economies. With all that supply of structure and so little demand, it makes no sense to use public money to build more supply. The folly of building-centric urban renewal reminds us that cities aren't structures; cities are people.

[Unit 04 – 08]

Fears of damaging ecosystems are based on the sound conservationist principle that we should aim to minimize the disruption we cause, but there is a risk that this principle may be confused with the old idea of a 'balance of nature.' This supposes a perfect order of nature that will seek to maintain itself and that we should not change. It is a romantic, not to say idyllic, notion, but deeply misleading because it supposes a static condition. Ecosystems are dynamic, and although some may endure, apparently unchanged, for periods that are long in comparison with the human lifespan, they must and do change eventually. Species come and go, climates change, plant and animal communities adapt to altered circumstances, and when examined in fine detail such adaptation and consequent change can be seen to be taking place constantly. The 'balance of nature' is a myth. Our planet is dynamic, and so are the arrangements by which its inhabitants live together.

[Unit 04 – 09]

The vast majority of companies, schools, and organizations measure and reward "high performance" in terms of individual metrics such as sales numbers, resume accolades, and test scores. The problem with this approach is that it is based on a belief we thought science had fully confirmed: that we live in a world of "survival of the fittest." It teaches us that those with the best grades, or the most impressive resume, or the highest point score, will be the ONLY ones to succeed. The formula is simple: be better and smarter and more creative than everyone else, and you will be successful. But this formula is inaccurate. Thanks to new research, we now know that achieving our highest potential is not about survival of the fittest but survival of the best fit. In other words, success is not just about how creative or smart or driven you are, but how well you are able to connect with, contribute to, and benefit from the ecosystem of people around you.

[Unit 04 – 10]

The psychology professor Dr. Kelly Lambert's research explains that keeping what she calls the "effort-driven rewards circuit" well engaged helps you deal with challenges in the environment around you or in your emotional life more effectively and efficiently. Doing hands-on activities that produce results you can see and touch ― such as knitting a scarf, cooking from scratch, or tending a garden ― fuels the reward circuit so that it functions optimally. She argues that the documented increase in depression among Americans may be directly correlated with the decline of purposeful physical activity. When we work with our hands, it increases the release of the neurochemicals dopamine and serotonin, both responsible for generating positive emotions. She also explains that working with our hands gives us a greater sense of control over our environment and more connection to the world around us. All of which contributes to a reduction in stress and anxiety and builds resilience against the onset of depression.

[Unit 04 – 11]

Personal blind spots are areas that are visible to others but not to you. The developmental challenge of blind spots is that you don't know what you don't know. Like that area in the side mirror of your car where you can't see that truck in the lane next to you, personal blind spots can easily be overlooked because you are completely unaware of their presence. They can be equally dangerous as well. That truck you don't see? It's really there! So are your blind spots. Just because you don't see them, doesn't mean they can't run you over. This is where you need to enlist the help of others. You have to develop a crew of special people, people who are willing to hold up that mirror, who not only know you well enough to see that truck, but who also care enough about you to let you know that it's there.

[Unit 04 – 12]

Many of the leaders I know in the media industry are intelligent, capable, and honest. But they are leaders of companies that appear to have only one purpose: the single-minded pursuit of short-term profit and "shareholder value." I believe, however, that the media industry, by its very nature and role in our society and global culture, must act differently than other industries ─ especially because they have the free use of our public airwaves and our digital spectrum, and have almost unlimited access to our children's hearts and minds. These are priceless assets, and the right to use them should necessarily carry serious and long-lasting responsibilities to promote the public good.

[Unit 05 - 학평 ANALYSIS]

What consequences of eating too many grapes and other sweet fruit could there possibly be for our brains? A few large studies have helped to shed some light. In one, higher fruit intake in older, cognitively healthy adults was linked with less volume in the hippocampus. This finding was unusual, since people who eat more fruit usually display the benefits associated with a healthy diet. In this study, however, the researchers isolated various components of the subjects' diets and found that fruit didn't seem to be doing their memory centers any favors. Another study from the Mayo Clinic saw a similar inverse relationship between fruit intake and volume of the cortex, the large outer layer of the brain. Researchers in the latter study noted that excessive consumption of high‑sugar fruit (such as mangoes, bananas, and pineapples) may cause metabolic and cognitive problems as much as processed carbs do.

[Unit 05 – 01]

If cooking is as central to human identity, biology, and culture as the biological anthropologist Richard Wrangham suggests, it stands to reason that the decline of cooking in our time would have serious consequences for modern life, and so it has. Are they all bad? Not at all. The outsourcing of much of the work of cooking to corporations has relieved women of what has traditionally been their exclusive responsibility for feeding the family, making it easier for them to work outside the home and have careers. It has headed off many of the domestic conflicts that such a large shift in gender roles and family dynamics was bound to spark. It has relieved other pressures in the household, including longer workdays and overscheduled children, and saved us time that we can now invest in other pursuits. It has also allowed us to diversify our diets substantially, making it possible even for people with no cooking skills and little money to enjoy a whole different cuisine. All that's required is a microwave.

[Unit 05 – 02]

Education must focus on the trunk of the tree of knowledge, revealing the ways in which the branches, twigs, and leaves all emerge from a common core. Tools for thinking stem from this core, providing a common language with which practitioners in different fields may share their experience of the process of innovation and discover links between their creative activities. When the same terms are employed across the curriculum, students begin to link different subjects and classes. If they practice abstracting in writing class, if they work on abstracting in painting or drawing class, and if, in all cases, they call it abstracting, they begin to understand how to think beyond disciplinary boundaries. They see how to transform their thoughts from one mode of conception and expression to another. Linking the disciplines comes naturally when the terms and tools are presented as part of a universal imagination.

[Unit 05 – 03]

Native Americans often sang and danced in preparation for launching an attack. The emotional and neurochemical excitement that resulted from this preparatory singing gave them stamina to carry out their attacks. What may have begun as an unconscious, uncontrolled act ― rushing their victims with singing and beating drums in a frenzy ― could have become a strategy as the victors saw firsthand the effect their actions had on those they were attacking. Although war dances risk warning an enemy of an upcoming attack, the arousal and synchronizing benefits for the attackers may compensate for the loss of surprise. Humans who sang, danced, and marched may have enjoyed a strong advantage on the battlefield as well as intimidated enemies who witnessed such a spectacle. Nineteenth-and twentieth-century Germans feared no one more than the Scots ― the bagpipes and drums were disturbing in their sheer loudness and visual spectacle.

[Unit 05 – 04]

We have already seen that learning is much more efficient when done at regular intervals: rather than cramming an entire lesson into one day, we are better off spreading out the learning. The reason is simple: every night, our brain consolidates what it has learned during the day. This is one of the most important neuroscience discoveries of the last thirty years: sleep is not just a period of inactivity or a garbage collection of the waste products that the brain accumulated while we were awake. Quite the contrary: while we sleep, our brain remains active; it runs a specific algorithm that replays the important events it recorded during the previous day and gradually transfers them into a more efficient compartment of our memory.

[Unit 05 – 05]

In the movie Groundhog Day, a weatherman played by Bill Murray is forced to relive a single day over and over again. Confronted with this seemingly endless loop, he eventually rebels against living through the same day the same way twice. He learns French, becomes a great pianist, befriends his neighbors, helps the poor. Why do we cheer him on? Because we don't want perfect predictability, even if what's on repeat is appealing. Surprise engages us. It allows us to escape autopilot. It keeps us awake to our experience. In fact, the neurotransmitter systems involved in reward are tied to the level of surprise: rewards delivered at regular, predictable times yield a lot less activity in the brain than the same rewards delivered at random unpredictable times. Surprise gratifies.

[Unit 05 – 06]

Individual human beings differ from one another physically in a multitude of visible and invisible ways. If races ― as most people define them ― are real biological entities, then people of African ancestry would share a wide variety of traits while people of European ancestry would share a wide variety of different traits. But once we add traits that are less visible than skin coloration, hair texture, and the like, we find that the people we identify as "the same race" are less and less like one another and more and more like people we identify as "different races." Add to this point that the physical features used to identify a person as a representative of some race (e.g. skin coloration) are continuously variable, so that one cannot say where "brown skin" becomes "white skin." Although the physical differences themselves are real, the way we use physical differences to classify people into discrete races is a cultural construction.

[Unit 05 – 07]

Shutter speed refers to the speed of a camera shutter. In behavior profiling, it refers to the speed of the eyelid. When we blink, we reveal more than just blink rate. Changes in the speed of the eyelid can indicate important information; shutter speed is a measurement of fear. Think of an animal that has a reputation for being fearful. A Chihuahua might come to mind. In mammals, because of evolution, our eyelids will speed up to minimize the amount of time that we can't see an approaching predator. The greater the degree of fear an animal is experiencing, the more the animal is concerned with an approaching predator. In an attempt to keep the eyes open as much as possible, the eyelids involuntarily speed up. Speed, when it comes to behavior, almost always equals fear. In humans, if we experience fear about something, our eyelids will do the same thing as the Chihuahua; they will close and open more quickly.

[Unit 05 – 08]

Many marine species including oysters, marsh grasses, and fish were deliberately introduced for food or for erosion control, with little knowledge of the impacts they could have. Fish and shellfish have been intentionally introduced all over the world for aquaculture, providing food and jobs, but they can escape and become a threat to native species, ecosystem function, or livelihoods. Atlantic salmon are reared in ocean net-pens in Washington State and British Columbia. Many escape each year, and they have been recovered in both saltwater and freshwater in Washington State, British Columbia, and Alaska. Recreational fishing can also spread invasive species. Bait worms from Maine are popular throughout the country. They are commonly packed in seaweed which contains many other organisms. If the seaweed is discarded, it or the organisms on it can colonize new areas. Fishing boots, recreational boats, and trailers can pick up organisms at one location and move them elsewhere.

[Unit 05 – 09]

Before the modern scientific era, creativity was attributed to a superhuman force; all novel ideas originated with the gods. After all, how could a person create something that did not exist before the divine act of creation? In fact, the Latin meaning of the verb "inspire" is "to breathe into," reflecting the belief that creative inspiration was similar to the moment in creation when God first breathed life into man. Plato argued that the poet was possessed by divine inspiration, and Plotin wrote that art could only be beautiful if it descended from God. The artist's job was not to imitate nature but rather to reveal the sacred and transcendent qualities of nature. Art could only be a pale imitation of the perfection of the world of ideas. Greek artists did not blindly imitate what they saw in reality; instead they tried to represent the pure, true forms underlying reality, resulting in a sort of compromise between abstraction and accuracy.

[Unit 05 – 10]

I was brought up to believe that if I get lost in a large forest, I will sooner or later end up where I started. Without knowing it, people who are lost will always walk in a circle. In the book Finding Your Way Without Map or Compass, author Harold Gatty confirms that this is true. We tend to walk in circles for several reasons. The most important is that virtually no human has two legs of the exact same length. One leg is always slightly longer than the other, and this causes us to turn without even noticing it. In addition, if you are hiking with a backpack on, the weight of that backpack will inevitably throw you off balance. Our dominant hand factors into the mix too. If you are right-handed, you will have a tendency to turn toward the right. And when you meet an obstacle, you will subconsciously decide to pass it on the right side.

[Unit 05 – 11]

It has long been held that the capacity for laughter is a peculiarly human characteristic. The witty Lucian of Samosata (2nd century A.D.) noted that the way to distinguish a man from a donkey is that one laughs and the other does not. In all societies humor is important not only in individual communication but also as a molding force of social groups, reinforcing their norms and regulating behavior. Each particular time, each era, in fact each moment, has its own condition and themes for laughter... because of the major preoccupations, concerns, interests, activities, relations, and mode prevailing at the time. The ultimate goal of anyone who studies another culture, such as ancient Greece, is to understand the people themselves who were more than the sum total of monuments, historical incidents, or social groupings. One way to approach this goal directly is to study the culture's humor. As Goethe aptly observed: "Men show their characters in nothing more clearly than in what they think laughable."

[Unit 05 – 12]

A child whose behavior is out of control improves when clear limits on their behavior are set and enforced. However, parents must agree on where a limit will be set and how it will be enforced. The limit and the consequence of breaking the limit must be clearly presented to the child. Enforcement of the limit should be consistent and firm. Too many limits are difficult to learn and may spoil the normal development of autonomy. The limit must be reasonable in terms of the child's age, temperament, and developmental level. To be effective, both parents (and other adults in the home) must enforce limits. Otherwise, children may effectively split the parents and seek to test the limits with the more indulgent parent. In all situations, to be effective, punishment must be brief and linked directly to a behavior.

[Unit 06 - 학평 ANALYSIS]

Winning turns on a self‑conscious awareness that others are watching. It's a lot easier to move under the radar when no one knows you and no one is paying attention. You can mess up and be rough and get dirty because no one even knows you're there. But as soon as you start to win, and others start to notice, you're suddenly aware that you're being observed. You're being judged. You worry that others will discover your flaws and weaknesses, and you start hiding your true personality, so you can be a good role model and good citizen and a leader that others can respect. There is nothing wrong with that. But if you do it at the expense of being who you really are, making decisions that please others instead of pleasing yourself, you're not going to be in that position very long. When you start apologizing for who you are, you stop growing and you stop winning. Permanently.

[Unit 06 – 01]

As you may already know, what and how you buy can be political. To whom do you want to give your money? Which companies and corporations do you value and respect? Be mindful about every purchase by carefully researching the corporations that are taking our money to decide if they deserve our support. Do they have a record of polluting the environment, or do they have fair-trade practices and an end-of-life plan for the products they make? Are they committed to bringing about good in the world? For instance, my family has found a company producing recycled, plastic-packaging-free toilet paper with a social conscience. They contribute 50 percent of their profits to the construction of toilets around the world, and we're genuinely happy to spend our money on this special toilet paper each month. Remember that the corporate world is built on consumers, so as a consumer you have the power to vote with your wallet and encourage companies to embrace healthier and more sustainable practices with every purchase you choose to make.

[Unit 06 – 02]

New words and expressions emerge continually in response to new situations, ideas and feelings. The Oxford English Dictionary publishes supplements of new words and expressions that have entered the language. Some people deplore this kind of thing and see it as a drift from correct English. But it was only in the eighteenth century that any attempt was made to formalize spelling and punctuation of English at all. The language we speak in the twenty-first century would be virtually unintelligible to Shakespeare, and so would his way of speaking to us. Alvin Toffler estimated that Shakespeare would probably only understand about 250,000 of the 450,000 words in general use in the English language now. In other words, so to speak, if Shakespeare were to materialize in London today he would understand, on average, only five out of every nine words in our vocabulary.

[Unit 06 – 03]

The recent "cycling as a lifestyle" craze has expressed itself in an increase in the number of active cyclists and in growth of cycling club membership in several European, American, Australian and Asian urban areas. It has also been accompanied by a symbolic reinterpretation of the bicycle. After the bicycle had been associated with poverty for many years, expensive recreational bicycles or recreationally-inspired commuting bicycles have suddenly become aspirational products in urban environments. In present times, cycling has become an activity which is also performed for its demonstrative value, its role in identity construction and its effectiveness in impressing others and signaling social status. To a certain extent, cycling has turned into a symbolic marker of the well-off. Obviously, value-laden consumption behavior is by no means limited to cycling. However, the link with identity construction and conspicuous consumption has become particularly manifest in the case of cycling.

[Unit 06 – 04]

From the earliest times, healthcare services have been recognized to have two equal aspects, namely clinical care and public healthcare. In classical Greek mythology, the god of medicine, Asklepios, had two daughters, Hygiea and Panacea. The former was the goddess of preventive health and wellness, or hygiene, and the latter the goddess of treatment and curing. In modern times, the societal ascendancy of medical professionalism has caused treatment of sick patients to overshadow those preventive healthcare services provided by the less heroic figures of sanitary engineers, biologists, and governmental public health officers. Nevertheless, the quality of health that human populations enjoy is attributable less to surgical dexterity, innovative pharmaceutical products, and bioengineered devices than to the availability of public sanitation, sewage management, and services which control the pollution of the air, drinking water, urban noise, and food for human consumption. The human right to the highest attainable standard of health depends on public healthcare services no less than on the skills and equipment of doctors and hospitals.

[Unit 06 – 05]

A building is an inanimate object, but it is not an inarticulate one. Even the simplest house always makes a statement, one expressed in brick and stone, in wood and glass, rather than in words ― but no less loud and obvious. When we see a rusting trailer surrounded by weeds and abandoned cars, or a brand-new mini-mansion with a high wall, we instantly get a message. In both of these cases, though in different accents, it is "Stay Out of Here." It is not only houses, of course, that communicate with us. All kinds of buildings ― churches, museums, schools, hospitals, restaurants, and offices ― speak to us silently. Sometimes the statement is deliberate. A store or restaurant can be designed so that it welcomes mostly low-income or high-income customers. Buildings tell us what to think and how to act, though we may not register their messages consciously.

[Unit 06 – 06]

The free market has liberated people in a way that Marxism never could. What is more, as A. O. Hirschman, the Harvard economic historian, showed in his classic study The Passions and the Interests, the market was seen by Enlightenment thinkers Adam Smith, David Hume, and Montesquieu as a powerful solution to one of humanity's greatest traditional weaknesses: violence. When two nations meet, said Montesquieu, they can do one of two things: they can wage war or they can trade. If they wage war, both are likely to lose in the long run. If they trade, both will gain. That, of course, was the logic behind the establishment of the European Union: to lock together the destinies of its nations, especially France and Germany, in such a way that they would have an overwhelming interest not to wage war again as they had done to such devastating cost in thefirst half of the twentieth century.

[Unit 06 – 07]

Before the fancy high-rises, financial headquarters, tourist centers, and souvenir peddlers made their way to Battery Park City, the area behind the World Trade Center was a giant, gross landfill. In 1982, artist Agnes Denes decided to return that landfill back to its roots, although temporarily. Denes was commissioned by the Public Art Fund to create one of the most significant and fantastical pieces of public work Manhattan has ever seen. Her concept was not a traditional sculpture, but a living installation that changed the way the public looked at art. In the name of art, Denes put a beautiful golden wheat field right in the shadow of the gleaming Twin Towers. For Wheatfield ─ A Confrontation, Denes and volunteers removed trash from four acres of land, then planted amber waves of grain atop the area. After months of farming and irrigation, the wheat field was thriving and ready. The artist and her volunteers harvested thousands of pounds of wheat to give to food banks in the city, nourishing both the minds and bodies of New Yorkers.

[Unit 06 – 08]

News reporters are taught to start their stories with the most important information. The first sentence, called the lead, contains the most essential elements of the story. A good lead can convey a lot of information. After the lead, information is presented in decreasing order of importance. Journalists call this the "inverted pyramid" structure ― the most important information (the widest part of the pyramid) is at the top. The inverted pyramid is great for readers. No matter what the reader's attention span ― whether she reads only the lead or the entire story ― the inverted pyramid maximizes the information she gets. Think of the alternative: If news stories were written like mysteries with a dramatic payoff at the end, then readers who broke off in mid‑story would miss the point. Imagine waiting until the last sentence of a story to find out who won the presidential election or the Super Bowl.

[Unit 06 – 09]

In government, in law, in culture, and in routine everyday interaction beyond family and immediate neighbours, a widely understood and clearly formulated language is a great aid to mutual confidence. When dealing with property, with contracts, or even just with the routine exchange of goods and services, concepts and descriptions need to be as precise and unambiguous as possible, otherwise misunderstandings will arise. If full communication with a potential counterparty in a deal is not possible, then uncertainty and probably a measure of distrust will remain. As economic life became more complex in the later Middle Ages, the need for fuller and more precise communication was accentuated. A shared language facilitated clarification and possibly settlement of any disputes. In international trade also the use of a precise and well-formulated language aided the process of translation. The Silk Road could only function at all because translators were always available at interchange points.

[Unit 06 – 10]

Since the early 1980s, Black Friday has been a kind of unofficial U.S. holiday marking the beginning of the holiday season and, consequently, the most profitable time for retailers in the year. But in recent years, a new movement has come to light, adding a more ecological philosophy. The movement is called Green Friday, and it seeks to raise awareness about the damage that Black Friday brings to the environment. Think of the carbon emissions caused by driving to the mall, the shipping of millions of items around the world, the plastic waste produced by packaging, and even the long-term waste produced by mindlessly buying things we don't need. Green Friday is about changing the way we see this day and switching our mindset from "buy, buy, buy" to finding alternative ways to give gifts during the holiday season so we don't cause further damage to the Earth. Even if only a small percentage of the population makes the switch, it'll mean great things for the environment.

