The passage given below is followed by a set of questions. Choose the most appropriate answer to each question. The greatest challenge in understanding the role of randomness in life is that although the basic principles of randomness arise from everyday logic, many of the consequences that follow from those principles prove counterintuitive. In the mid-1960s, Daniel Kahneman, a psychologist, was lecturing a group of Israeli air force flight instructors on the conventional wisdom of behaviour modification and its application to the psychology of flight training. He drove home the point that rewarding positive behaviour works, but punishing mistakes does not. One of his students interrupted, saying 'I've often praised people warmly for beautifully executed manoeuvres, and the next time they always do worse. And I've screamed at people for badly executed manoeuvres, and by and large the next time they improve. Don't tell me that reward works and punishment doesn't.' The other flight instructors agreed. To Kahneman, the flight instructors' experiences rang true. On the other hand, he believed in the animal experiments that demonstrated that reward works better than punishment. He ruminated on this apparent paradox. The answer lies in a phenomenon called regression towards the mean. That is, in any series of random events an extraordinary event is most likely to be followed, purely due to chance, by a more ordinary one. Here is how it works: The student pilots all had a certain personal ability to fly fighter planes. Raising their skill level involved many factors and required extensive practise, so although their skill was slowly improving through flight training, the change wouldn't be noticeable from one manoeuvre to the next. Any especially good or especially poor performance was thus mostly a matter of luck. So if a pilot made an exceptionally good landing - one far above his normal level of performance - then the odds would be good that he would perform closer to his norm - that is, worse - the next day. And if his instructor had praised him, it would appear that the praise had done no good. But if a pilot made an exceptionally bad landing, then the odds would be good that the next day he would perform closer to his norm - that is, better. And if his instructor had a habit of screaming 'you clumsy ape' when a student performed poorly, it would appear that his criticism did some good. In reality, it made no difference at all. This error in intuition spurred Kahneman's thinking. How widespread, he wondered, was this misunderstanding of uncertainty? Do we make other misjudgements when faced with uncertainty? And what are its implications for human decision making? Kahneman found that even among sophisticated subjects when it came to random processes, people's beliefs and intuition very often let them down. Suppose four publishers have rejected the manuscript for your novel. Your intuition might say that the rejections by all those publishing experts mean that your manuscript is no good. But is your intuition correct? Is your novel unsellable? We all know from experience that if several tosses of a coin come up heads, it doesn't mean we are tossing a two-headed coin. Could it be that publishing success is so unpredictable that even if our novel is destined for the best-seller list, numerous publishers could miss the point and reject it? One book in the 1950s was initially rejected by publishers with such comments as 'very dull' and 'a dreary record of typical family bickering, petty annoyances and adolescent emotions. Today, that book, The Diary of a Young Girl by Anne Frank, has sold 30 million copies, making it one of the best-selling books in history.
MULTIPLE CHOICE QUESTION
Try yourself: According to the passage, which of the following best explains the apparently paradoxical observation that ‘reward doesn’t improve performance but punishment does’?
A
The basic principle of randomness is that rewarding positive behavior works but punishing mistakes does not.
B
Experiments in animal behavior have proved that reward works better than punishment.
C
Punishing mistakes merely preceded the improvement but contrary to appearances, did not cause it.
D
Punishing mistakes tends to force the person making a mistake to be more careful the next time, hence causes an improvement the next time, just as praise makes one complacent.
Correct Answer: C
The second paragraph explains the flight instructor’s argument that rewards don’t work, but punishment helps to improve performance. The paragraph ends with, “he (Daniel Kahneman) ruminated on this paradox.” Then, his explanation is given in the next paragraph. “The answer lies in a phenomenon called regression towards the mean. That is, in any series of random events an extraordinary event is most likely to be followed, purely due to chance, by a more ordinary one.” This is then explained with the example of student pilots – that there is no cause-effect or any kind of relation between punishment/reward and performance (except randomness). Options 1, 2, and 4 are thus incorrect because a cause-effect relationship is implied in them. Option 3 states Kahneman’s explanation explicitly. Hence the correct answer is option 3.
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MULTIPLE CHOICE QUESTION
Try yourself: Which of the following can be inferred from the student pilots’ flight training example?
A
An excellent performance of a student at any time is an aberration and has no basis in behaviour modification and its application in psychology.
B
Students should be complimented constantly if they have to improve their performance gradually.
C
Students who have been screamed at with regularity, in spite of how they perform, are more likely to better their performance than others who have never been screamed at.
D
Students who maintain regularity of practice are more likely to gradually improve their performance which may not be noticeable from one test to the next.
Correct Answer: D
Options 2 and 3 are eliminated because they imply a cause-effect relationship between screaming/rewarding and improvement in performance whereas the passage shows such an observation is merely a coincidence. Option 1 is incorrect because an excellent performance need not always be an aberration, but a result of skill achieved through long periods of practice. Option 4 is correct because the passage states, “The student pilots all had a certain personal ability to fly fighter planes. Raising their skill level involved many factors and required extensive practice, so although their skill was slowly improving through flight training, the change wouldn’t be noticeable from one maneuver to the next.” Hence the correct answer is option 4.
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MULTIPLE CHOICE QUESTION
Try yourself: All these are examples of ‘regression towards the mean’ EXCEPT:
A
When there was a sudden increase in burglaries in a particular city, the number of policemen in the city were increased, due to which the number of burglaries went down.
B
Mahesh, a politician, seemed set to win the next election, but his popularity went down abruptly after