[Unit 06 – 11]

Many inventions were invented thousands of years ago so it can be difficult to know their exact origins. Sometimes scientists discover a model of an early invention and from this model they can accurately tell us how old it is and where it came from. However, there is always the possibility that in the future other scientists will discover an even older model of the same invention in a different part of the world. In fact, we are forever discovering the history of ancient inventions. An example of this is the invention of pottery. For many years archaeologists believed that pottery was first invented in the Near East (around modern Iran) where they had found pots dating back to 9,000 B.C. In the 1960s, however, older pots from 10,000 B.C. were found on Honshu Island, Japan. There is always a possibility that in the future archaeologists will find even older pots somewhere else.

[Unit 06 – 12]

If a food contains more sugar than any other ingredient, government regulations require that sugar be listed first on the label. But if a food contains several different kinds of sweeteners, they can be listed separately, which pushes each one farther down the list. This requirement has led the food industry to put in three different sources of sugar so that they don't have to say the food has that much sugar. So sugar doesn't appear first. Whatever the true motive, ingredient labeling still does not fully convey the amount of sugar being added to food, certainly not in a language that's easy for consumers to understand. A world-famous cereal brand's label, for example, indicates that the cereal has 11 grams of sugar per serving. But nowhere does it tell consumers that more than one-third of the box contains added sugar.

[Unit 07 - 학평 ANALYSIS]

North America's native cuisine met the same unfortunate fate as its native people, save for a few relics like the Thanksgiving turkey. Certainly, we still have regional specialties, but the Carolina barbecue will almost certainly have California tomatoes in its sauce, and the Louisiana gumbo is just as likely to contain Indonesian farmed shrimp. If either of these shows up on a fast-food menu with lots of added fats or HFCS, we seem unable either to discern or resist the corruption. We have yet to come up with a strong set of generalized norms, passed down through families, for savoring and sensibly consuming what our land and climate give us. We have, instead, a string of fad diets convulsing our bookstores and bellies, one after another, at the scale of the national best seller. Nine out of ten nutritionists view this as evidence that we have entirely lost our marbles.

[Unit 07 – 01]

I suspect fungi are a little more forward "thinking" than their larger partners. Among trees, each species fights other species. Let's assume the beeches native to Central Europe could emerge victorious in most forests there. Would this really be an advantage? What would happen if a new pathogen came along that infected most of the beeches and killed them? In that case, wouldn't it be more advantageous if there were a certain number of other species around ― oaks, maples, or firs ― that would continue to grow and provide the shade needed for a new generation of young beeches to sprout and grow up? Diversity provides security for ancient forests. Because fungi are also very dependent on stable conditions, they support other species underground and protect them from complete collapse to ensure that one species of tree doesn't manage to dominate.

[Unit 07 – 02]

Everyone's heard the expression don't let the perfect become the enemy of the good. If you want to get over an obstacle so that your idea can become the solution‑based policy you've long dreamed of, you can't have an all‑or‑nothing mentality. You have to be willing to alter your idea and let others influence its outcome. You have to be okay with the outcome being a little different, even a little less, than you wanted. Say you're pushing for a clean water act. Even if what emerges isn't as well‑funded as you wished, or doesn't match how you originally conceived the bill, you'll have still succeeded in ensuring that kids in troubled areas have access to clean water. That's what counts, that they will be safer because of your idea and your effort. Is it perfect? No. Is there more work to be done? Absolutely. But in almost every case, helping move the needle forward is vastly better than not helping at all.

[Unit 07 – 03]

Research in the science of peak performance and motivation points to the fact that different tasks should ideally be matched to our energy level. For example, analytical tasks are best accomplished when our energy is high and we are free from distractions and able to focus. I generally wake up energized. Over the years, I have consistently stuck to the habit of "eating my problems for breakfast." I'm someone who tends to overthink different scenarios and conversations that haven't happened yet. When I procrastinate on talking with an unhappy client or dealing with an unpleasant email, I find I waste too much emotional energy during the day. It's as if the task hangs over my head, and I'll spend more time worrying about it, talking about it, and avoiding it, than it would actually take to just take care of it. So for me, it'll always be the first thing I get done. If you know you are not a morning person, be strategic about scheduling your difficult work later in the day.

[Unit 07 – 04]

Perhaps worse than attempting to get the bad news out of the way is attempting to soften it or simply not address it at all. This "Mum Effect" ― a term coined by psychologists Sidney Rosen and Abraham Tesser in the early 1970s ― happens because people want to avoid becoming the target of others' negative emotions. We all have the opportunity to lead change, yet it often requires of us the courage to deliver bad news to our superiors. We don't want to be the innocent messenger who falls before a firing line. When our survival instincts kick in, they can override our courage until the truth of a situation gets watered down. The Mum Effect and the resulting filtering can have devastating effects in a steep hierarchy, writes Robert Sutton, an organizational psychologist. What starts out as bad news becomes happier and happier as it travels up the ranks ― because after each boss hears the news from his or her subordinates, he or she makes it sound a bit less bad before passing it up the chain.

[Unit 07 – 05]

For companies interested in delighting customers, exceptional value and service become part of the overall company culture. For example, year after year, Pazano ranks at or near the top of the hospitality industry in terms of customer satisfaction. The company's passion for satisfying customers is summed up in its credo, which promises that its luxury hotels will deliver a truly memorable experience. Although a customer-centered firm seeks to deliver high customer satisfaction relative to competitors, it does not attempt to maximize customer satisfaction. A company can always increase customer satisfaction by lowering its price or increasing its services. But this may result in lower profits. Thus, the purpose of marketing is to generate customer value profitably. This requires a very delicate balance: the marketer must continue to generate more customer value and satisfaction but not 'give away the house'.

[Unit 07 – 06]

Studies by Vosniado and Brewer illustrate Fish is Fish-style assimilation in the context of young children's thinking about the earth. They worked with children who believed that the earth is flat (because this fit their experiences) and attempted to help them understand that, in fact, it is spherical. When told it is round, children often pictured the earth as a pancake rather than as a sphere. If they were then told that it is round like a sphere, they interpreted the new information about a spherical earth within their flat-earth view by picturing a pancake-like flat surface inside or on top of a sphere, with humans standing on top of the pancake. The model of the earth that they had developed and that helped them explain how they could stand or walk upon its surface ― did not fit the model of a spherical earth. Like the story Fish is Fish, where a fish imagines everything on land to be fish-like, everything the children heard was incorporated into their preexisting views.

[Unit 07 – 07]

The most dangerous threat to our ability to concentrate is not that we use our smartphone during working hours, but that we use it too irregularly. By checking our emails every now and then on the computer and our text messages here and there on our phone with no particular schedule or rhythm in mind, our brain loses its ability to effectively filter. The solution is to regulate your devices as if you were on a strict diet. When it comes to nutrition, sticking to a fixed time plan for breakfast, lunch, and dinner allows your metabolism to adjust, thereby causing less hunger during the in-between phases. Your belly will start to rumble around 12:30 p.m. each day, but that's okay because that's a good time to eat lunch. If something unexpected happens, you can add a snack every now and then to get fresh energy, but your metabolism will remain under control. It's the same with our brain when you put it on a "media diet."

[Unit 07 – 08]

The creative team exhibits paradoxical characteristics. It shows tendencies of thought and action that we'd assume to be mutually exclusive or contradictory. For example, to do its best work, a team needs deep knowledge of subjects relevant to the problem it's trying to solve, and a mastery of the processes involved. But at the same time, the team needs fresh perspectives that are unencumbered by the prevailing wisdom or established ways of doing things. Often called a "beginner's mind," this is the newcomers' perspective: people who are curious, even playful, and willing to ask anything - no matter how naive the question may seem - because they don't know what they don't know. Thus, bringing together contradictory characteristics can accelerate the process of new ideas.

[Unit 07 – 09]

Author Elizabeth Gilbert tells the fable of a great saint who would lead his followers in meditation. Just as the followers were dropping into their zen moment, they would be disrupted by a cat that would walk through the temple meowing and bothering everyone. The saint came up with a simple solution: He began to tie the cat to a pole during meditation sessions. This solution quickly developed into a ritual: Tie the cat to the pole first, meditate second. When the cat eventually died of natural causes, a religious crisis followed. What were the followers supposed to do? How could they possibly meditate without tying the cat to the pole? This story illustrates what I call invisible rules. These are habits and behaviors that have unnecessarily rigidified into rules. Although written rules can be resistant to change, invisible ones are more stubborn. They're the silent killers.

[Unit 07 – 10]

In school, there's one curriculum, one right way to study science, and one right formula that spits out the correct answer on a standardized test. Textbooks with grand titles like The Principles of Physics magically reveal "the principles" in three hundred pages. An authority figure then steps up to the lectern to feed us "the truth." As theoretical physicist David Gross explained in his Nobel lecture, textbooks often ignore the many alternate paths that people wandered down, the many false clues they followed, the many misconceptions they had. We learn about Newton's "laws" ― as if they arrived by a grand divine visitation or a stroke of genius ― but not the years he spent exploring, revising, and changing them. The laws that Newton failed to establish ― most notably his experiments in alchemy, which attempted, and spectacularly failed, to turn lead into gold ― don't make the cut as part of the one-dimensional story told in physics classrooms. Instead, our education system turns the life stories of these scientists from lead to gold.

[Unit 07 – 11]

If creators knew when they were on their way to fashioning a masterpiece, their work would progress only forward: they would halt their idea-generation efforts as they struck gold. But in fact, they backtrack, returning to versions that they had earlier discarded as inadequate. In Beethoven's most celebrated work, the Fifth Symphony, he scrapped the conclusion of the first movement because it felt too short, only to come back to it later. Had Beethoven been able to distinguish an extraordinary from an ordinary work, he would have accepted his composition immediately as a hit. When Picasso was painting his famous Guernica in protest of fascism, he produced 79 different drawings. Many of the images in the painting were based on his early sketches, not the later variations. If Picasso could judge his creations as he produced them, he would get consistently "warmer" and use the later drawings. But in reality, it was just as common that he got "colder."

[Unit 07 – 12]

Over the centuries various writers and thinkers, looking at humans from an outside perspective, have been struck by the theatrical quality of social life. The most famous quote expressing this comes from Shakespeare: All the world's a stage, / And all the men and women merely players; / They have their exits and their entrances, / And one man in his time plays many parts. If the theater and actors were traditionally represented by the image of masks, writers such as Shakespeare are implying that all of us are constantly wearing masks. Some people are better actors than others. Evil types such as Iago in the play Othello are able to conceal their hostile intentions behind a friendly smile. Others are able to act with more confidence and bravado - they often become leaders. People with excellent acting skills can better navigate our complex social environments and get ahead.

[Unit 08 - 학평 ANALYSIS]

The graph above shows the average number of students per teacher in public elementary and secondary schools across selected countries in 2019. Belgium was the only country with a smaller number of students per teacher than the OECD average in both public elementary and secondary schools. In both public elementary and secondary schools, the average number of students per teacher was the largest in Mexico. In public elementary schools, there was a smaller number of students per teacher on average in Germany than in Japan, whereas the reverse was true in public secondary schools. The average number of students per teacher in public secondary schools in Germany was less than half that in the United Kingdom. Of the five countries, Mexico was the only country with more students per teacher in public secondary schools than in public elementary schools.

[Unit 08 – 01]

The graph above shows the findings of a survey on the use of smart TVs to go online in the UK from 2013 to 2020, by gender. In each year from 2013 to 2020, the percentage of male respondents who used smart TVs to access the Internet was higher than that of female respondents. The percentage gap between the two genders was the largest in 2016 and in 2020, which both had an 8 percentage point difference. In 2020, the percentage of respondents who reported using smart TVs to go online was higher than 30% for both males and females. For male respondents, 2017 was the only year that saw a decrease in the percentage of those accessing the Internet via smart TVs compared to the previous year, during the given period. In 2014, the percentage of females using smart TVs to access the Internet was the lowest during the given period at 6%, and it was still below 10% in 2015.

[Unit 08 – 02]

The above graph shows how often German children and young adults read books in 2022 according to age groups. In each age group except 12 to 13‑year‑olds, those who said they read books once a month or less accounted for the largest proportion. Of the 12 to 13‑year‑old group, 42% stated they read daily or several times a week, which was the highest share within that group. In the 14 to 15‑year‑old group, the percentage of teenagers who read daily or several times a week was three times higher than that of those who never read a book in the same age group. In the 16 to 17‑year‑old group, those who read between once a week and once every two weeks were less than 20%. More than one fifth of the age group of 18 to 19 years responded that they never read any book.

[Unit 08 – 03]

The graph above shows the percentage of children who received second-dose measles vaccinations in six regions in 2000 and in 2020. The percentage of vaccinated children in the Western Pacific was lower than that of Europe in 2000, but the vaccination percentage in 2020 of the Western Pacific exceeded that of Europe by 3 percentage points. Among all regions, South-East Asia achieved the second biggest increase in its percentage of vaccinated children over the two decades, and it ranked third in the percentage of vaccinated children among the six regions in 2020. In the Eastern Mediterranean, the percentage of vaccinated children more than doubled from 2000 to 2020, but did not exceed that of the Americas in either year. The percentage of vaccinated children in the Americas was the highest among the six regions in 2000, but it increased the least of all regions over the two decades. In Africa, the percentage of children who received the vaccine in 2020 was more than seven times higher than in 2000, but was still the lowest among the six regions in 2020.

[Unit 08 – 04]

The above graph shows the distribution of oil demand by sector in the OECD in 2020. The Road transportation sector, which took up 48.6%, was the greatest oil demanding sector in the OECD member states. The percentage of oil demand in the Petrochemicals sector was one‐third that of the Road transportation sector. The difference in oil demand between the Other industry sector and the Petrochemicals sector was smaller than the difference in oil demand between the Aviation sector and the Electricity generation sector. The oil demand in the Residential, commercial and agricultural sector took up 9.8% of all oil demand in the OECD, which was the fourth largest among all the sectors. The percentage of oil demand in the Marine bunkers sector was twice that of the oil demand in the Rail & domestic waterways sector.

[Unit 08 – 05]

The above graph shows which modes of transportation people use for their daily commute to work, school, or university in five selected countries. In each of the five countries, the percentage of commuters using their own car is the highest among all three modes of transportation. The U.S. has the highest percentage of commuters using their own car among the five countries, but it has the lowest percentages for the other two modes of transportation. Public transport is the second most popular mode of transportation in all the countries except for the Netherlands. Among the five countries, France has the biggest gap between the percentage of commuters using their own car and that of commuters using public transport. In terms of commuters using public transport, Germany leads all of the countries, immediately followed by Australia.

[Unit 08 – 06]

The above table shows the share of respondents familiar with or engaged in e-sports in selected countries in 2020. Among the countries in the table, China was the country with the highest percentage both in e-sports familiarity and in e-sports engagement. When it comes to e-sports familiarity, Denmark showed a higher percentage than Indonesia, but the percentage of e-sports engagement in Denmark was lower than Indonesia's. The percentage of U.S. respondents familiar with e-sports was higher than that of Spanish respondents, and with e-sports engagement, the percentage in the U.S. was more than twice that of Spain. While the percentage of e-sports familiarity in Spain was higher than that in the UAE, the percentage of e-sports engagement in Spain was two percentage points lower than that in the UAE. As for e-sports familiarity, among the selected countries, the UAE and Iraq showed the lowest percentage, where fewer than a third of respondents in each country were familiar with e-sports.

[Unit 08 – 07]

The tables above show the number of Korean and foreign visitors to Korean palaces in 2018 and 2019. For the two-year period of 2018 to 2019, the overall total number of visitors to Deoksugung Palace was larger than that to Changgyeonggung Palace. While the total number of visitors to Changgyeonggung Palace decreased from 2018 to 2019, the total number of visitors to Deoksugung Palace increased during the same period. During both 2018 and 2019, the two palaces had more Korean visitors than foreign visitors. In 2018, the number of Korean visitors to Deoksugung Palace was less than half the number of Korean visitors to Changgyeonggung Palace. In 2019, the number of Korean visitors to Changgyeonggung Palace was more than 10 times the number of foreign visitors.

[Unit 08 – 08]

The above graph shows the average class size in primary education of five countries in 2005 and 2017. In every country except the UK, the average class size in 2017 decreased compared to that in 2005. In 2005, Korea's average class size was the largest of all the countries, with more than 30 students in a class. In 2017, however, Chile's average class size was the largest of all the countries, with fewer than 30 students in a class. In 2005, the average class size in Brazil was larger than that in the UK, whereas the reverse was true in 2017. In Greece, the average class size was fewer than 20 students in a class in both 2005 and 2017.

[Unit 08 – 09]

The above graph shows the percentage of commuters using eco-friendly transportation to get to work in six large cities in Canada in 2016. For all six given cities, the percentage of people who commuted by public transit was the highest, while the percentage of people who commuted by cycling was the lowest. The percentages of people who commuted by walking were the same in both Toronto and Montreal even though the percentages of people who commuted by public transit in those two cities were different. In Vancouver, the percentage of people who commuted by public transit was over ten times higher than that of people who commuted by cycling. Even though Ottawa ranked fourth in the percentage of people who commuted by public transit, this city was in first place in the percentage of people who commuted by walking or cycling. Compared with Calgary, Edmonton recorded lower percentages for all three given types of eco-friendly transportation.

[Unit 08 – 10]

The tables above show the materials landfilled as municipal waste in the U.S. in 2000 and 2017. The total amount of materials landfilled in 2017 was smaller than in 2000. While paper was the material most landfilled as municipal waste in 2000, plastics were the most landfilled material in 2017. In 2000, metals and wood were the third and fourth most landfilled materials, respectively, and this remained the same in 2017. More glass was landfilled than textiles in 2000, but more textiles were landfilled than glass in 2017. The amount of textiles landfilled in 2017 was more than twice that in 2000.

[Unit 08 – 11]

The graph above shows the amount of the electric car stock in five countries in 2014 and 2016. All five countries had more electric car stock in 2016 than in 2014. In 2014, the electric car stock of the United States ranked first among the five countries, followed by that of China. However, China showed the biggest increase of electric car stock from 2014 to 2016, surpassing the United States in electric car stock in 2016. Between 2014 and 2016, the increase in electric car stock in Japan was less than that in Norway. In the Netherlands, the electric car stock was more than three times larger in 2016 than in 2014.

[Unit 08 – 12]

The above graph shows the injury rate by day of game in the National Football League (NFL) from 2014 to 2017. The injury rate of Thursday games was the lowest in 2014 and the highest in 2017. The injury rate of Saturday, Sunday and Monday games decreased steadily from 2014 to 2017. In all the years except 2017, the injury rate of Thursday games was lower than that of Saturday, Sunday and Monday games. The gap between the injury rate of Thursday games and that of Saturday, Sunday and Monday games was the largest in 2014 and the smallest in 2017. In two years out of the four, the injury rate of Thursday games was higher than that of the 4-year total.

[Unit 09 - 학평 ANALYSIS]

Camille Flammarion was born at Montigny-le-Roi, France. He became interested in astronomy at an early age, and when he was only sixteen he wrote a book on the origin of the world. The manuscript was not published at the time, but it came to the attention of Urbain Le Verrier, the director of the Paris Observatory. He became an assistant to Le Verrier in 1858 and worked as a calculator. At nineteen, he wrote another book called The Plurality of Inhabited Worlds, in which he passionately claimed that life exists outside the planet Earth. His most successful work, Popular Astronomy, was published in 1880, and eventually sold 130,000 copies. With his own funds, he built an observatory at Juvisy and spent May to November of each year there. In 1887, he founded the French Astronomical Society and served as editor of its monthly publication.

[Unit 09 – 01]

Born in 1627 in Black Notley, Essex, England, John Ray was the son of the village blacksmith. At 16, he went to Cambridge University, where he studied widely and lectured on topics from Greek to mathematics, before joining the priesthood in 1660. To recover from an illness in 1650, he had taken to nature walks and developed an interest in botany. Accompanied by his wealthy student and supporter Francis Willughby, Ray toured Britain and Europe in the 1660s, studying and collecting plants and animals. He married Margaret Oakley in 1673 and, after leaving Willughby's household, lived quietly in Black Notley to the age of 77. He spent his later years studying samples in order to assemble plant and animal catalogues. He wrote more than twenty works on theology and his travels, as well as on plants and their form and function.

[Unit 09 – 02]

British photographer Julia Margaret Cameron is considered one of the greatest portrait photographers of the 19th century. Born in Calcutta, India, into a British family, Cameron was educated in France. Given a camera as a gift by her daughter in December 1863, she quickly and energetically devoted herself to the art of photography. She cleared out a chicken coop and converted it into studio space where she began to work as a photographer. Cameron made illustrative studio photographs, convincing friends and family members to pose for photographs, fitting them in theatrical costumes and carefully composing them into scenes. Criticized for her so‑called bad technique by art critics in her own time, she ignored convention and experimented with composition and focus. Later critics appreciated her valuing of spiritual depth over technical perfection and now consider her portraits to be among the finest expressions of the artistic possibilities of the medium.

[Unit 09 – 03]

Janaki Ammal, one of India's most notable scientists, was born in 1897, and was expected to wed through an arranged marriage. Despite living at a time when literacy among women in India was less than one percent, she decided to reject tradition and attend college. In 1924, she went to the U.S. and eventually received a doctorate in botany from the University of Michigan. Ammal contributed to the development of the sweetest sugarcane variety in the world. She moved to England where she co-authored the Chromosome Atlas of Cultivated Plants. Following a series of famines, she returned to India to help increase food production at the request of the Prime Minister. However, Ammal disagreed with the deforestation taking place in an effort to grow more food. She became an advocate for the preservation of native plants and successfully saved the Silent Valley from the construction of a hydroelectric dam.

[Unit 09 – 04]

Carl‐Gustaf Rossby was one of a group of notable Scandinavian researchers who worked with the Norwegian meteorologist Vilhelm Bjerknes at the University of Bergen. While growing up in Stockholm, Rossby received a traditional education. He earned a degree in mathematical physics at the University of Stockholm in 1918, but after hearing a lecture by Bjerknes, and apparently bored with Stockholm, he moved to the newly established Geophysical Institute in Bergen. In 1925, Rossby received a scholarship from the Sweden‐America Foundation to go to the United States, where he joined the United States Weather Bureau. Based in part on his practical experience in weather forecasting, Rossby had become a supporter of the "polar front theory," which explains the cyclonic circulation that develops at the boundary between warm and cold air masses. In 1947, Rossby accepted the chair of the Institute of Meteorology, which had been set up for him at the University of Stockholm, where he remained until his death ten years later.

[Unit 09 – 05]

The monarch butterfly has lovely bright colors splashed on its wings. The wings have white spots on the outer margins. The hind wings are rounded, and they are lighter in color than the front wings. The body is black with white spots. The mother butterfly lays only one egg on the underside of milkweed leaves, which hatches about three to five days later. The monarch loves to fly around in the warm sunshine, from March through October, all across the United States. The monarch cannot survive the cold winter temperatures of the northern states. So, it very wisely migrates from the northern states to the south, and hibernates. The monarch is the only insect that can fly more than four thousand kilometers to a warmer climate.

[Unit 09 – 06]

Gordon Parks was a photographer, author, film director, and musician. He documented the everyday lives of African Americans at a time when few people outside the black community were familiar with their lives. Parks was born the youngest of 15 children and grew up on his family's farm. After the death of his mother, he went to live with a sister in Minnesota. Parks eventually dropped out of school and worked at various jobs. His interest in photography was inspired by a photo-essay he read about migrant farm workers. After he moved to Chicago, Parks began taking photos of poor African Americans. In 1949, he became the first African American to be a staff photographer for Life magazine. He also wrote music pieces in his life and in 1956 the Vienna Orchestra performed a piano concerto he wrote. Parks was an inspiring artist until he died in 2006.

[Unit 09 – 07]

John Bowlby, British developmental psychologist and psychiatrist, was born in 1907, to an upper-middle-class family. His father, who was a member of the King's medical staff, was often absent. Bowlby was cared for primarily by a nanny and did not spend much time with his mother, as was customary at that time for his class. Bowlby was sent to a boarding school at the age of seven. He later recalled this as being traumatic to his development. This experience, however, proved to have a large impact on Bowlby, whose work focused on children's development. Following his father's suggestion, Bowlby enrolled at Trinity College, Cambridge to study medicine, but by his third year, he changed his focus to psychology. During the 1950s, Bowlby briefly worked as a mental health consultant for the World Health Organization. His attachment theory has been described as the dominant approach to understanding early social development.

[Unit 09 – 08]

Patricia Bath spent her life advocating for eye health. Born in 1942, she was raised in the Harlem area of New York City. She graduated from Howard University's College of Medicine in 1968. It was during her time as a medical intern that she saw that many poor people and Black people were becoming blind because of the lack of eye care. She decided to concentrate on ophthalmology, which is the branch of medicine that works with eye diseases and disorders. As her career progressed, Bath taught students in medical schools and trained other doctors. In 1976, she co-founded the American Institute for the Prevention of Blindness (AiPB) with the basic principle that "eyesight is a basic human right." In the 1980s, Bath began researching the use of lasers in eye treatments. Her research led to her becoming the first African-American female doctor to receive a patent for a medical device.

[Unit 09 – 09]

Born in 1895, Carol Ryrie Brink was orphaned by age 8 and raised by her grandmother. Her grandmother's life and storytelling abilities inspired her writing. She married Raymond Woodard Brink, a young mathematics professor she had met in Moscow, Idaho many years before. After their son and daughter were born, early in her career, she started to write children's stories and edited a yearly collection of short stories. She and her husband spent several years living in France, and her first novel Anything Can Happen on the River was published in 1934. After that, she wrote more than thirty fiction and nonfiction books for children and adults. She received the Newbery Award in 1936 for Caddie Woodlawn.

[Unit 09 – 10]

Alice Coachman was born in 1923, in Albany, Georgia, U.S.A. Since she was unable to access athletic training facilities because of the racism of the time, she trained using what was available to her, running barefoot along the dirt roads near her home and using homemade equipment to practice her jumping. Her talent in track and field was noticeable as early as elementary school. Coachman kept practicing hard and gained attention with her achievements in several competitions during her time in high school and college. In the 1948 London Olympics, Coachman competed in the high jump, reaching 5 feet, 6.5 inches, setting both an Olympic and an American record. This accomplishment made her the first black woman to win an Olympic gold medal. She is in nine different Halls of Fame, including the U.S. Olympic Hall of Fame. Coachman died in 2014, at the age of 90 in Georgia after she had dedicated her life to education.

[Unit 09 – 11]

Vera Rubin was born in 1928 in Philadelphia and grew up in Washington, D.C. It was in Washington, D.C. that she started to develop an interest in astronomy. She earned a master's degree from Cornell University in 1951 and a doctor's degree from Georgetown University in 1954. At the age of 22, she made headlines and shocked scientists with her theory about the motion of galaxies. In 1965, Rubin started as a researcher at the Carnegie Institution and became the first woman permitted to use the Hale Telescope. She made groundbreaking observations that provided evidence for the existence of a vast amount of dark matter in the universe. She won many prizes for her work, but never the Nobel Prize. She died in 2016 and is celebrated as someone who worked to lead the way for women in astronomy and physics.

[Unit 09 – 12]

The impala is one of the most graceful four‒legged animals. Impalas have the ability to adapt to different environments of the savannas. Both male and female impalas are similar in color, with white bellies and black‒tipped ears. Male impalas have long and pointed horns which can measure 90 centimeters in length. Female impalas have no horns. Impalas feed upon grass, fruits, and leaves from trees. When conditions are harsh in the dry season, they come together to search for food in mixed herds which can number as many as 100-200 individuals. The breeding season occurs at the end of the wet season around May. Females give birth in an isolated spot away from the herd. The average life span of an impala is between 13 and 15 years in the wild.

[Unit 11 - 학평 ANALYSIS]

Research psychologists often work with self-report data, made up of participants' verbal accounts of their behavior. This is the case whenever questionnaires, interviews, or personality inventories are used to measure variables. Self-report methods can be quite useful. They take advantage of the fact that people have a unique opportunity to observe themselves full-time. However, self-reports can be plagued by several kinds of distortion. One of the most problematic of these distortions is the social desirability bias, which is a tendency to give socially approved answers to questions about oneself. Subjects who are influenced by this bias work overtime trying to create a favorable impression, especially when subjects are asked about sensitive issues. For example, many survey respondents will report that they voted in an election or gave to a charity when in fact it is possible to determine that they did not.

[Unit 11 – 01]

There is little doubt that we are driven by the sell-by date. Once an item is past that date it goes into the waste stream, further increasing its carbon footprint. Remember those items have already travelled hundreds of miles to reach the shelves and once they go into waste they start a new carbon mile journey. But we all make our own judgement about sell-by dates; those brought up during the Second World War are often scornful of the terrible waste they believe such caution encourages. The manufacturer of the food has a view when making or growing something that by the time the product reaches the shelves it has already been travelling for so many days and possibly many miles. The manufacturer then decides that a product can reasonably be consumed within say 90 days and 90 days minus so many days for travelling gives the sell-by date. But whether it becomes toxic is something each individual can decide. It would seem to make sense not to buy large packs of perishable goods but non-perishable items may become cost-effective.

[Unit 11 – 02]

Human beings like certainty. This liking stems from our ancient ancestors who needed to survive alongside saber‑toothed tigers and poisonous berries. Our brains evolved to help us attend to threats, keep away from them, and remain alive afterward. In fact, we learned that the more certain we were about something, the better chance we had of making the right choice. Is this berry the same shape as last time? The same size? If I know for certain it is, my brain will direct me to eat it because I know it's safe. And if I'm uncertain, my brain will send out a danger alert to protect me. The dependence on certainty all those millennia ago ensured our survival to the present day, and the danger‑alert system continues to protect us. This is achieved by our brains labeling new, vague, or unpredictable everyday events and experiences as uncertain. Our brains then generate sensations, thoughts, and action plans to keep us safe from the uncertain element, and we live to see another day.

[Unit 11 – 03]

Pre-emption means that a strategy is designed to prevent a rival from starting some particular activity. In some case a pre-emptive move may simply be an announcement of some intent that might discourage rivals from doing the same. The idea of pre-emption implies that timing is sometimes very important ― a decision or an action at one point in time might be much more rewarding than doing it at a different time point. Pre-emption may involve up-weighting advertising for a period before and during when a new entrant launches into a market. The intent is to make it more difficult for the new entrant's advertising to make an impression on potential buyers. Product proliferation is another potential pre-emption strategy. The general idea is to launch a large variety of product variants so that there is very little in the way of market demand that is not accommodated. Arguably, if a market is already filled with product variants it is more difficult for competitors to find untapped pockets of market demand.

[Unit 11 – 04]

By noticing the relation between their own actions and resultant external changes, infants develop self‐efficacy, a sense that they are agents of the perceived changes. Although infants can notice the effect of their behavior on the physical environment, it is in early social interactions that infants most readily perceive the consequence of their actions. People have perceptual characteristics that virtually assure that infants will orient toward them. They have visually contrasting and moving faces. They produce sound, provide touch, and have interesting smells. In addition, people engage with infants by exaggerating their facial expressions and inflecting their voices in ways that infants find fascinating. But most importantly, these antics are responsive to infants' vocalizations, facial expressions, and gestures; people vary the pace and level of their behavior in response to infant actions. Consequentially, early social interactions provide a context where infants can easily notice the effect of their behavior.

[Unit 11 – 05]

Even though institutions like the World Bank use wealth to differentiate between "developed" and "developing" countries, they also agree that development is more than economic growth. Development can also include the social and environmental changes that are caused by or accompany economic growth, some of which are positive and thus may be negative. Awareness has grown ― and continues to grow ― that the question of how economic growth is affecting people and the planet needs to be addressed. Countries are slowly learning that it is cheaper and causes much less suffering to try to reduce the harmful effects of an economic activity or project at the beginning, when it is planned, than after the damage appears. To do this is not easy and is always imperfect. But an awareness of the need for such an effort indicates a greater understanding and moral concern than did the previous widespread attitude that focused only on creating new products and services.

[Unit 11 – 06]

Despite abundant warnings that we shouldn't measure ourselves against others, most of us still do. We're not only meaning-seeking creatures but social ones as well, constantly making interpersonal comparisons to evaluate ourselves, improve our standing, and enhance our self-esteem. But the problem with social comparison is that it often backfires. When comparing ourselves to someone who's doing better than we are, we often feel inadequate for not doing as well. This sometimes leads to what psychologists call malignant envy, the desire for someone to meet with misfortune ("I wish she didn't have what she has"). Also, comparing ourselves with someone who's doing worse than we are risks scorn, the feeling that others are something undeserving of our beneficence ("She's beneath my notice"). Then again, comparing ourselves to others can also lead to benign envy, the longing to reproduce someone else's accomplishments without wishing them ill ("I wish I had what she has"), which has been shown in some circumstances to inspire and motivate us to increase our efforts in spite of a recent failure.

[Unit 11 – 07]

Anchoring bias describes the cognitive error you make when you tend to give more weight to information arriving early in a situation compared to information arriving later ― regardless of the relative quality or relevance of that initial information. Whatever data is presented to you first when you start to look at a situation can form an "anchor" and it becomes significantly more challenging to alter your mental course away from this anchor than it logically should be. A classic example of anchoring bias in emergency medicine is "triage bias," where whatever the first impression you develop, or are given, about a patient tends to influence all subsequent providers seeing that patient. For example, imagine two patients presenting for emergency care with aching jaw pain that occasionally extends down to their chest. Differences in how the intake providers label the chart ― "jaw pain" vs. "chest pain," for example ― create anchors that might result in significant differences in how the patients are treated.

[Unit 11 – 08]

Organisms living in the deep sea have adapted to the high pressure by storing water in their bodies, some consisting almost entirely of water. Most deep-sea organisms lack gas bladders. They are cold-blooded organisms that adjust their body temperature to their environment, allowing them to survive in the cold water while maintaining a low metabolism. Many species lower their metabolism so much that they are able to survive without food for long periods of time, as finding the sparse food that is available expends a lot of energy. Many predatory fish of the deep sea are equipped with enormous mouths and sharp teeth, enabling them to hold on to prey and overpower it. Some predators hunting in the residual light zone of the ocean have excellent visual capabilities, while others are able to create their own light to attract prey or a mating partner.

[Unit 11 – 09]

While working as a research fellow at Harvard, B. F. Skinner carried out a series of experiments on rats, using an invention that later became known as a "Skinner box." A rat was placed in one of these boxes, which had a special bar fitted on the inside. Every time the rat pressed this bar, it was presented with food. The rate of bar‑pressing was automatically recorded. Initially, the rat might press the bar accidentally, or simply out of curiosity, and as a consequence receive some food. Over time, the rat learned that food appeared whenever the bar was pressed, and began to press it purposefully in order to be fed. Comparing results from rats given the "positive reinforcement" of food for their bar‑pressing behavior with those that were not, or were presented with food at different rates, it became clear that when food appeared as a consequence of the rat's actions, this influenced its future behavior.

[Unit 11 – 10]

One of the keys to insects' successful survival in the open air lies in their outer covering ― a hard waxy layer that helps prevent their tiny bodies from dehydrating. To take oxygen from the air, they use narrow breathing holes in the body-segments, which take in air passively and can be opened and closed as needed. Instead of blood contained in vessels, they have free-flowing hemolymph, which helps keep their bodies rigid, aids movement, and assists the transportation of nutrients and waste materials to the appropriate parts of the body. The nervous system is modular ― in a sense, each of the body segments has its own individual and autonomous brain ― and some other body systems show a similar modularization. These are just a few of the many ways in which insect bodies are structured and function completely differently from our own.

[Unit 11 – 11]

All social interactions require some common ground upon which the involved parties can coordinate their behavior. In the interdependent groups in which humans and other primates live, individuals must have even greater common ground to establish and maintain social relationships. This common ground is morality. This is why morality often is defined as a shared set of standards for judging right and wrong in the conduct of social relationships. No matter how it is conceptualized ― whether as trustworthiness, cooperation, justice, or caring ― morality is always about the treatment of people in social relationships. This is likely why there is surprising agreement across a wide range of perspectives that a shared sense of morality is necessary to social relations. Evolutionary biologists, sociologists, and philosophers all seem to agree with social psychologists that the interdependent relationships within groups that humans depend on are not possible without a shared morality.

[Unit 11 – 12]

Every farmer knows that the hard part is getting the field prepared. Inserting seeds and watching them grow is easy. In the case of science and industry, the community prepares the field, yet society tends to give all the credit to the individual who happens to plant a successful seed. Planting a seed does not necessarily require overwhelming intelligence; creating an environment that allows seeds to prosper does. We need to give more credit to the community in science, politics, business, and daily life. Martin Luther King Jr. was a great man. Perhaps his greatest strength was his ability to inspire people to work together to achieve, against all odds, revolutionary changes in society's perception of race and in the fairness of the law. But to really understand what he accomplished requires looking beyond the man. Instead of treating him as the manifestation of everything great, we should appreciate his role in allowing America to show that it can be great.

[Unit 12 - 학평 ANALYSIS]

Robert Blattberg and Steven Hoch noted that, in a changing environment, it is not clear that consistency is always a virtue and that one of the advantages of human judgment is the ability to detect change. Thus, in changing environments, it might be advantageous to combine human judgment and statistical models. Blattberg and Hoch examined this possibility by having supermarket managers forecast demand for certain products and then creating a composite forecast by averaging these judgments with the forecasts of statistical models based on past data. The logic was that statistical models assume stable conditions and therefore cannot account for the effects on demand of novel events such as actions taken by competitors or the introduction of new products. Humans, however, can incorporate these novel factors in their judgments. The composite ─ or average of human judgments and statistical models ─ proved to be more accurate than either the statistical models or the managers working alone.

[Unit 12 – 01]

The "jolt" of caffeine does wear off. Caffeine is removed from your system by an enzyme within your liver, which gradually degrades it over time. Based in large part on genetics, some people have a more efficient version of the enzyme that degrades caffeine, allowing the liver to rapidly clear it from the bloodstream. These rare individuals can drink an espresso with dinner and fall fast asleep at midnight without a problem. Others, however, have a slower-acting version of the enzyme. It takes far longer for their system to eliminate the same amount of caffeine. As a result, they are very sensitive to caffeine's effects. One cup of tea or coffee in the morning will last much of the day, and should they have a second cup, even early in the afternoon, they will find it difficult to fall asleep in the evening. Aging also alters the speed of caffeine clearance: the older we are, the longer it takes our brain and body to remove caffeine, and thus the more sensitive we become in later life to caffeine's sleep-disrupting influence.

[Unit 12 – 02]

Over the past several decades, there have been some agreements to reduce the debt of poor nations, but other economic challenges (like trade barriers) remain. Nontariff trade measures, such as quotas, subsidies, and restrictions on exports, are increasingly prevalent and may be enacted for policy reasons having nothing to do with trade. However, they have a discriminatory effect on exports from countries that lack the resources to comply with requirements of nontariff measures imposed by rich nations. For example, the huge subsidies that rich nations give to their farmers make it very difficult for farmers in the rest of the world to compete with them. Another example would be domestic health or safety regulations, which, though not specifically targeting imports, could impose significant costs on foreign manufacturers seeking to conform to the importer's market. Industries in developing markets may have more difficulty absorbing these additional costs.

[Unit 12 – 03]

Countershading is the process of optical flattening that provides camouflage to animals. When sunlight illuminates an object from above, the object will be brightest on top. The color of the object will gradually shade darker toward the bottom. This shading gives the object depth and allows the viewer to distinguish its shape. Thus even if an animal is exactly, but uniformly, the same color as the substrate, it will be easily visible when illuminated. Most animals, however, are darker above than they are below. When they are illuminated from above, the darker back is lightened and the lighter belly is shaded. The animal thus appears to be a single color and easily blends in with the substrate. This pattern of coloration, or countershading, destroys the visual impression of shape in the organism. It allows the animal to blend in with its background.

[Unit 12 – 04]

Adam Smith pointed out that specialization, where each of us focuses on one specific skill, leads to a general improvement of everybody's well‐being. The idea is simple and powerful. By specializing in just one activity ― such as food raising, clothing production, or home construction ― each worker gains mastery over the particular activity. Specialization makes sense, however, only if the specialist can subsequently trade his or her output with the output of specialists in other lines of activity. It would make no sense to produce more food than a household needs unless there is a market outlet to exchange that excess food for clothing, shelter, and so forth. At the same time, without the ability to buy food on the market, it would not be possible to be a specialist home builder or clothing maker, since it would be necessary to farm for one's own survival. Thus Smith realized that the division of labor is limited by the extent of the market, whereas the extent of the market is determined by the degree of specialization.

[Unit 12 – 05]

The most advanced military jets are fly‑by‑wire: They are so unstable that they require an automated system that can sense and act more quickly than a human operator to maintain control. Our dependence on smart technology has led to a paradox. As technology improves, it becomes more reliable and more efficient, and human operators depend on it even more. Eventually they lose focus, become distracted, and check out, leaving the system to run on its own. In the most extreme case, piloting a massive airliner could become a passive occupation, like watching TV. This is fine until something unexpected happens. The unexpected reveals the value of humans; what we bring to the table is the flexibility to handle new situations. Machines aren't collaborating in pursuit of a joint goal; they are merely serving as tools. So when the human operator gives up oversight, the system is more likely to have a serious accident.

[Unit 12 – 06]

What exactly does normal science involve? According to Thomas Kuhn it is primarily a matter of puzzle-solving. However successful a paradigm is, it will always encounter certain problems ― phenomena which it cannot easily accommodate, or mismatches between the theory's predictions and the experimental facts. The job of the normal scientist is to try to eliminate these minor puzzles while making as few changes as possible to the paradigm. So normal science is a conservative activity - its practitioners are not trying to make any earth-shattering discoveries, but rather just to develop and extend the existing paradigm. In Kuhn's words, 'normal science does not aim at novelties of fact or theory, and when successful finds none'. Above all, Kuhn stressed that normal scientists are not trying to test the paradigm. On the contrary, they accept the paradigm unquestioningly, and conduct their research within the limits it sets. If a normal scientist gets an experimental result which conflicts with the paradigm, they will usually assume that their experimental technique is faulty, not that the paradigm is wrong.

[Unit 12 – 07]

In order for us to be able to retain valuable pieces of information, our brain has to forget in a manner that is both targeted and controlled. Can you recall, for example, your very first day of school? You most likely have one or two noteworthy images in your head, such as putting your crayons and pencils into your pencil case. But that's probably the extent of the specifics. Those additional details that are apparently unimportant are actively deleted from your brain the more you go about remembering the situation. The reason for this is that the brain does not consider it valuable to remember all of the details as long as it is able to convey the main message (i.e., your first day of school was great). In fact, studies have shown that the brain actively controls regions responsible for insignificant or minor memory content that tends to disturb the main memory. Over time, the minor details vanish more and more, though this in turn serves to sharpen the most important messages of the past.

[Unit 12 – 08]

Human innovation in agriculture has unlocked modifications in apples, tulips, and potatoes that never would have been realized through a plant's natural reproductive cycles. This cultivation process has created some of the recognizable vegetables and fruits consumers look for in their grocery stores. However, relying on only a few varieties of cultivated crops can leave humankind vulnerable to starvation and agricultural loss if a harvest is destroyed. For example, a million people died over the course of three years during the Irish potato famine because the Irish relied primarily on potatoes and milk to create a nutritionally balanced meal. In order to continue its symbiotic relationship with cultivated plants, humanity must allow for biodiversity and recognize the potential drawbacks that monocultures of plants can introduce. Planting seeds of all kinds, even if they don't seem immediately useful or profitable, can ensure the longevity of those plants for generations to come. A balance must be struck between nature's capacity for wildness and humanity's desire for control.

[Unit 12 – 09]

The objective point of view is illustrated by John Ford's "philosophy of camera." Ford considered the camera to be a window and the audience to be outside the window viewing the people and events within. We are asked to watch the actions as if they were taking place at a distance, and we are not asked to participate. The objective point of view employs a static camera as much as possible in order to produce this window effect, and it concentrates on the actors and the action without drawing attention to the camera. The objective camera suggests an emotional distance between camera and subject; the camera seems simply to be recording, as straightforwardly as possible, the characters and actions of the story. For the most part, the director uses natural, normal types of camera positioning and camera angles. The objective camera does not comment on or interpret the action but merely records it, letting it unfold. We see the action from the viewpoint of an impersonal observer. If the camera moves, it does so unnoticeably, calling as little attention to itself as possible.

[Unit 12 – 10]

On projects in the built environment, people consider safety and functionality nonnegotiable. But the aesthetics of a new project ― how it is designed ― is too often considered irrelevant. The question of how its design affects human beings is rarely asked. People think that design makes something highfalutin, called architecture, and that architecture differs from building, just as surely as the Washington National Cathedral differs from the local community church. This distinction between architecture and building ― or more generally, between design and utility ― couldn't be more wrong. More and more we are learning that the design of all our built environments matters so profoundly that safety and functionality must not be our only urgent priorities. All kinds of design elements influence people's experiences, not only of the environment but also of themselves. They shape our cognitions, emotions, and actions, and even our well-being. They actually help constitute our very sense of identity.

[Unit 12 – 11]

Spine-tingling ghost stories are fun to tell if they are really scary, and even more so if you claim that they are true. People get a thrill from passing on those stories. The same applies to miracle stories. If a rumor of a miracle gets written down in a book, the rumor becomes hard to challenge, especially if the book is ancient. If a rumor is old enough, it starts to be called a "tradition" instead, and then people believe it all the more. This is rather odd because you might think they would realize that older rumors have had more time to get distorted than younger rumors that are close in time to the alleged events themselves. Elvis Presley and Michael Jackson lived too recently for traditions to have grown up, so not many people believe stories like "Elvis seen on Mars."

[Unit 12 – 12]

Sudden success or winnings can be very dangerous. Neurologically, chemicals are released in the brain that give a powerful burst of excitement and energy, leading to the desire to repeat this experience. It can be the start of any kind of addiction or manic behavior. Also, when gains come quickly we tend to lose sight of the basic wisdom that true success, to really last, must come through hard work. We do not take into account the role that luck plays in such sudden gains. We try again and again to recapture that high from winning so much money or attention. We acquire feelings of superiority. We become especially resistant to anyone who tries to warn us- they don't understand, we tell ourselves. Because this cannot be sustained, we experience an inevitable fall, which is all the more painful, leading to the depression part of the cycle. Although gamblers are the most prone to this, it equally applies to business people during bubbles and to people who gain sudden attention from the public.

[Unit 13 - 학평 ANALYSIS]

Rebels may think they're rebels, but clever marketers influence them just like the rest of us. Saying, "Everyone is doing it" may turn some people off from an idea. These people will look for alternatives, which (if cleverly planned) can be exactly what a marketer or persuader wants you to believe. If I want you to consider an idea, and know you strongly reject popular opinion in favor of maintaining your independence and uniqueness, I would present the majority option first, which you would reject in favor of my actual preference. We are often tricked when we try to maintain a position of defiance. People use this reversal to make us "independently" choose an option which suits their purposes. Some brands have taken full effect of our defiance towards the mainstream and positioned themselves as rebels; which has created even stronger brand loyalty.

[Unit 13 – 01]

In the course of his research on business strategy and the environment, Michael Porter noticed a peculiar pattern: Businesses seemed to be profiting from regulation. He also discovered that the stricter regulations were prompting more innovation than the weaker ones. The Dutch flower industry provides an illustration. For many years, the companies producing Holland's world-renowned tulips and other cut flowers were also contaminating the country's water and soil with fertilizers and pesticides. In 1991, the Dutch government adopted a policy designed to cut pesticide use in half by 2000 ― a goal they ultimately achieved. Facing increasingly strict regulation, greenhouse growers realized they had to develop new methods if they were going to maintain product quality with fewer pesticides. In response, they shifted to a cultivation method that circulates water in closed-loop systems and grows flowers in a rock wool substrate. The new system not only reduced the pollution released into the environment; it also increased profits by giving companies greater control over growing conditions.

[Unit 13 – 02]

It's hard to pay more for the speedy but highly skilled person, simply because there's less effort being observed. Two researchers once did a study in which they asked people how much they would pay for data recovery. They found that people would pay a little more for a greater quantity of rescued data, but what they were most sensitive to was the number of hours the technician worked. When the data recovery took only a few minutes, willingness to pay was low, but when it took more than a week to recover the same amount of data, people were willing to pay much more. Think about it: They were willing to pay more for the slower service with the same outcome. Fundamentally, when we value effort over outcome, we're paying for incompetence. Although it is actually irrational, we feel more rational, and more comfortable, paying for incompetence.

[Unit 13 – 03]

Free play is nature's means of teaching children that they are not helpless. In play, away from adults, children really do have control and can practice asserting it. In free play, children learn to make their own decisions, solve their own problems, create and follow rules, and get along with others as equals rather than as obedient or rebellious subordinates. In active outdoor play, children deliberately dose themselves with moderate amounts of fear and they thereby learn how to control not only their bodies, but also their fear. In social play children learn how to negotiate with others, how to please others, and how to manage and overcome the anger that can arise from conflicts. None of these lessons can be taught through verbal means; they can be learned only through experience, which free play provides.

[Unit 13 – 04]

No learning is possible without an error signal. Organisms only learn when events violate their expectations. In other words, surprise is one of the fundamental drivers of learning. Imagine hearing a series of identical notes, AAAAA. Each note draws out a response in the auditory areas of your brain ― but as the notes repeat, those responses progressively decrease. This is called "adaptation," a deceptively simple phenomenon that shows that your brain is learning to anticipate the next event. Suddenly, the note changes: AAAAA#. Your primary auditory cortex immediately shows a strong surprise reaction: not only does the adaptation fade away, but additional neurons begin to vigorously fire in response to the unexpected sound. And it is not just repetition that leads to adaptation: what matters is whether the notes are predictable. For instance, if you hear an alternating set of notes, such as ABABA, your brain gets used to this alternation, and the activity in your auditory areas again decreases. This time, however, it is an unexpected repetition, such as ABABB, that triggers a surprise response.

[Unit 13 – 05]

It is not the peasant's goal to produce the highest possible time‐averaged crop yield, averaged over many years. If your time‐averaged yield is marvelously high as a result of the combination of nine great years and one year of crop failure, you will still starve to death in that one year of crop failure before you can look back to congratulate yourself on your great time-averaged yield. Instead, the peasant's aim is to make sure to produce a yield above the starvation level in every single year, even though the time-averaged yield may not be highest. That's why field scattering may make sense. If you have just one big field, no matter how good it is on the average, you will starve when the inevitable occasional year arrives in which your one field has a low yield. But if you have many different fields, varying independently of each other, then in any given year some of your fields will produce well even when your other fields are producing poorly.

[Unit 13 – 06]

Followers can be defined by their position as subordinates or by their behavior of going along with leaders' wishes. But followers also have power to lead. Followers empower leaders as well as vice versa. This has led some leadership analysts like Ronald Heifetz to avoid using the word followers and refer to the others in a power relationship as "citizens" or "constituents." Heifetz is correct that too simple a view of followers can produce misunderstanding. In modern life, most people wind up being both leaders and followers, and the categories can become quite fluid. Our behavior as followers changes as our objectives change. If I trust your judgment in music more than my own, I may follow your lead on which concert we attend (even though you may be formally my subordinate in position). But if I am an expert on fishing, you may follow my lead on where we fish, regardless of our formal positions or the fact that I followed your lead on concerts yesterday.

[Unit 13 – 07]

Around the boss, you will always find people coming across as friends, good subordinates, or even great sympathizers. But some do not truly belong. One day, an incident will blow their cover, and then you will know where they truly belong. When it is all cosy and safe, they will be there, loitering the corridors and fawning at the slightest opportunity. But as soon as difficulties arrive, they are the first to be found missing. And difficult times are the true test of loyalty. Dr. Martin Luther King said, "The ultimate test of a man is not where he stands in moments of comfort and convenience, but where he stands at times of challenge and controversy." And so be careful of friends who are always eager to take from you but reluctant to give back even in their little ways. If they lack the commitment to sail with you through difficult weather, then they are more likely to abandon your ship when it stops.

[Unit 13 – 08]

When you're driving a car, your memory of how to operate the vehicle comes from one set of brain cells; the memory of how to navigate the streets to get to your destination springs from another set of neurons; the memory of driving rules and following street signs originates from another family of brain cells; and the thoughts and feelings you have about the driving experience itself, including any close calls with other cars, come from yet another group of cells. You do not have conscious awareness of all these separate mental plays and cognitive neural firings, yet they somehow work together in beautiful harmony to synthesize your overall experience. In fact, we don't even know the real difference between how we remember and how we think. But, we do know they are strongly intertwined. That is why truly improving memory can never simply be about using memory tricks, although they can be helpful in strengthening certain components of memory. Here's the bottom line: To improve and preserve memory at the cognitive level, you have to work on all functions of your brain.

[Unit 13 – 09]

The elements any particular animal needs are relatively predictable. They are predictable based on the past: what an animal's ancestors needed is likely to be what that animal also needs. Taste preferences, therefore, can be hardwired. Consider sodium (Na). The bodies of terrestrial vertebrates, including those of mammals, tend to have a concentration of sodium nearly fifty times that of the primary producers on land, plants. This is, in part, because vertebrates evolved in the sea and so evolved cells dependent upon the ingredients that were common in the sea, including sodium. To remedy the difference between their needs for sodium and that available in plants, herbivores can eat fifty times more plant material than they otherwise need (and eliminate the excess). Or they can seek out other sources of sodium. The salt taste receptor rewards animals for doing the latter, seeking out salt in order to satisfy their great need.

[Unit 13 – 10]

Philosophical activity is based on the recognition of ignorance. The philosopher's thirst for knowledge is shown through attempts to find better answers to questions even if those answers are never found. At the same time, a philosopher also knows that being too sure can hinder the discovery of other and better possibilities. In a philosophical dialogue, the participants are aware that there are things they do not know or understand. The goal of the dialogue is to arrive at a conception that one did not know or understand beforehand. In traditional schools, where philosophy is not present, students often work with factual questions, they learn specific content listed in the curriculum, and they are not required to solve philosophical problems. However, we know that awareness of what one does not know can be a good way to acquire knowledge. Knowledge and understanding are developed through thinking and talking. Putting things into words makes things clearer. Therefore, students must not be afraid of saying something wrong or talking without first being sure that they are right.

[Unit 13 – 11]

The tendency for one purchase to lead to another one has a name: the Diderot Effect. The Diderot Effect states that obtaining a new possession often creates a spiral of consumption that leads to additional purchases. You can spot this pattern everywhere. You buy a dress and have to get new shoes and earrings to match. You buy a toy for your child and soon find yourself purchasing all of the accessories that go with it. It's a chain reaction of purchases. Many human behaviors follow this cycle. You often decide what to do next based on what you have just finished doing. Going to the bathroom leads to washing and drying your hands, which reminds you that you need to put the dirty towels in the laundry, so you add laundry detergent to the shopping list, and so on. No behavior happens in isolation. Each action becomes a cue that triggers the next behavior.

[Unit 13 – 12]

Even the most respectable of all musical institutions, the symphony orchestra, carries inside its DNA the legacy of the hunt. The various instruments in the orchestra can be traced back to these primitive origins ─ their earliest forms were made either from the animal (horn, hide, gut, bone) or the weapons employed in bringing the animal under control (stick, bow). Are we wrong to hear this history in the music itself, in the formidable aggression and awe-inspiring assertiveness of those monumental symphonies that remain the core repertoire of the world's leading orchestras? Listening to Beethoven, Brahms, Mahler, Bruckner, Berlioz, Tchaikovsky, Shostakovich, and other great composers, I can easily summon up images of bands of men starting to chase animals, using sound as a source and symbol of dominance, an expression of the will to predatory power.

[Unit 13 – 13]

Over 4.5 billion years ago, the Earth's primordial atmosphere was probably largely water vapour, carbon dioxide, sulfur dioxide and nitrogen. The appearance and subsequent evolution of exceedingly primitive living organisms (bacteria-like microbes and simple single-celled plants) began to change the atmosphere, liberating oxygen and breaking down carbon dioxide and sulfur dioxide. This made it possible for higher organisms to develop. When the earliest known plant cells with nuclei evolved about 2 billion years ago, the atmosphere seems to have had only about 1 percent of its present content of oxygen. With the emergence of the first land plants, about 500 million years ago, oxygen reached about one-third of its present concentration. It had risen to almost its present level by about 370 million years ago, when animals first spread on to land. Today's atmosphere is thus not just a requirement to sustain life as we know it ― it is also a consequence of life.

[Unit 13 – 14]

Firms in almost every industry tend to be clustered. Suppose you threw darts at random on a map of the United States. You'd find the holes left by the darts to be more or less evenly distributed across the map. But the real map of any given industry looks nothing like that; it looks more as if someone had thrown all the darts in the same place. This is probably in part because of reputation; buyers may be suspicious of a software firm in the middle of the cornfields. It would also be hard to recruit workers if every time you needed a new employee you had to persuade someone to move across the country, rather than just poach one from your neighbor. There are also regulatory reasons: zoning laws often try to concentrate dirty industries in one place and restaurants and bars in another. Finally, people in the same industry often have similar preferences (computer engineers like coffee, financiers show off with expensive bottles of wine). Concentration makes it easier to provide the amenities they like.

[Unit 13 – 15]

When is the right time for the predator to consume the fruit? The plant uses the color of the fruit to signal to predators that it is ripe, which means that the seed's hull has hardened ─ and therefore the sugar content is at its height. Incredibly, the plant has chosen to manufacture fructose, instead of glucose, as the sugar in the fruit. Glucose raises insulin levels in primates and humans, which initially raises levels of leptin, a hunger‒blocking hormone ─ but fructose does not. As a result, the predator never receives the normal message that it is full. That makes for a win‒win for predator and prey. The animal obtains more calories, and because it keeps eating more and more fruit and therefore more seeds, the plant has a better chance of distributing more of its babies.

[Unit 13 – 16]

We are often faced with high‒level decisions, where we are unable to predict the results of those decisions. In such situations, most people end up quitting the option altogether, because the stakes are high and results are very unpredictable. But there is a solution for this. You should use the process of testing the option on a smaller scale. In many situations, it's wise to dip your toe in the water rather than dive in headfirst. Recently, I was about to enroll in an expensive coaching program. But I was not fully convinced of how the outcome would be. Therefore, I used this process by enrolling in a low‒cost mini course with the same instructor. This helped me understand his methodology, style, and content; and I was able to test it with a lower investment, and less time and effort before committing fully to the expensive program.

[Unit 14 - 학평 ANALYSIS]

Many people look for safety and security in popular thinking. They figure that if a lot of people are doing something, then it must be right. It must be a good idea. If most people accept it, then it probably represents fairness, equality, compassion, and sensitivity, right? Not necessarily. Popular thinking said the earth was the center of the universe, yet Copernicus studied the stars and planets and proved mathematically that the earth and the other planets in our solar system revolved around the sun. Popular thinking said surgery didn't require clean instruments, yet Joseph Lister studied the high death rates in hospitals and introduced antiseptic practices that immediately saved lives. Popular thinking said that women shouldn't have the right to vote, yet people like Emmeline Pankhurst and Susan B. Anthony fought for and won that right. We must always remember there is a huge difference between acceptance and intelligence. People may say that there's safety in numbers, but that's not always true.

[Unit 14 – 01]

As always happens with natural selection, bats and their prey have been engaged in a life-or-death sensory arms race for millions of years. It's believed that hearing in moths arose specifically in response to the threat of being eaten by bats. (Not all insects can hear.) Over millions of years, moths have evolved the ability to detect sounds at ever higher frequencies, and, as they have, the frequencies of bats' vocalizations have risen, too. Some moth species have also evolved scales on their wings and a fur-like coat on their bodies; both act as "acoustic camouflage," by absorbing sound waves in the frequencies emitted by bats, thereby preventing those sound waves from bouncing back. The B-2 bomber and other "stealth" aircraft have fuselages made of materials that do something similar with radar beams.

[Unit 14 – 02]

In adolescence many of us had the experience of falling under the sway of a great book or writer. We became entranced by the novel ideas in the book, and because we were so open to influence, these early encounters with exciting ideas sank deeply into our minds and became part of our own thought processes, affecting us decades after we absorbed them. Such influences enriched our mental landscape, and in fact our intelligence depends on the ability to absorb the lessons and ideas of those who are older and wiser. Just as the body tightens with age, however, so does the mind. And just as our sense of weakness and vulnerability motivated the desire to learn, so does our creeping sense of superiority slowly close us off to new ideas and influences. Some may advocate that we all become more skeptical in the modern world, but in fact a far greater danger comes from the increasing closing of the mind that burdens us as individuals as we get older, and seems to be burdening our culture in general.

[Unit 14 – 03]

The connectedness of the global economic market makes it vulnerable to potential "infection." A financial failure can make its way from borrowers to banks to insurers, spreading like a flu. However, there are unexpected characteristics when it comes to such infection in the market. Infection can occur even without any contact. A bank might become insolvent even without having any of its investments fail. Fear and uncertainty can be damaging to financial markets, just as cascading failures due to bad investments. If we all woke up tomorrow and believed that Bank X would be insolvent, then it would become insolvent. In fact, it would be enough for us to fear that others believed that Bank X was going to fail, or just to fear our collective fear! We might all even know that Bank X was well-managed with healthy investments, but if we expected others to pull their money out, then we would fear being the last to pull our money out. Financial distress can be self-fulfilling and is a particularly troublesome aspect of financial markets.

[Unit 14 – 04]

Observational studies of humans cannot be properly controlled. Humans live different lifestyles and in different environments. Thus, they are insufficiently homogeneous to be suitable experimental subjects. These confounding factors undermine our ability to draw sound causal conclusions from human epidemiological surveys. Confounding factors are variables (known or unknown) that make it difficult for epidemiologists to isolate the effects of the specific variable being studied. For example, Taubes argued that since many people who drink also smoke, researchers have difficulty determining the link between alcohol consumption and cancer. Similarly, researchers in the famous Framingham study identified a significant correlation between coffee drinking and coronary heart disease. However, most of this correlation disappeared once researchers corrected for the fact that many coffee drinkers also smoke. If the confounding factors are known, it is often possible to correct for them. However, if they are unknown, they will undermine the reliability of the causal conclusions we draw from epidemiological surveys.

[Unit 14 – 05]

As well as making sense of events through narratives, historians in the ancient world established the tradition of history as a source of moral lessons and reflections. The history writing of Livy or Tacitus, for instance, was in part designed to examine the behavior of heroes and villains, meditating on the strengths and weaknesses in the characters of emperors and generals, providing exemplars for the virtuous to imitate or avoid. This continues to be one of the functions of history. French chronicler Jean Froissart said he had written his accounts of chivalrous knights fighting in the Hundred Years' War "so that brave men should be inspired thereby to follow such examples." Today, historical studies of Lincoln, Churchill, Gandhi, or Martin Luther King, Jr. perform the same function.

[Unit 14 – 06]

What is unusual about journalism as a profession is its lack of independence. In theory, practitioners in the classic professions, like medicine or the clergy, contain the means of production in their heads and hands, and therefore do not have to work for a company or an employer. They can draw their income directly from their clients or patients. Because the professionals hold knowledge, moreover, their clients are dependent on them. Journalists hold knowledge, but it is not theoretical in nature; one might argue that the public depends on journalists in the same way that patients depend on doctors, but in practice a journalist can serve the public usually only by working for a news organization, which can fire her or him at will. Journalists' income depends not on the public, but on the employing news organization, which often derives the large majority of its revenue from advertisers.

[Unit 14 – 07]

According to many philosophers, there is a purely logical reason why science will never be able to explain everything. For in order to explain something, whatever it is, we need to invoke something else. But what explains the second thing? To illustrate, recall that Newton explained a diverse range of phenomena using his law of gravity. But what explains the law of gravity itself? If someone asks why all bodies exert a gravitational attraction on each other, what should we tell them? Newton had no answer to this question. In Newtonian science the law of gravity was a fundamental principle: it explained other things, but could not itself be explained. The moral generalizes. However much the science of the future can explain, the explanations it gives will have to make use of certain fundamental laws and principles. Since nothing can explain itself, it follows that at least some of these laws and principles will themselves remain unexplained.

[Unit 14 – 08]

In one example of the important role of laughter in social contexts, Devereux and Ginsburg examined frequency of laughter in matched pairs of strangers or friends who watched a humorous video together compared to those who watched it alone. The time individuals spent laughing was nearly twice as frequent in pairs as when alone. Frequency of laughing was only slightly shorter for friends than strangers. According to Devereux and Ginsburg, laughing with strangers served to create a social bond that made each person in the pair feel comfortable. This explanation is supported by the fact that in their stranger condition, when one person laughed, the other was likely to laugh as well. Interestingly, the three social conditions (alone, paired with a stranger, or paired with a friend) did not differ in their ratings of funniness of the video or of feelings of happiness or anxiousness. This finding implies that their frequency of laughter was not because we find things funnier when we are with others but instead we are using laughter to connect with others.

[Unit 14 – 09]

One vivid example of how a market mindset can transform and undermine an institution is given by Dan Ariely in his book Predictably Irrational. He tells the story of a day care center in Israel that decided to fine parents who arrived late to pick up their children, in the hope that this would discourage them from doing so. In fact, the exact opposite happened. Before the imposition of fines, parents felt guilty about arriving late, and guilt was effective in ensuring that only a few did so. Once a fine was introduced, it seems that in the minds of the parents the entire scenario was changed from a social contract to a market one. Essentially, they were paying for the center to look after their children after hours. Some parents thought it worth the price, and the rate of late arrivals increased. Significantly, once the center abandoned the fines and went back to the previous arrangement, late arrivals remained at the high level they had reached during the period of the fines.

[Unit 14 – 10]

When self‑handicapping, you're engaging in behaviour that you know will harm your chances of succeeding: You know that you won't do as well on the test if you go out the night before, but you do it anyway. Why would anyone intentionally harm their chances of success? Well, here's a possible answer. Say that you do study hard. You go to bed at a decent time and get eight hours of sleep. Then you take the maths test, but don't do well: you only get a C. What can you conclude about yourself? Probably that you're just not good at maths, which is a pretty hard blow to your self‑esteem. But if you self‑handicap, you'll never be in this position because you're creating a reason for your failure. You were bound to get a C, you can tell yourself, because you went out till 1 a.m. That C doesn't mean that you're bad at maths; it just means that you like to party. Self‑handicapping seems like a paradox, because people are deliberately harming their chances of success.

[Unit 14 – 11]

Early in the term, our art professor projected an image of a monk, his back to the viewer, standing on the shore, looking off into a blue sea and an enormous sky. The professor asked the class, "What do you see?" The darkened auditorium was silent. We looked and looked and thought and thought as hard as possible to unearth the hidden meaning, but came up with nothing ― we must have missed it. With dramatic exasperation she answered her own question, "It's a painting of a monk! His back is to us! He is standing near the shore! There's a blue sea and enormous sky!" Hmm... Why didn't we see it? So as not to bias us, she'd posed the question without revealing the artist or title of the work. In fact, it was Caspar David Friedrich's The Monk by the Sea. To better understand your world, consciously acknowledge what you actually see rather than guess at what you think you are supposed to see.

[Unit 14 – 12]

Even companies that sell physical products to make profit are forced by their boards and investors to reconsider their underlying motives and to collect as much data as possible from consumers. Supermarkets no longer make all their money selling their produce and manufactured goods. They give you loyalty cards with which they track your purchasing behaviors precisely. Then supermarkets sell this purchasing behavior to marketing analytics companies. The marketing analytics companies perform machine learning procedures, slicing the data in new ways, and resell behavioral data back to product manufacturers as marketing insights. When data and machine learning become currencies of value in a capitalist system, then every company's natural tendency is to maximize its ability to conduct surveillance on its own customers because the customers are themselves the new value-creation devices.

[Unit 14 – 13]

In the modern world, we look for certainty in uncertain places. We search for order in chaos, the right answer in ambiguity, and conviction in complexity. We spend far more time and effort on trying to control the world, best-selling writer Yuval Noah Harari says, "than on trying to understand it." We look for the easy-to-follow formula. Over time, we lose our ability to interact with the unknown. Our approach reminds me of the classic story of the drunk man searching for his keys under a street lamp at night. He knows he lost his keys somewhere on the dark side of the street but looks for them underneath the lamp, because that's where the light is. Our yearning for certainty leads us to pursue seemingly safe solutions ─ by looking for our keys under street lamps. Instead of taking the risky walk into the dark, we stay within our current state, however inferior it may be.

[Unit 14 – 14]

A recent study shows that dogs appear to form mental images of people's faces. Scientists placed 28 dogs in front of a computer monitor blocked by an opaque screen, then played a recording of the dog's human guardian or a stranger saying the dog's name five times through speakers in the monitor. Finally, the screen was removed to reveal either the face of the dog's human companion or a stranger's face. The dogs' reactions were videotaped. Naturally, the dogs were attentive to the sound of their name, and they typically stared about six seconds at the face after the screen was removed. But they spent significantly more time gazing at a strange face after they had heard the familiar voice of their guardian. That they paused for an extra second or two suggests that they realized something was wrong. The conclusion drawn is that dogs form a picture in their mind, and that they can think about it and make predictions based on that picture. And, like us, they are puzzled when what they see or hear doesn't match what they were expecting.

[Unit 14 – 15]

Sociologists have proven that people bring their own views and values to the culture they encounter; books, TV programs, movies, and music may affect everyone, but they affect different people in different ways. In a study, Neil Vidmar and Milton Rokeach showed episodes of the sitcom All in the Family to viewers with a range of different views on race. The show centers on a character named Archie Bunker, an intolerant bigot who often gets into fights with his more progressive family members. Vidmar and Rokeach found that viewers who didn't share Archie Bunker's views thought the show was very funny in the way it made fun of Archie's absurd racism ― in fact, this was the producers' intention. On the other hand, though, viewers who were themselves bigots thought Archie Bunker was the hero of the show and that the producers meant to make fun of his foolish family! This demonstrates why it's a mistake to assume that a certain cultural product will have the same effect on everyone.

[Unit 14 – 16]

The availability heuristic refers to a common mistake that our brains make by assuming that the instances or examples that come to mind easily are also the most important or prevalent. It shows that we make our decisions based on the recency of events. We often misjudge the frequency and magnitude of the events that have happened recently because of the limitations of our memories. According to Harvard professor, Max Bazerman, managers conducting performance appraisals often fall victim to the availability heuristic. The recency of events highly influences a supervisor's opinion during performance appraisals. Managers give more weight to performance during the three months prior to the evaluation than to the previous nine months of the evaluation period because the recent instances dominate their memories. The availability heuristic is influenced by the ease of recall or retrievability of information of some event. Ease of recall suggests that if something is more easily recalled in your memory, you think that it will occur with a high probability.

[Unit 15 - 학평 ANALYSIS]

Before getting licensed to drive a cab in London, a person has to pass an incredibly difficult test with an intimidating name ─ "The Knowledge." The test involves memorizing the layout of more than 20,000 streets in the Greater London area - a feat that involves an incredible amount of memory resources. In fact, fewer than 50 percent of the people who sign up for taxi driver training pass the test, even after spending two or three years studying for it! And as it turns out, the brains of London cabbies are different from non-cab-driving humans in ways that reflect their herculean memory efforts. In fact, the part of the brain that has been most frequently associated with spatial memory, the tail of the sea horse-shaped brain region called the hippocampus, is bigger than average in these taxi drivers.

[Unit 15 – 01]

The irony of early democracy in Europe is that it thrived and prospered precisely because European rulers for a very long time were remarkably weak. For more than a millennium after the fall of Rome, European rulers lacked the ability to assess what their people were producing and to levy substantial taxes based on this. The most striking way to illustrate European weakness is to show how little revenue they collected. Europeans would eventually develop strong systems of revenue collection, but it took them an awfully long time to do so. In medieval times, and for part of the early modern era, Chinese emperors and Muslim caliphs were able to extract much more of economic production than any European ruler with the exception of small city-states.

[Unit 15 – 02]

Human processes differ from rational processes in their outcome. A process is rational if it always does the right thing based on the current information, given an ideal performance measure. In short, rational processes go by the book and assume that the book is actually correct. Human processes involve instinct, intuition, and other variables that don't necessarily reflect the book and may not even consider the existing data. As an example, the rational way to drive a car is to always follow the laws. However, traffic isn't rational; if you follow the laws precisely, you end up stuck somewhere because other drivers aren't following the laws precisely. To be successful, a self‑driving car must therefore act humanly, rather than rationally.

[Unit 15 – 03]

Of all the human emotions, none is trickier or more elusive than envy. It is very difficult to actually discern the envy that motivates people's actions. The reason for this elusiveness is simple: we almost never directly express the envy we are feeling. Envy entails the admission to ourselves that we are inferior to another person in something we value. Not only is it painful to admit this inferiority, but it is even worse for others to see that we are feeling this. And so almost as soon as we experience the initial feelings of envy, we are motivated to disguise it to ourselves ― it is not envy we feel but unfairness at the distribution of goods or attention, resentment at this unfairness, even anger.

[Unit 15 – 04]

Taking a stand is important because you become a beacon for those individuals who are your people, your tribe, and your audience. When you raise your viewpoint up like a flag, people know where to find you; it becomes a rallying point. Displaying your perspective lets prospective (and current) customers know that you don't just sell your products or services. The best marketing is never just about selling a product or service, but about taking a stand ― showing an audience why they should believe in what you're marketing enough to want it at any cost, simply because they agree with what you're doing. Products can be changed or adjusted if they aren't functioning, but rallying points align with the values and meaning behind what you do.

[Unit 15 – 05]

Inflationary risk refers to uncertainty regarding the future real value of one's investments. Say, for instance, that you hold $100 in a bank account that has no fees and accrues no interest. If left untouched there will always be $100 in that bank account. If you keep that money in the bank for a year, during which inflation is 100 percent, you've still got $100. Only now, if you take it out and put it in your wallet, you'll only be able to purchase half the goods you could have bought a year ago. In other words, if inflation increases faster than the amount of interest you are earning, this will decrease the purchasing power of your investments over time. That's why we differentiate between nominal value and real value.

[Unit 15 – 06]

Today's "digital natives" have grown up immersed in digital technologies and possess the technical aptitude to utilize the powers of their devices fully. But although they know which apps to use or which websites to visit, they do not necessarily understand the workings behind the touch screen. People need technological literacy if they are to understand machines' mechanics and uses. In much the same way as factory workers a hundred years ago needed to understand the basic structures of engines, we need to understand the elemental principles behind our devices. This empowers us to deploy software and hardware to their fullest utility, maximizing our powers to achieve and create.

[Unit 15 – 07]

There is a pervasive idea in Western culture that humans are essentially rational, skillfully sorting fact from fiction, and, ultimately, arriving at timeless truths about the world. This line of thinking holds that humans follow the rules of logic, calculate probabilities accurately, and make decisions about the world that are perfectly informed by all available information. Conversely, failures to make effective and well-informed decisions are often attributed to failures of human reasoning ─ resulting, say, from psychological disorders or cognitive biases. In this picture, whether we succeed or fail turns out to be a matter of whether individual humans are rational and intelligent. And so, if we want to achieve better outcomes ─ truer beliefs, better decisions ─ we need to focus on improving individual human reasoning.

[Unit 15 – 08]

An interesting phenomenon that arose from social media is the concept of social proof. It's easier for a person to accept new values or ideas when they see that others have already done so. If the person they see accepting the new idea happens to be a friend, then social proof has even more power by exerting peer pressure as well as relying on the trust that people put in the judgments of their close friends. For example, a video about some issue may be controversial on its own but more credible if it got thousands of likes. If a friend recommends the video to you, in many cases, the credibility of the idea it presents will rise in direct proportion to the trust you place in the friend recommending the video. This is the power of social media and part of the reason why videos or "posts" can become "viral."

[Unit 15 – 09]

Academics, politicians, marketers and others have in the past debated whether or not it is ethically correct to market products and services directly to young consumers. This is also a dilemma for psychologists who have questioned whether they ought to help advertisers manipulate children into purchasing more products they have seen advertised. Advertisers have admitted to taking advantage of the fact that it is easy to make children feel that they are losers if they do not own the 'right' products. Clever advertising informs children that they will be viewed by their peers in an unfavorable way if they do not have the products that are advertised, thereby playing on their emotional vulnerabilities. The constant feelings of inadequateness created by advertising have been suggested to contribute to children becoming fixated with instant gratification and beliefs that material possessions are important.

[Unit 15 – 10]

As far back as the seventeenth century, hair had a special spiritual significance in Africa. Many African cultures saw the head as the center of control, communication, and identity in the body. Hair was regarded as a source of power that personified the individual and could be used for spiritual purposes or even to cast a spell. Since it rests on the highest point on the body, hair itself was a means to communicate with divine spirits and it was treated in ways that were thought to bring good luck or protect against evil. According to authors Ayana Byrd and Lori Tharps, "communication from the gods and spirits was thought to pass through the hair to get to the soul." In Cameroon, for example, medicine men attached hair to containers that held their healing potions in order to protect the potions and enhance their effectiveness.

[Unit 15 – 11]

The major oceans are all interconnected, so that their geographical boundaries are less clear than those of the continents. As a result, their biotas show fewer clear differences than those on land. The oceans themselves are continually moving because the water within each ocean basin slowly rotates. These moving waters carry marine organisms from place to place, and also help the dispersal of their young or larvae. Furthermore, the gradients between the environments of different areas of ocean water mass are very gradual and often extend over wide areas that are inhabited by a great variety of organisms of differing ecological tolerances. There are no firm boundaries within the open oceans although there may be barriers to the movement of organisms.

[Unit 15 – 12]

Marketing management is concerned not only with finding and increasing demand but also with changing or even reducing it. For example, Uluru (Ayers Rock) might have too many tourists wanting to climb it, and Daintree National Park in North Queensland can become overcrowded in the tourist season. Power companies sometimes have trouble meeting demand during peak usage periods. In these and other cases of excess demand, the needed marketing task, called demarketing, is to reduce demand temporarily or permanently. The aim of demarketing is not to completely destroy demand, but only to reduce or shift it to another time, or even another product. Thus, marketing management seeks to affect the level, timing, and nature of demand in a way that helps the organisation achieve its objectives.

[Unit 16 - 학평 ANALYSIS]

Species that are found in only one area are called endemic species and are especially vulnerable to extinction. They exist on islands and in other unique small areas, especially in tropical rain forests where most species are highly specialized. One example is the brilliantly colored golden toad once found only in a small area of lush rain forests in Costa Rica's mountainous region. Despite living in the country's well-protected Monteverde Cloud Forest Reserve, by 1989, the golden toad had apparently become extinct. Much of the moisture that supported its rain forest habitat came in the form of moisture-laden clouds blowing in from the Caribbean Sea. But warmer air from global climate change caused these clouds to rise, depriving the forests of moisture, and the habitat for the golden toad and many other species dried up. The golden toad appears to be one of the first victims of climate change caused largely by global warming.

[Unit 16 – 01]

If you drive down a busy street, you will find many competing businesses, often right next to one another. For example, in most places a consumer in search of a quick meal has many choices, and more fast-food restaurants appear all the time. These competing firms advertise heavily. The temptation is to see advertising as driving up the price of a product without any benefit to the consumer. However, this misconception doesn't account for why firms advertise. In markets where competitors sell slightly differentiated products, advertising enables firms to inform their customers about new products and services. Yes, costs rise, but consumers also gain information to help make purchasing decisions. Consumers also benefit from added variety, and we all get a product that's pretty close to our vision of a perfect good ─ and no other market structure delivers that outcome.

[Unit 16 – 02]

When evaluating a policy, people tend to concentrate on how the policy will fix some particular problem while ignoring or downplaying other effects it may have. Economists often refer to this situation as The Law of Unintended Consequences. For instance, suppose that you impose a tariff on imported steel in order to protect the jobs of domestic steelworkers. If you impose a high enough tariff, their jobs will indeed be protected from competition by foreign steel companies. But an unintended consequence is that the jobs of some autoworkers will be lost to foreign competition. Why? The tariff that protects steelworkers raises the price of the steel that domestic automobile makers need to build their cars. As a result, domestic automobile manufacturers have to raise the prices of their cars, making them relatively less attractive than foreign cars. Raising prices tends to reduce domestic car sales, so some domestic autoworkers lose their jobs.

[Unit 16 – 03]

A common but incorrect assumption is that we are creatures of reason when, in fact, we are creatures of both reason and emotion. We cannot get by on reason alone since any reason always eventually leads to a feeling. Should I get a wholegrain cereal or a chocolate cereal? I can list all the reasons I want, but the reasons have to be based on something. For example, if my goal is to eat healthy, I can choose the wholegrain cereal, but what is my reason for wanting to be healthy? I can list more and more reasons such as wanting to live longer, spending more quality time with loved ones, etc., but what are the reasons for those reasons? You should be able to see by now that reasons are ultimately based on non‑reason such as values, feelings, or emotions. These deep‑seated values, feelings, and emotions we have are rarely a result of reasoning, but can certainly be influenced by reasoning. We have values, feelings, and emotions before we begin to reason and long before we begin to reason effectively.

[Unit 16 – 04]

The right to be forgotten is a right distinct from but related to a right to privacy. The right to privacy is, among other things, the right for information traditionally regarded as protected or personal not to be revealed. The right to be forgotten, in contrast, can be applied to information that has been in the public domain. The right to be forgotten broadly includes the right of an individual not to be forever defined by information from a specific point in time. One motivation for such a right is to allow individuals to move on with their lives and not be defined by a specific event or period in their lives. For example, it has long been recognized in some countries, such as the UK and France, that even past criminal convictions should eventually be "spent" and not continue to affect a person's life. Despite the reason for supporting the right to be forgotten, the right to be forgotten can sometimes come into conflict with other rights. For example, formal exceptions are sometimes made for security or public health reasons.

[Unit 16 – 05]

If DNA were the only thing that mattered, there would be no particular reason to build meaningful social programs to pour good experiences into children and protect them from bad experiences. But brains require the right kind of environment if they are to correctly develop. When the first draft of the Human Genome Project came to completion at the turn of the millennium, one of the great surprises was that humans have only about twenty thousand genes. This number came as a surprise to biologists: given the complexity of the brain and the body, it had been assumed that hundreds of thousands of genes would be required. So how does the massively complicated brain, with its eighty‐six billion neurons, get built from such a small recipe book? The answer relies on a clever strategy implemented by the genome: build incompletely and let world experience refine.

[Unit 16 – 06]

One interesting feature of network markets is that "history matters." A famous example is the QWERTY keyboard used with your computer. You might wonder why this particular configuration of keys, with its awkward placement of the letters, became the standard. The QWERTY keyboard in the 19th century was developed in the era of manual typewriters with physical keys. The keyboard was designed to keep frequently used keys (like E and O) physically separated in order to prevent them from jamming. By the time the technology for electronic typing evolved, millions of people had already learned to type on millions of QWERTY typewriters. Replacing the QWERTY keyboard with a more efficient design would have been both expensive and difficult to coordinate. Thus, the placement of the letters stays with the obsolete QWERTY on today's English-language keyboards.

[Unit 16 – 07]

The ancient Greeks used to describe two very different ways of thinking ― logos and mythos. Logos roughly referred to the world of the logical, the empirical, the scientific. Mythos referred to the world of dreams, storytelling and symbols. Like many rationalists today, some philosophers of Greece prized logos and looked down at mythos. Logic and reason, they concluded, make us modern; storytelling and mythmaking are primitive. But lots of scholars then and now ― including many anthropologists, sociologists and philosophers today ― see a more complicated picture, where mythos and logos are intertwined and interdependent. Science itself, according to this view, relies on stories. The frames and metaphors we use to understand the world shape the scientific discoveries we make; they even shape what we see. When our frames and metaphors change, the world itself is transformed. The Copernican Revolution involved more than just scientific calculation; it involved a new story about the place of Earth in the universe.

[Unit 16 – 08]

There is no doubt that the length of some literary works is overwhelming. Reading or translating a work in class, hour after hour, week after week, can be such a boring experience that many students never want to open a foreign language book again. Extracts provide one type of solution. The advantages are obvious: reading a series of passages from different works produces more variety in the classroom, so that the teacher has a greater chance of avoiding monotony, while still giving learners a taste at least of an author's special flavour. On the other hand, a student who is only exposed to 'bite-sized chunks' will never have the satisfaction of knowing the overall pattern of a book, which is after all the satisfaction most of us seek when we read something in our own language. Moreover, there are some literary features that cannot be adequately illustrated by a short excerpt: the development of plot or character, for instance, with the gradual involvement of the reader that this implies; or the unfolding of a complex theme through the juxtaposition of contrasting views.

[Unit 16 – 09]

When trying to sustain an independent ethos, cultures face a problem of critical mass. No single individual, acting on his or her own, can produce an ethos. Rather, an ethos results from the interdependent acts of many individuals. This cluster of produced meaning may require some degree of insulation from larger and wealthier outside forces. The Canadian Inuit maintain their own ethos, even though they number no more than twenty-four thousand. They manage this feat through a combination of trade, to support their way of life, and geographic isolation. The Inuit occupy remote territory, removed from major population centers of Canada. If cross-cultural contact were to become sufficiently close, the Inuit ethos would disappear. Distinct cultural groups of similar size do not, in the long run, persist in downtown Toronto, Canada, where they come in contact with many outside influences and pursue essentially Western paths for their lives.

[Unit 16 – 10]

In one survey, 61 percent of Americans said that they supported the government spending more on 'assistance to the poor'. But when the same population was asked whether they supported spending more government money on 'welfare', only 21 percent were in favour. In other words, if you ask people about individual welfare programmes ― such as giving financial help to people who have long‑term illnesses and paying for school meals for families with low income ― people are broadly in favour of them. But if you ask about 'welfare' ― which refers to those exact same programmes that you've just listed ― they're against it. The word 'welfare' has negative connotations, perhaps because of the way many politicians and newspapers portray it. Therefore, the framing of a question can heavily influence the answer in many ways, which matters if your aim is to obtain a 'true measure' of what people think. And next time you hear a politician say 'surveys prove that the majority of the people agree with me', be very wary.

[Unit 16 – 11]

We commonly argue about the fairness of taxation ― whether this or that tax will fall more heavily on the rich or the poor. But the expressive dimension of taxation goes beyond debates about fairness, to the moral judgements societies make about which activities are worthy of honor and recognition, and which ones should be discouraged. Sometimes, these judgements are explicit. Taxes on tobacco, alcohol, and casinos are called "sin taxes" because they seek to discourage activities considered harmful or undesirable. Such taxes express society's disapproval of these activities by raising the cost of engaging in them. Proposals to tax sugary sodas (to combat obesity) or carbon emissions (to address climate change) likewise seek to change norms and shape behavior. Not all taxes have this aim. We do not tax income to express disapproval of paid employment or to discourage people from engaging in it. Nor is a general sales tax intended as a deterrent to buying things. These are simply ways of raising revenue.

[Unit 16 – 12]

When we think of culture, we first think of human cultures, of our culture. We think of computers, airplanes, fashions, teams, and pop stars. For most of human cultural history, none of those things existed. For hundreds of thousands of years, no human culture had a tool with moving parts. Well into the twentieth century, various human foraging cultures retained tools of stone, wood, and bone. We might pity human hunter-gatherers for their stuck simplicity, but we would be making a mistake. They held extensive knowledge, knew deep secrets of their lands and creatures. And they experienced rich and rewarding lives; we know so because when their ways were threatened, they fought to hold on to them, to the death. Sadly, this remains true as the final tribal peoples get overwhelmed by those who value money above humanity. We are living in their end times and, to varying extents, we're all contributing to those endings. Ultimately our values may even prove self-defeating.

[Unit 16 – 13]

When an important change takes place in your life, observe your response. If you resist accepting the change it is because you are afraid; afraid of losing something. Perhaps you might lose your position, property, possession, or money. The change might mean that you lose privileges or prestige. Perhaps with the change you lose the closeness of a person or a place. In life, all these things come and go and then others appear, which will also go. It is like a river in constant movement. If we try to stop the flow, we create a dam; the water stagnates and causes a pressure which accumulates inside us. To learn to let go, to not cling and allow the flow of the river, is to live without resistances; being the creators of constructive changes that bring about improvements and widen our horizons.

[Unit 16 – 14]

The invention of the mechanical clock was influenced by monks who lived in monasteries that were the examples of order and routine. They had to keep accurate time so that monastery bells could be rung at regular intervals to announce the seven hours of the day reserved for prayer. Early clocks were nothing more than a weight tied to a rope wrapped around a revolving drum. Time was determined by watching the length of the weighted rope. The discovery of the pendulum in the seventeenth century led to the widespread use of clocks and enormous public clocks. Eventually, keeping time turned into serving time. People started to follow the mechanical time of clocks rather than their natural body time. They ate at meal time, rather than when they were hungry, and went to bed when it was time, rather than when they were sleepy. Even periodicals and fashions became "yearly." The world had become orderly.

[Unit 16 – 15]

Since we know we can't completely eliminate our biases, we need to try to limit the harmful impacts they can have on the objectivity and rationality of our decisions and judgments. It is important that we are aware when one of our cognitive biases is activated and make a conscious choice to overcome that bias. We need to be aware of the impact the bias has on our decision making process and our life. Then we can choose an appropriate de‒biasing strategy to combat it. After we have implemented a strategy, we should check in again to see if it worked in the way we had hoped. If it did, we can move on and make an objective and informed decision. If it didn't, we can try the same strategy again or implement a new one until we are ready to make a rational judgment.

[Unit 16 – 16]

Habits create the foundation for mastery. In chess, it is only after the basic movements of the pieces have become automatic that a player can focus on the next level of the game. Each chunk of information that is memorized opens up the mental space for more effortful thinking. This is true for anything you attempt. When you know the simple movements so well that you can perform them without thinking, you are free to pay attention to more advanced details. In this way, habits are the backbone of any pursuit of excellence. However, the benefits of habits come at a cost. At first, each repetition develops fluency, speed, and skill. But then, as a habit becomes automatic, you become less sensitive to feedback. You fall into mindless repetition. It becomes easier to let mistakes slide. When you can do it "good enough" automatically, you stop thinking about how to do it better.

[Unit 17 - 학평 ANALYSIS]

Much research has been carried out on the causes of engagement, an issue that is important from both a theoretical and practical standpoint: identifying the drivers of work engagement may enable us to manipulate or influence it. The causes of engagement fall into two major camps: situational and personal. The most influential situational causes are job resources, feedback and leadership, the latter, of course, being responsible for job resources and feedback. Indeed, leaders influence engagement by giving their employees honest and constructive feedback on their performance, and by providing them with the necessary resources that enable them to perform their job well. It is, however, noteworthy that although engagement drives job performance, job performance also drives engagement. In other words, when employees are able to do their jobs well ─ to the point that they match or exceed their own expectations and ambitions ─ they will engage more, be proud of their achievements, and find work more meaningful. This is especially evident when people are employed in jobs that align with their values.

[Unit 17 – 01]

The fundamental nature of the experimental method is manipulation and control. Scientists manipulate a variable of interest, and see if there's a difference. At the same time, they attempt to control for the potential effects of all other variables. The importance of controlled experiments in identifying the underlying causes of events cannot be overstated. In the real-uncontrolled-world, variables are often correlated. For example, people who take vitamin supplements may have different eating and exercise habits than people who don't take vitamins. As a result, if we want to study the health effects of vitamins, we can't merely observe the real world, since any of these factors (the vitamins, diet, or exercise) may affect health. Rather, we have to create a situation that doesn't actually occur in the real world. That's just what scientific experiments do. They try to separate the naturally occurring relationship in the world by manipulating one specific variable at a time, while holding everything else constant.

[Unit 17 – 02]

Why do people in the Mediterranean live longer and have a lower incidence of disease? Some people say it's because of what they eat. Their diet is full of fresh fruits, fish, vegetables, whole grains, and nuts. Individuals in these cultures drink red wine and use great amounts of olive oil. Why is that food pattern healthy? One reason is that they are eating a palette of colors. More and more research is surfacing that shows us the benefits of the thousands of colorful "phytochemicals"(phyto=plant) that exist in foods. These healthful, non‑nutritive compounds in plants provide color and function to the plant and add to the health of the human body. Each color connects to a particular compound that serves a specific function in the body. For example, if you don't eat purple foods, you are probably missing out on anthocyanins, important brain protection compounds. Similarly, if you avoid green‑colored foods, you may be lacking chlorophyll, a plant antioxidant that guards your cells from damage.

[Unit 17 – 03]

Electric communication is mainly known in fish. The electric signals are produced in special electric organs. When the signal is discharged the electric organ will be negatively loaded compared to the head and an electric field is created around the fish. A weak electric current is created also in ordinary muscle cells when they contract. In the electric organ the muscle cells are connected in larger chunks, which makes the total current intensity larger than in ordinary muscles. The fish varies the signals by changing the form of the electric field or the frequency of discharging. The system is only working over small distances, about one to two meters. This is an advantage since the species using the signal system often live in large groups with several other species. If many fish send out signals at the same time, the short range decreases the risk of interference.

[Unit 17 – 04]

In the natural world, if an animal consumes a plant with enough antinutrients to make it feel unwell, it won't eat that plant again. Intuitively, animals also know to stay away from these plants. Years of evolution and information being passed down created this innate intelligence. This "intuition," though, is not just seen in animals. Have you ever wondered why most children hate vegetables? Dr. Steven Gundry justifies this as part of our genetic programming, our inner intelligence. Since many vegetables are full of antinutrients, your body tries to keep you away from them while you are still fragile and in development. It does this by making your taste buds perceive these flavors as bad and even disgusting. As you grow and your body becomes stronger enough to tolerate these antinutrients, suddenly they no longer taste as bad as before.

[Unit 17 – 05]

Adaptation involves changes in a population, with characteristics that are passed from one generation to the next. This is different from acclimation ― an individual organism's changes in response to an altered environment. For example, if you spend the summer outside, you may acclimate to the sunlight: your skin will increase its concentration of dark pigments that protect you from the sun. This is a temporary change, and you won't pass the temporary change on to future generations. However, the capacity to produce skin pigments is inherited. For populations living in intensely sunny environments, individuals with a good ability to produce skin pigments are more likely to thrive, or to survive, than people with a poor ability to produce pigments, and that trait becomes increasingly common in subsequent generations. If you look around, you can find countless examples of adaptation. The distinctive long neck of a giraffe, for example, developed as individuals that happened to have longer necks had an advantage in feeding on the leaves of tall trees.

[Unit 17 – 06]

One way of measuring temperature occurs if an object is hot enough to visibly glow, such as a metal poker that has been left in a fire. The color of a glowing object is related to its temperature: as the temperature rises, the object is first red and then orange, and finally it gets white, the "hottest" color. The relation between temperature and the color of a glowing object is useful to astronomers. The color of stars is related to their temperature, and since people cannot as yet travel the great distances to the stars and measure their temperature in a more precise way, astronomers rely on their color. This temperature is of the surface of the star, the part of the star which is emitting the light that can be seen. The interior of the star is at a much higher temperature, though it is concealed. But the information obtained from the color of the star is still useful.

[Unit 17 – 07]

In the early stages of modern science, scientists communicated their creative ideas largely by publishing books. This modus operandi is illustrated not only by Newton's Principia, but also by Copernicus' On the Revolutions of the Heavenly Spheres, Kepler's The Harmonies of the World, and Galileo's Dialogues Concerning the Two New Sciences. With the advent of scientific periodicals, such as the Transactions of the Royal Society of London, books gradually yielded ground to the technical journal article as the chief form of scientific communication. Of course, books were not abandoned altogether, as Darwin's Origin of Species shows. Even so, it eventually became possible for scientists to establish a reputation for their creative contributions without publishing a single book-length treatment of their ideas. For instance, the revolutionary ideas that earned Einstein his Nobel Prize ― concerning the special theory of relativity and the photoelectric effect ― appeared as papers in the Annalen der Physik. His status as one of the greatest scientists of all time does not depend on the publication of a single book.

[Unit 17 – 08]

A supply schedule refers to the ability of a business to change their production rates to meet the demand of consumers. Some businesses are able to increase their production level quickly in order to meet increased demand. However, sporting clubs have a fixed, or inflexible (inelastic) production capacity. They have what is known as a fixed supply schedule. It is worth noting that this is not the case for sales of clothing, equipment, memberships and memorabilia. But clubs and teams can only play a certain number of times during their season. If fans and members are unable to get into a venue, that revenue is lost forever. Although sport clubs and leagues may have a fixed supply schedule, it is possible to increase the number of consumers who watch. For example, the supply of a sport product can be increased by providing more seats, changing the venue, extending the playing season or even through new television, radio or Internet distribution.

[Unit 17 – 09]

The United Nations asks that all companies remove their satellites from orbit within 25 years after the end of their mission. This is tricky to enforce, though, because satellites can (and often do) fail. To tackle this problem, several companies around the world have come up with novel solutions. These include removing dead satellites from orbit and dragging them back into the atmosphere, where they will burn up. Ways we could do this include using a harpoon to grab a satellite, catching it in a huge net, using magnets to grab it, or even firing lasers to heat up the satellite, increasing its atmospheric drag so that it falls out of orbit. However, these methods are only useful for large satellites orbiting Earth. There isn't really a way for us to pick up smaller pieces of debris such as bits of paint and metal. We just have to wait for them to naturally re-enter Earth's atmosphere.

[Unit 17 – 10]

Risk often arises from uncertainty about how to approach a problem or situation. One way to avoid such risk is to contract with a party who is experienced and knows how to do it. For example, to minimize the financial risk associated with the capital cost of tooling and equipment for production of a large, complex system, a manufacturer might subcontract the production of the system's major components to suppliers familiar with those components. This relieves the manufacturer of the financial risk associated with the tooling and equipment to produce these components. However, transfer of one kind of risk often means inheriting another kind. For example, subcontracting work for the components puts the manufacturer in the position of relying on outsiders, which increases the risks associated with quality control, scheduling, and the performance of the end‑item system. But these risks often can be reduced through careful management of the suppliers.

[Unit 17 – 11]

Most beliefs ─ but not all ─ are open to tests of verification. This means that beliefs can be tested to see if they are correct or false. Beliefs can be verified or falsified with objective criteria external to the person. There are people who believe the Earth is flat and not a sphere. Because we have objective evidence that the Earth is in fact a sphere, the flat Earth belief can be shown to be false. Also, the belief that it will rain tomorrow can be tested for truth by waiting until tomorrow and seeing whether it rains or not. However, some types of beliefs cannot be tested for truth because we cannot get external evidence in our lifetimes (such as a belief that the Earth will stop spinning on its axis by the year 9999 or that there is life on a planet 100-million light-years away). Also, metaphysical beliefs (such as the existence and nature of a god) present considerable challenges in generating evidence that everyone is willing to use as a truth criterion.

[Unit 17 – 12]

Liquids are destructive. Foams feel soft because they are easily compressed; if you jump on to a foam mattress, you'll feel it give beneath you. Liquids don't do this; instead they flow. You see this in a river, or when you turn on a tap, or if you use a spoon to stir your coffee. When you jump off a diving board and hit a body of water, the water has to flow away from you. But the flowing takes time, and if your speed of impact is too great, the water won't be able to flow away fast enough, and so it pushes back at you. It's that force that stings your skin as you belly-flop into a pool, and makes falling into water from a great height like landing on concrete. The incompressibility of water is also why waves can have such deadly power, and in the case of tsunamis, why they can destroy buildings and cities, tossing cars around easily.

[Unit 17 – 13]

Some resources, decisions, or activities are important (highly valuable on average) while others are pivotal (small changes make a big difference). Consider how two components of a car relate to a consumer's purchase decision: tires and interior design. Which adds more value on average? The tires. They are essential to the car's ability to move, and they impact both safety and performance. Yet tires generally do not influence purchase decisions because safety standards guarantee that all tires will be very safe and reliable. Differences in interior features ― optimal sound system, portable technology docks, number and location of cup holders ― likely have far more effect on the consumer's buying decision. In terms of the overall value of an automobile, you can't drive without tires, but you can drive without cup holders and a portable technology dock. Interior features, however, clearly have a greater impact on the purchase decision. In our language, the tires are important, but the interior design is pivotal.

[Unit 17 – 14]

It is important to remember that computers can only carry out instructions that humans give them. Computers can process data accurately at far greater speeds than people can, yet they are limited in many respects ― most importantly, they lack common sense. However, combining the strengths of these machines with human strengths creates synergy. Synergy occurs when combined resources produce output that exceeds the sum of the outputs of the same resources employed separately. A computer works quickly and accurately; humans work relatively slowly and make mistakes. A computer cannot make independent decisions, however, or formulate steps for solving problems, unless programmed to do so by humans. Even with sophisticated artificial intelligence, which enables the computer to learn and then implement what it learns, the initial programming must be done by humans. Thus, a human‒computer combination allows the results of human thought to be translated into efficient processing of large amounts of data.

[Unit 17 – 15]

For hundreds of thousands of years our hunter‒gatherer ancestors could survive only by constantly communicating with one another through nonverbal cues. Developed over so much time, before the invention of language, that is how the human face became so expressive, and gestures so elaborate. We have a continual desire to communicate our feelings and yet at the same time the need to conceal them for proper social functioning. With these counterforces battling inside us, we cannot completely control what we communicate. Our real feelings continually leak out in the form of gestures, tones of voice, facial expressions, and posture. We are not trained, however, to pay attention to people's nonverbal cues. By sheer habit, we fixate on the words people say, while also thinking about what we'll say next. What this means is that we are using only a small percentage of the potential social skills we all possess.

[Unit 17 – 16]

The boundary between uniquely human creativity and machine capabilities continues to change. Returning to the game of chess, back in 1956, thirteen-year-old child prodigy Bobby Fischer made a pair of remarkably creative moves against grandmaster Donald Byrne. First he sacrificed his knight, seemingly for no gain, and then exposed his queen to capture. On the surface, these moves seemed insane, but several moves later, Fischer used these moves to win the game. His creativity was praised at the time as the mark of genius. Yet today if you program that same position into an ordinary chess program, it will immediately suggest the exact moves that Fischer made. It's not because the computer has memorized the Fischer-Byrne game, but rather because it searches far enough ahead to see that these moves really do pay off.

[Unit 18 - 학평 ANALYSIS]

People behave in highly predictable ways when they experience certain thoughts. When they agree, they nod their heads. So far, no surprise, but according to an area of research known as "proprioceptive psychology," the process also works in reverse. Get people to behave in a certain way and you cause them to have certain thoughts. The idea was initially controversial, but fortunately it was supported by a compelling experiment. Participants in a study were asked to fixate on various products moving across a large computer screen and then indicate whether the items appealed to them. Some of the items moved vertically (causing the participants to nod their heads while watching), and others moved horizontally (resulting in a side-to-side head movement). Participants preferred vertically moving products without being aware that their "yes" and "no" head movements had played a key role in their decisions.

[Unit 18 – 01]

In 2006, researchers conducted a study on the motivations for helping after the September 11th terrorist attacks against the United States. In the study, they found that individuals who gave money, blood, goods, or other forms of assistance because of other-focused motives (giving to reduce another's discomfort) were almost four times more likely to still be giving support one year later than those whose original motivation was to reduce personal distress. This effect likely stems from differences in emotional arousal. The events of September 11th emotionally affected people throughout the United States. Those who gave to reduce their own distress reduced their emotional arousal with their initial gift, discharging that emotional distress. However, those who gave to reduce others' distress did not stop empathizing with victims who continued to struggle long after the attacks.

[Unit 18 – 02]

A young child may be puzzled when asked to distinguish between the directions of right and left. But that same child may have no difficulty in determining the directions of up and down or back and front. Scientists propose that this occurs because, although we experience three dimensions, only two had a strong influence on our evolution: the vertical dimension as defined by gravity and, in mobile species, the front/back dimension as defined by the positioning of sensory and feeding mechanisms. These influence our perception of vertical versus horizontal, far versus close, and the search for dangers from above (such as an eagle) or below (such as a snake). However, the left‑right axis is not as relevant in nature. A bear is equally dangerous from its left or the right side, but not if it is upside down. In fact, when observing a scene containing plants, animals, and man‑made objects such as cars or street signs, we can only tell when left and right have been inverted if we observe those artificial items.

[Unit 18 – 03]

A study investigated the economic cost of prejudice based on blind assumptions. Researchers gave a group of Danish teenagers the choice of working with one of two people. The teenager had never met either of them. One of the people had a name that suggested they were from a similar ethnic or religious background to the teenager. The other had a name that suggested they were from a different ethnic or religious background. The study showed that the teenagers were prepared to earn an average of 8% less if they could work with someone they thought came from the same ethnic or religious background. And this prejudice was evident among teenagers with ethnic majority names as well as those with ethnic minority names. The teenagers were blindly making assumptions about the race of their potential colleagues. They then applied prejudice to those assumptions, to the point where they actually allowed that prejudice to reduce their own potential income. The job required the two teenagers to work together for just 90 minutes.

[Unit 18 – 04]

Greenwashing involves misleading a consumer into thinking a good or service is more environmentally friendly than it really is. Greenwashing ranges from making environmental claims required by law, and therefore irrelevant (CFC-free for example), to puffery (exaggerating environmental claims) to fraud. Researchers have shown that claims on products are often too vague or misleading. Some products are labeled "chemical-free," when the fact is everything contains chemicals, including plants and animals. Products with the highest number of misleading or unverifiable claims were laundry detergents, household cleaners, and paints. Environmental advocates agree there is still a long way to go to ensure shoppers are adequately informed about the environmental impact of the products they buy. The most common reason for greenwashing is to attract environmentally conscious consumers. Many consumers do not find out about the false claims until after the purchase. Therefore, greenwashing may increase sales in the short term. However, this strategy can seriously backfire when consumers find out they are being deceived.

[Unit 18 – 05]

The great irony of performance psychology is that it teaches each sportsman to believe, as far as he is able, that he will win. No man doubts. No man indulges his inner skepticism. That is the logic of sports psychology. But only one man can win. That is the logic of sport. Note the difference between a scientist and an athlete. Doubt is a scientist's stock in trade. Progress is made by focusing on the evidence that refutes a theory and by improving the theory accordingly. Skepticism is the rocket fuel of scientific advance. But doubt, to an athlete, is poison. Progress is made by ignoring the evidence; it is about creating a mindset that is immune to doubt and uncertainty. Just to reiterate: From a rational perspective, this is nothing less than crazy. Why should an athlete convince himself he will win when he knows that there is every possibility he will lose? Because, to win, one must proportion one's belief, not to the evidence, but to whatever the mind can usefully get away with.

[Unit 18 – 06]

Distance is a reliable indicator of the relationship between two people. Strangers stand further apart than do acquaintances, acquaintances stand further apart than friends, and friends stand further apart than romantic partners. Sometimes, of course, these rules are violated. Recall the last time you rode 20 stories in an elevator packed with total strangers. The sardine-like experience no doubt made the situation a bit uncomfortable. With your physical space violated, you may have tried to create "psychological" space by avoiding eye contact, focusing instead on the elevator buttons. By reducing closeness in one nonverbal channel (eye contact), one can compensate for unwanted closeness in another channel (proximity). Similarly, if you are talking with someone who is seated several feet away at a large table, you are likely to maintain constant eye contact ― something you might feel uncomfortable doing if you were standing next to each other.

[Unit 18 – 07]

In a study, Guy Mayraz, a behavioral economist, showed his experimental subjects graphs of a price rising and falling over time. The graphs were actually of past changes in the stock market, but Mayraz told people that the graphs showed recent changes in the price of wheat. He asked each person to predict where the price would move next ― and offered them a reward if their forecasts came true. But Mayraz had also divided his participants into two categories, "farmers" and "bakers". Farmers would be paid extra if wheat prices were high. Bakers would earn a bonus if wheat was cheap. So the subjects might earn two separate payments: one for an accurate forecast, and a bonus if the price of wheat moved in their direction. Mayraz found that the prospect of the bonus influenced the forecast itself. The farmers hoped and predicted that the price of wheat would rise. The bakers hoped for ― and predicted ― the opposite. They let their hopes influence their reasoning.

[Unit 18 – 08]

Music is used to mold customer experience and behavior. A study was conducted that explored what impact it has on employees. Results from the study indicate that participants who listen to rhythmic music were inclined to cooperate more irrespective of factors like age, gender, and academic background, compared to those who listened to less rhythmic music. This positive boost in the participants' willingness to cooperate was induced regardless of whether they liked the music or not. When people are in a more positive state of mind, they tend to become more agreeable and creative, while those on the opposite spectrum tend to focus on their individual problems rather than giving attention to solving group problems. The rhythm of music has a strong pull on people's behavior. This is because when people listen to music with a steady pulse, they tend to match their actions to the beat. This translates to better teamwork when making decisions because everyone is following one tempo.

[Unit 18 – 09]

At the University of Iowa, students were briefly shown numbers that they had to memorize. Then they were offered the choice of either a fruit salad or a chocolate cake. When the number the students memorized was seven digits long, 63% of them chose the cake. When the number they were asked to remember had just two digits, however, 59% opted for the fruit salad. Our reflective brains know that the fruit salad is better for our health, but our reflexive brains desire that soft, fattening chocolate cake. If the reflective brain is busy figuring something else out ─ like trying to remember a seven-digit number ─ then impulse can easily win. On the other hand, if we're not thinking too hard about something else (with only a minor distraction like memorizing two digits), then the reflective system can deny the emotional impulse of the reflexive side.

[Unit 18 – 10]

In 2011, Micah Edelson and his colleagues conducted an interesting experiment about external factors of memory manipulation. In their experiment, participants were shown a two minute documentary film and then asked a series of questions about the video. Directly after viewing the videos, participants made few errors in their responses and were correctly able to recall the details. Four days later, they could still remember the details and didn't allow their memories to be swayed when they were presented with any false information about the film. This changed, however, when participants were shown fake responses about the film made by other participants. Upon seeing the incorrect answers of others, participants were also drawn toward the wrong answers themselves. Even after they found out that the other answers had been fabricated and didn't have anything to do with the documentary, it was too late. The participants were no longer able to distinguish between truth and fiction. They had already modified their memories to fit the group.

[Unit 18 – 11]

Some researchers at Sheffield University recruited 129 hobbyists to look at how the time spent on their hobbies shaped their work life. To begin with, the team measured the seriousness of each participant's hobby, asking them to rate their agreement with statements like "I regularly train for this activity," and also assessed how similar the demands of their job and hobby were. Then, each month for seven months, participants recorded how many hours they had dedicated to their activity, and completed a scale measuring their belief in their ability to effectively do their job, or their "self-efficacy." The researchers found that when participants spent longer than normal doing their leisure activity, their belief in their ability to perform their job increased. But this was only the case when they had a serious hobby that was dissimilar to their job. When their hobby was both serious and similar to their job, then spending more time on it actually decreased their self-efficacy.

[Unit 18 – 12]

Why do we help? One widely held view is that self‒interest underlies all human interactions, that our constant goal is to maximize rewards and minimize costs. Accountants call it cost‒benefit analysis. Philosophers call it utilitarianism. Social psychologists call it social exchange theory. If you are considering whether to donate blood, you may weigh the costs of doing so (time, discomfort, and anxiety) against the benefits (reduced guilt, social approval, and good feelings). If the rewards exceed the costs, you will help. Others believe that we help because we have been socialized to do so, through norms that prescribe how we ought to behave. Through socialization, we learn the reciprocity norm: the expectation that we should return help, not harm, to those who have helped us. In our relations with others of similar status, the reciprocity norm compels us to give (in favors, gifts, or social invitations) about as much as we receive.

[Unit 19 - 학평 ANALYSIS]

Creative people aren't all cut from the same cloth. They have varying levels of maturity and sensitivity. They have different approaches to work. And they're each motivated by different things. Managing people is about being aware of their unique personalities. It's also about empathy and adaptability, and knowing how the things you do and say will be interpreted and adapting accordingly. Who you are and what you say may not be the same from one person to the next. For instance, if you're asking someone to work a second weekend in a row, or telling them they aren't getting that deserved promotion just yet, you need to bear in mind the individual. Vincent will have a very different reaction to the news than Emily, and they will each be more receptive to the news if it's bundled with different things. Perhaps that promotion news will land easier if Vincent is given a few extra vacation days for the holidays, while you can promise Emily a bigger promotion a year from now. Consider each person's complex positive and negative personality traits, their life circumstances, and their mindset in the moment when deciding what to say and how to say it. Personal connection, compassion, and an individualized management style are key to drawing consistent, rock star‑level work out of everyone.

[Unit 19 – 01~02]

In England in the 1680s, it was unusual to live to the age of fifty. This was a period when knowledge was not spread widely, there were few books and most people could not read. As a consequence, knowledge passed down through the oral traditions of stories and shared experiences. And since older people had accumulated more knowledge, the social norm was that to be over fifty was to be wise. This social perception of age began to shift with the advent of new technologies such as the printing press. Over time, as more books were printed, literacy increased, and the oral traditions of knowledge transfer began to fade. With the fading of oral traditions, the wisdom of the old became less important and as a consequence being over fifty was no longer seen as signifying wisdom. We are living in a period when the gap between chronological and biological age is changing fast and where social norms are struggling to adapt. In a video produced by the AARP (formerly the American Association of Retired Persons), young people were asked to do various activities 'just like an old person'. When older people joined them in the video, the gap between the stereotype and the older people's actual behaviour was striking. It is clear that in today's world our social norms need to be updated quickly.

[Unit 19 – 03~04]

Events or experiences that are out of ordinary tend to be remembered better because there is nothing competing with them when your brain tries to access them from its storehouse of remembered events. In other words, the reason it can be difficult to remember what you ate for breakfast two Thursdays ago is that there was probably nothing special about that Thursday or that particular breakfast ― consequently, all your breakfast memories combine together into a sort of generic impression of a breakfast. Your memory merges similar events not only because it's more efficient to do so, but also because this is fundamental to how we learn things ― our brains extract abstract rules that tie experiences together. This is especially true for things that are routine. If your breakfast is always the same ― cereal with milk, a glass of orange juice, and a cup of coffee for instance ― there is no easy way for your brain to extract the details from one particular breakfast. Ironically, then, for behaviors that are routinized, you can remember the generic content of the behavior (such as the things you ate, since you always eat the same thing), but particulars to that one instance can be very difficult to call up (such as the sound of a garbage truck going by or a bird that passed by your window) unless they were especially distinctive. On the other hand, if you did something unique that broke your routine ― perhaps you had leftover pizza for breakfast and spilled tomato sauce on your dress shirt ― you are more likely to remember it.

[Unit 19 – 05~06]

A neuropsychologist, Michael Gazzaniga conducted a study that shows that our brains excel atcreating coherent (but not necessarily true) stories that deceive us. In the study, split-brain patients were shown an image such that it was visible to only their left eye and asked to select a related card with their left hand. Left-eye vision and left-side body movement are controlled by the right hemisphere. In a split-brain patient, the connection between the right and left hemispheres has been broken, meaning no information can cross from one hemisphere to the other. Therefore, in this experiment, the right hemisphere was doing all of the work, and the left hemisphere was unaware of what was happening. Gazzaniga then asked participants why they chose the card that they did. Because language is processed and generated in the left hemisphere, the left hemisphere is required to respond. However, because of the experiment's design, only the right hemisphere knew why the participant selected the card. As a result, Gazzaniga expected the participants to be silent when asked to answer the question. But instead, every subject fabricated a response. The left hemisphere was being asked to provide a rationalization for a behavior done by the right hemisphere. The left hemisphere didn't know the answer. But that didn't keep it from fabricating an answer. That answer, however, had no basis in reality. Now if this study had been limited to split-brain patients, it would be interesting but not very relevant to us. It turns out split-brain patients aren't the only ones who fabricate reasons. We all do it. We all need a coherent story about ourselves, and when information in that story is missing, our brains simply fill in the details.

[Unit 19 – 07~08]

The driver of FOMO (the fear of missing out) is the social pressure to be at the right place with the right people, whether it's from a sense of duty or just trying to get ahead, we feel obligated to attend certain events for work, for family and for friends. This pressure from society combined with FOMO can wear us down. According to a recent survey, 70 percent of employees admit that when they take a vacation, they still don't disconnect from work. Our digital habits, which include constantly checking emails, and social media timelines, have become so firmly established, it is nearly impossible to simply enjoy the moment, along with the people with whom we are sharing these moments. JOMO (the joy of missing out) is the emotionally intelligent antidote to FOMO and is essentially about being present and being content with where you are at in life. You do not need to compare your life to others but instead, practice tuning out the background noise of the "shoulds" and "wants" and learn to let go of worrying whether you are doing something wrong. JOMO allows us to live life in the slow lane, to appreciate human connections, to be intentional with our time, to practice saying "no," to give ourselves "tech‐free breaks," and to give ourselves permission to acknowledge where we are and to feel emotions. Instead of constantly trying to keep up with the rest of society, JOMO allows us to be who we are in the present moment. When you free up that competitive and anxious space in your brain, you have so much more time, energy, and emotion to conquer your true priorities.

[Unit 19 – 09~10]

Common sense suggests that discussion with others who express different opinions should produce more moderate attitudes for everyone in the group. Surprisingly, this is not always the case. In group polarization, a period of discussion pushes group members to take more extreme positions in the direction that they were already inclined to prefer. Group polarization does not reverse the direction of attitudes, but rather accentuates the attitudes held at the beginning. Two pressures appear to push individuals to take more extreme positions following a group discussion. First, conformity and desire for affiliation contribute to group polarization. If the majority of a group is leaning in a particular direction, what could be a better way of fitting in than agreeing with that majority, and maybe even taking its argument one step farther? There is also a tendency for likeminded people to affiliate with one another, which can provide reinforcement for existing opinions, increase people's confidence in those opinions, lead to the discovery of new reasons for those opinions and counterarguments to opposing views, and reduce exposure to conflicting ideas. Second, exposure to discussion on a topic introduces new reasons for maintaining an attitude. If you are already opposed to gun control and you listen to additional arguments supporting your position, you might end up more opposed than you were originally.

[Unit 19 – 11~12]

Being able to have a good fight doesn't just make us more civil; it also develops our creative muscles. In a classic study, highly creative architects were more likely than their technically competent but less original peers to come from homes with plenty of friction. They often grew up in households that were "tense but secure," as psychologist Robert Albert notes: "The creative person-to-be comes from a family that is anything but harmonious." The parents weren't physically or verbally abusive, but they didn't shy away from conflict, either. Instead of telling their children to be seen but not heard, they encouraged them to stand up for themselves. The kids learned to dish it out ― and take it. That's exactly what happened to Wilbur and Orville Wright, who invented the airplane. When the Wright brothers said they thought together, what they really meant is that they fought together. When they were solving problems, they had arguments that lasted not just for hours but for weeks and months at a time. They didn't have such ceaseless fights because they were angry. They kept quarreling because they enjoyed it and learned from the experience. I like scrapping with Orv, Wilbur reflected. As you'll see, it was one of their most passionate and prolonged arguments that led them to rethink a critical assumption that had prevented humans from soaring through the skies.

[Unit 19 – 13~14]

Stories populate our lives. If you are not a fan of stories, you might imagine that the best world is a world without them, where we can only see the facts in front of us. But to do this is to deny how our brains work, how they are designed to work. Evolution has given us minds that are alert to stories and suggestion because, through many hundreds of thousands of years of natural selection, minds that can attend to stories have been more successful at passing on their owners' genes. Think about what happens, for example, when animals face one another in conflict. They rarely plunge into battle right away. No, they first try to signal in all kinds of ways what the outcome of the battle is going to be. They puff up their chests, they roar, and they bare their fangs. Animals evolved to attend to stories and signals because these turn out to be an efficient way to navigate the world. If you and I were a pair of lions on the Serengeti, and we were trying to decide the strongest lion, it would be most foolish ─ for both of us ─ to plunge straight into a conflict. It is far better for each of us to make a show of strength, to tell the story of how our victory is inevitable. If one of those stories is much more convincing than the other, we might be able to agree on the outcome without actually having the fight.

[Unit 19 – 15~16]

In this day and age, it is difficult to imagine our lives without email. But how often do we consider the environmental impact of these virtual messages? At first glance, digital messages appear to save resources. Unlike traditional letters, no paper or stamps are needed; nothing has to be packaged or transported. Many of us tend to assume that using email requires little more than the electricity used to power our computers. It's easy to overlook the invisible energy usage involved in running the network ― particularly when it comes to sending and storing data. Every single email in every single inbox in the world is stored on a server. The incredible quantity of data requires huge server farms ― gigantic centres with millions of computers which store and transmit information. These servers consume massive amounts of energy, 24 hours a day, and require countless litres of water, or air conditioning systems, for cooling. The more messages we send, receive and store, the more servers are needed ― which means more energy consumed, and more carbon emissions. Clearly, sending and receiving electronic messages in an environmentally conscious manner is by no means enough to stop climate change. But with a few careful, mindful changes, unnecessary CO2 emissions can easily be avoided.

[Unit 19 – 17~18]

Paralysis by analysis is a state of overthinking and analyzing a particular problem, but you still end up not making a decision. One famous ancient fable of the fox and the cat explains this situation of paralysis by analysis in the simplest way. In the story, the fox and the cat discuss how many ways they have to escape their hunters. Cat quickly climbs a tree. Fox, on the other hand, begins to analyze all the ways to escape that he knows. But unable to decide which one would be the best, he fails to act and gets caught by the dogs. This story perfectly illustrates the analysis paralysis phenomenon: the inability to act or decide due to overthinking about available alternatives. People experience that although they start with a good intention to find a solution to a problem, they often analyze indefinitely about various factors that might lead to wrong decisions. They don't feel satisfied with the available information and think they still need more data to perfect their decision. Most often this situation of paralysis by analysis arises when somebody is afraid of making an erroneous decision that can lead to potential catastrophic consequences: It might impact their careers or their organizations' productivity. So that's why people are generally overcautious in making decisions that involve huge stakes.

[Unit 19 – 19~20]

Evolutionary biologists believe sociability drove the evolution of our complex brains. Fossil evidence shows that as far back as 130,000 years ago, it was not unusual for Homo sapiens to travel more than a hundred and fifty miles to trade, share food and, no doubt, gossip. Unlike the Neanderthals, their social groups extended far beyond their own families. Remembering all those connections, who was related to whom, and where they lived required considerable processing power. It also required wayfinding savvy. Imagine trying to maintain a social network across tens or hundreds of square miles of Palaeolithic wilderness. You couldn't send a text message to your friends to find out where they were ― you had to go out and visit them, remember where you last saw them or imagine where they might have gone. To do this, you needed navigation skills, spatial awareness, a sense of direction, the ability to store maps of the landscape in your mind and the motivation to travel around. Canadian anthropologist Ariane Burke believes that our ancestors developed all these attributes while trying to keep in touch with their neighbours. Eventually, our brains became primed for wayfinding. Meanwhile the Neanderthals, who didn't travel as far, never fostered a spatial skill set; despite being sophisticated hunters, well adapted to the cold and able to see in the dark, they went extinct. In the prehistoric badlands, nothing was more useful than a circle of friends.

[Unit 19 – 21~22]

U.S. commercial aviation has long had an extremely effective system for encouraging pilots to submit reports of errors. The program has resulted in numerous improvements to aviation safety. It wasn't easy to establish: pilots had severe self-induced social pressures against admitting to errors. Moreover, to whom would they report them? Certainly not to their employers. Not even to the Federal Aviation Authority (FAA), for then they would probably be punished. The solution was to let the National Aeronautics and Space Administration (NASA) set up a voluntary accident reporting system whereby pilots could submit semi-anonymous reports of errors they had made or observed in others. Once NASA personnel had acquired the necessary information, they would detach the contact information from the report and mail it back to the pilot. This meant that NASA no longer knew who had reported the error, which made it impossible for the airline companies or the FAA (which enforced penalties against errors) to find out who had submitted the report. If the FAA had independently noticed the error and tried to invoke a civil penalty or certificate suspension, the receipt of self-report automatically exempted the pilot from punishment. When a sufficient number of similar errors had been collected, NASA would analyze them and issue reports and recommendations to the airlines and to the FAA. These reports also helped the pilots realize that their error reports were valuable tools for increasing safety.

[Unit 19 – 23~24]

An organization imported new machinery with the capacity to produce quality products at a lesser price. A manager was responsible for large quantities in a relatively short span of time. He started with the full utilization of the new machinery. He operated it 24/7 at maximum capacity. He paid the least attention to downtime, recovery breaks or the general maintenance of the machinery. As the machinery was new, it continued to produce results and, therefore, the organization's profitability soared and the manager was appreciated for his performance. Now after some time, this manager was promoted and transferred to a different location. A new manager came in his place to be in charge of running the manufacturing location. But this manager realized that with heavy utilization and without any downtime for maintenance, a lot of the parts of the machinery were significantly worn and needed to be replaced or repaired. The new manager had to put significant time and effort into repair and maintenance of the machines, which resulted in lower production and thus a loss of profits. The earlier manager had only taken care of the goal of production and ignored the machinery although he had short‒term good results. But ultimately not giving attention to recovery and maintenance resulted in long‒term negative consequences.

[Unit 20 - 학평 ANALYSIS]

When Jack was a young man in his early twenties during the 1960s, he had tried to work in his father's insurance business, as was expected of him. His two older brothers fit in easily and seemed to enjoy their work. But Jack was bored with the insurance industry. It was worse than being bored, he said. I felt like I was dying inside. Jack felt drawn to hair styling and dreamed of owning a hair shop with a lively environment. He was sure that he would enjoy the creative and social aspects of it and that he'd be successful. When he was twenty-six, Jack approached his father and expressed his intentions of leaving the business to become a hairstylist. As Jack anticipated, his father raged and accused Jack of being selfish, ungrateful, and unmanly. In the face of his father's fury, Jack felt confusion and fear. His resolve became weak. But then a force filled his chest and he stood firm in his decision. In following his path, Jack not only ran three flourishing hair shops, but also helped his clients experience their inner beauty by listening and encouraging them when they faced dark times. His love for his work led to donating time and talent at nursing homes, which in turn led to becoming a hospice volunteer, and eventually to starting fundraising efforts for the hospice program in his community. And all this laid a strong stepping stone for another courageous move in his life. When, after having two healthy children of their own, Jack and his wife, Michele, decided to bring an orphaned child into their family, his father threatened to disown them. Jack understood that his father feared adoption, in this case especially because the child was of a different racial background than their family. Jack and Michele risked rejection and went ahead with the adoption. It took years but eventually Jack's father loved the little girl and accepted his son's independent choices. Jack realized that, although he often felt fear and still does, he has always had courage. In fact, courage was the scaffolding around which he had built richness into his life.

[Unit 20 – 01~03]

Henrietta is one of the greatest "queens of song." She had to go through a severe struggle before she attained the enviable position as the greatest singer Germany had produced. At the beginning of her career she was hissed off a Vienna stage by the friends of her rival, Amelia. But in spite of this defeat, Henrietta endured until all Europe was at her feet. Many years later, when Henrietta was at the height of her fame, one day she was riding through the streets of Berlin. Soon she came across a little girl leading a blind woman. She was touched by the woman's helplessness, and she impulsively beckoned the child to her, saying "Come here, my child. Who is that you are leading by the hand?" The answer was, "That's my mother, Amelia Steininger. She used to be a great singer, but she lost her voice, and she cried so much about it that now she can't see anymore." Henrietta inquired their address and then told the child, "Tell your mother an old acquaintance will call on her this afternoon." She searched out their place and undertook the care of both mother and daughter. At her request, a skilled doctor tried to restore Amelia's sight, but it was in vain. But Henrietta's kindness to her former rival did not stop here. The next week she gave a benefit concert for the poor woman, and it was said that on that occasion Henrietta sang as she had never sung before. And who can doubt that with the applause of that vast audience there was mingled the applause of the angels in heaven who rejoice over the good deeds of those below?

[Unit 20 – 04~06]

"It was a hot day in early fall. Wylder was heading to the school field for his first training. He had just joined the team with five other students after a successful tryout. Approaching the field, he saw players getting ready, pulling up their socks and strapping on shin guards. But they weren't together. New players were sitting in the shade by the garage, while the others were standing in the sun by the right pole. Then Coach McGraw came and watched the players. Coach McGraw, too, saw the pattern ― new kids and others grouping separately. 'This has to change,' he thought. He wanted a winning team. To do that, he needed to build relationships. I want you guys to come over here in the middle and sit, he called the players as he walked over. You! McGraw roared, pointing at Wylder. Come here onto the field and sit. And Jonny! You sit over there! He started pointing, making sure they mixed together. Wylder realized what Coach was trying to do, so he hopped onto the field. McGraw continued to point, calling each player out, until he was satisfied with the rearrangement. Okay, this is how it's going to be, he began. We need to learn how to trust and work with each other.	(20)	이게 팀이 경기하는 방식이야. This is how I want you to be on and off the field: together. The players looked at each other. Almost immediately, McGraw noticed a change in their postures and faces. He saw some of them starting to smile. 'Wow,' thought Wylder. From his new location on the grass, he stretched out his legs. He liked what he was hearing. A new sense of team spirit came across him, a deeper sense of connection. It was encouraging to hear Coach talk about this, to see him face the challenge head‑on. Now his speech was over. The players got up and started walking on the field to warm up. Good job, Coach. That was good, Wylder said to McGraw in a low voice as he walked past him, keeping his eyes down out of respect. “

[Unit 20 – 07~09]

The basketball felt like it belonged in Chanel's hands even though it was only a practice game. She decided not to pass the ball to her twin sister, Vasha. Instead, she stopped, jumped, and shot the ball toward the basket, but it bounced off the backboard. Chanel could see that her teammates were disappointed. The other team got the ball and soon scored, ending the game. When the practice game ended, Chanel felt her eyes sting with tears. It's okay, Vasha said in a comforting voice. Chanel appreciated her, but Vasha wasn't making her feel any better. Vasha wanted to help her twin improve. She invited her twin to practice with her. After school, they got their basketball and started practicing their basketball shots. At first, Chanel did not like practicing with Vasha because every time Vasha shot the ball, it went in. But whenever it was Chanel's turn, she missed. She got frustrated at not making a shot. Don't give up! Vasha shouted after each missed shot. After twelve misses in a row, her thirteenth shot went in and she screamed, "I finally did it!" Her twin said, "I knew you could! Now let's keep practicing!" The next day, Chanel played in the championship game against a rival school. It was an intense game and the score was tied when Chanel was passed the ball by Vasha, with ten seconds left in the game. She leaped into the air and shot the ball. It went straight into the basket! Chanel's last shot had made her team the champions. Vasha and all her other teammates cheered for her.

[Unit 20 – 10~12]

There was a very wealthy man who was bothered by severe eye pain. He consulted many doctors and was treated by several of them. He did not stop consulting a galaxy of medical experts; he was heavily medicated and underwent hundreds of injections. However, the pain persisted and was worse than before. At last, he heard about a monk who was famous for treating patients with his condition. Within a few days, the monk was called for by the suffering man. The monk understood the wealthy man's problem and said that for some time he should concentrate only on green colours and not let his eyes see any other colours. The wealthy man thought it was a strange prescription, but he was desperate and decided to try it. He got together a group of painters and purchased barrels of green paint and ordered that every object he was likely to see be painted green just as the monk had suggested. In a few days everything around that man was green. The wealthy man made sure that nothing around him could be any other colour. When the monk came to visit him after a few days, the wealthy man's servants ran with buckets of green paint and poured them all over him because he was wearing red clothes. He asked the servants why they did that. They replied, "We can't let our master see any other colour." Hearing this, the monk laughed and said "If only you had purchased a pair of green glasses for just a few dollars, you could have saved these walls, trees, pots, and everything else and you could have saved a large share of his fortune. You cannot paint the whole world green."

[Unit 20 – 13~15]

A businessman boarded a flight. Arriving at his seat, he greeted his travel companions: a middle-aged woman sitting at the window, and a little boy sitting in the aisle seat. After putting his bag in the overhead bin, he took his place between them. After the flight took off, he began a conversation with the little boy. He appeared to be about the same age as his son and was busy with a coloring book. He asked the boy a few usual questions, such as his age, his hobbies, as well as his favorite animal. He found it strange that such a young boy would be traveling alone, so he decided to keep an eye on him to make sure he was okay. About an hour into the flight, the plane suddenly began experiencing turbulence. The pilot told everyone to fasten their seat belts and remain calm, as they had encountered rough weather. As the plane rose and fell several times, people got nervous and sat up in their seats. The man was also nervous and grabbing his seat as tightly as he could. Meanwhile, the little boy was sitting quietly beside him. His coloring book and crayons were put away neatly in the seat pocket in front of him, and his hands were calmly resting on his legs. Incredibly, he didn't seem worried at all. Then, suddenly, the turbulence ended. The pilot apologized for the bumpy ride and announced that they would be landing soon. As the plane began its descent, the man said to the little boy, "You are just a little boy, but I have never met a braver person in all my life! Tell me, how is it that you remained so calm while all of us adults were so afraid?" Looking him in the eyes, he said, "My father is the pilot, and he's taking me home."

[Unit 20 – 16~18]

John was a sensitive boy. Even his hair was ticklish. When breeze touched his hair he would burst out laughing. And when this ticklish laughter started, no one could make him stop. John's laughter was so contagious that when John started feeling ticklish, everyone ended up in endless laughter. He tried everything to control his ticklishness: wearing a thousand different hats, using ultra strong hairsprays, and shaving his head. But nothing worked. One day he met a clown in the street. The clown was very old and could hardly walk, but when he saw John in tears, he went to cheer him up. It didn't take long to make John laugh, and they started to talk. John told him about his ticklish problem. Then he asked the clown how such an old man could carry on being a clown. I have no one to replace me, said the clown, "and I have a very serious job to do." And then he took John to many hospitals, shelters, and schools. All were full of children who were sick, or orphaned, children with very serious problems. But as soon as they saw the clown, their faces changed completely and lit up with a smile. That day was even more special, because in every show John's contagious laughter would end up making the kids laugh a lot. The old clown winked at him and said "Now do you see what a serious job it is? That's why I can't retire, even at my age." And he added, "Not everyone could do it. He or she has to have a special gift for laughter." This said, the wind again set off John's ticklishness and his laughter. After a while, John decided to replace the old clown. From that day onward, the fact that John was different actually made him happy, thanks to his special gift.

[Unit 20 – 19~21]

Jennifer was on her way home. She decided to stop at a gas station to get coffee. After she paid for her coffee, she got back into her car, but before she started it, she noticed a woman standing outside in front of the building. She could tell that the woman was homeless by her appearance. Her clothes were worn and she was nothing but skin and bones. She must have not had enough money to get something to eat. Jennifer thought to herself, feeling pity for her. Suddenly, a dog walked up to the front of the building. Being a dog lover, Jennifer noticed that the dog was a German Shepherd. She could also tell that the dog was a mother, because anyone could notice that she had been feeding puppies. The dog was terribly in need of something to eat and she felt so bad for her. She knew if the dog didn't eat soon, she and her puppies would not make it. Jennifer sat in her car, looking at the dog. She noticed that people were walking by without paying attention to the dog. But she still did not do anything. However, someone did. The homeless woman, who Jennifer thought did not have money to buy herself anything to eat, went into the store. And what she did brought tears to Jennifer's eyes. She had gone into the store, bought a can of dog food, and fed that dog. She looked so happy to do it as well. Watching the scene changed Jennifer's life entirely. You see, that day was Mother's Day. It took a homeless woman to show her what selfless giving and love is. From that day on, Jennifer has helped people in trouble, especially mothers struggling to raise children. The homeless woman made Jennifer a better person.

[Unit 20 – 22~24]

There once lived a girl named Melanie. She wanted to be a ballet dancer. One day, Melanie's mother saw her dancing with the flawless steps and enthusiasm of a ballerina. Isn't it strange? Melanie is dancing so well without any formal training! her mother said. I must get her professional lessons to help her polish her skill. The following day, Melanie accompanied her mother to a local dance institute. Upon meeting the dance teacher, Mr. Edler, her mother requested to admit Melanie to his institute. The teacher asked Melanie to audition. She was happy and showed him some of her favorite dance steps. However, he wasn't interested in her dance. He was busy with other tasks in the dance room. You can leave now! The girl is just average. Don't let her waste her time aspiring to be a dancer, he said. Melanie and her mother were shocked to hear this. Disappointed, they returned home, tears rolling down Melanie's cheeks. With her confidence and ego hurt, Melanie never danced again. She completed her studies and became a schoolteacher. One day, the ballet instructor at her school was running late, and Melanie was asked to keep an eye on the class so that they wouldn't roam around the school. Once inside the ballet room, she couldn't control herself. She taught the students some steps and kept on dancing for some time. Unaware of time or the people around her, she was lost in her own little world of dancing. Just then, the ballet instructor entered the classroom and was surprised to see Melanie's incredible skill. What a performance! the instructor said with a sparkle in her eyes. Melanie was embarrassed to see the instructor in front of her. Sorry, Ma'am! she said. For what? the instructor asked. You are a true ballerina! The instructor invited Melanie to accompany her to a ballet training center, and Melanie has never stopped dancing since. Today, she is a world‑renowned ballet dancer.

[Unit 20 – 25~27]

"Once upon a time there lived a poor but cheerful shoemaker. He was so happy, he sang all day long. The children loved to stand around his window to listen to him. Next door to the shoemaker lived a rich man. He used to sit up all night to count his gold. In the morning, he went to bed, but he could not sleep because of the sound of the shoemaker's singing. One day, he thought of a way of stopping the singing. He wrote a letter to the shoemaker asking him to visit. The shoemaker came at once, and to his surprise the rich man gave him a bag of gold. When he got home again, the shoemaker opened the bag. He had never seen so much gold before! When he sat down at his bench and began, carefully, to count it, the children watched through the window. There was so much there that the shoemaker was afraid to let it out of his sight. So he took it to bed with him. But he could not sleep for worrying about it. Very early in the morning, he got up and brought his gold down from the bedroom. He had decided to hide it up the chimney instead. But he was still uneasy, and in a little while he dug a hole in the garden and buried his bag of gold in it. It was no use trying to work. He was too worried about the safety of his gold. And as for singing, he was too miserable to utter a note. He could not sleep, or work, or sing ― and, worst of all, the children no longer came to see him. At last, the shoemaker felt so unhappy that he seized his bag of gold and ran next door to the rich man. Please take back your gold, he said. The worry of it is making me ill, and I have lost all of my friends.	I would rather be a poor shoemaker, as I was before."" And so the shoemaker was happy again and sang all day at his work. “

[Unit 20 – 28~30]

"You've been a very good girl this year, Emma.	Tonight, Santa will drop by our house to leave you some presents."" Martha told her little girl, smiling. And for you too, Fred, she added. She wanted to give her two children so much more, but this year had been especially hard for Martha. She had worked day and night to buy some Christmas gifts for her children. That night, after everyone had gone to bed, Emma slowly climbed out of bed. She took out a page from a notebook to write a letter to Santa. She whispered to herself as she wrote. Dear Santa, will you send a few smiles and laughs for my mother?	She doesn't laugh much. And will you send a few toys for Fred as well? Thank you."" Emma folded the letter twice and sealed it within an envelope. She left the envelope outside the front door and went back to sleep. Emma came running up to her mother the next morning. Mommy, Santa really did come last night! Martha smiled, thinking of the candies and cookies she must have found in her socks. Did you like his gifts? Yes, they are wonderful. Fred loves his toys, too. Martha was confused. She wondered how the candies and cookies had become toys overnight. Martha ran into Emma's room and saw a small red box that was half open. She knelt down and glanced inside to see its contents. The box contained some toys, countless little candies and cookies. Mommy, this is for you from Santa. Emma said holding out a card towards Martha. Puzzled, she opened it. It said, ""Dear Emma's mother. A very merry Christmas! Hi, I am Amelia. I found your child's letter blowing across the street last night. I was touched and couldn't help but respond. Please accept the gift as a Christmas greeting."" Martha felt tears falling down her cheeks. She slowly wiped them off and hugged her daughter. Merry Christmas, Emma. Didn't I tell you Santa would come? “

[Unit 20 – 31~33]

I was on a train in Switzerland. The train came to a stop, and the conductor's voice over the loudspeaker delivered a message in German, then Italian, then French. I had made the mistake of not learning any of those languages before my vacation. After the announcement, everyone started getting off the train, and an old woman saw I was confused and stressed. She came up to me. She spoke some English, and she told me that an accident had happened on the tracks. She asked me where I was trying to get to, then she got off the train and went to a woman in the ticket booth. The old woman got a rail map and timetable from her and came back to tell me that we'd have to hop trains three or four times to get there. I was really glad she was headed the same way because it would have been hopeless for me to figure it out on my own. So we went from one train station to the next, getting to know each other along the way. It was a 2.5hour journey in total, and when we finally made it to the destination, we got off and said our goodbyes. I had made it just in time to catch my train to Rome, and she told me she had a train to catch too. I asked her how much farther she had to go, and it turned out her home was two hours back the other way. She had jumped from train to train and traveled the whole way just to make sure I made it. You are the nicest person I've ever met, I said. She smiled gently and hugged me and told me I'd better hurry off so I wouldn't miss my train. This woman spent her entire day sitting on trains taking her hours away from her home just to help out a confused tourist visiting her country. No matter how many countries I visit or sites I see, I always say the most beautiful country in the world is Switzerland.

[Unit 20 – 34~36]

Maria Sutton was a social worker in a place where the average income was very low. Many of Maria's clients had lost their jobs when the coal industry in a nearby town collapsed. Every Christmas season, knowing how much children loved presents at Christmas, Maria tried to arrange a special visit from Santa Claus for one family. Alice, the seven‒year‒old daughter of Maria, was very enthusiastic about helping with her mother's Christmas event. This year's lucky family was a 25‒year‒old mother named Karen and her 3‒year‒old son, who she was raising by herself. However, things went wrong. Two weeks before Christmas Day, a representative from a local organization called Maria to say that the aid she had requested for Karen had fallen through. No Santa Claus. No presents. Maria saw the cheer disappear from Alice's face at the news. After hearing this, she ran to her room. When Alice returned, her face was set with determination. She counted out the coins from her piggy bank: $4.30. Mom, she told Maria, "I know it's not much. But maybe this will buy a present for the kid." Maria gave her daughter a lovely hug. The next day, Maria told her coworkers about her daughter's latest project. To her surprise, staff members began to open their purses. The story of Alice's gift had spread beyond Maria's office, and Maria was able to raise $300 ― plenty for a Christmas gift for Karen and her son. On Christmas Eve, Maria and Alice visited Karen's house with Christmas gifts. When Karen opened the door, Maria and Alice wished the astonished woman a merry Christmas. Then Alice began to unload the gifts from the car, handing them to Karen one by one. Karen laughed in disbelief, and said she hoped she would one day be able to do something similar for someone else in need. On her way home, Maria said to Alice, "God multiplied your gift."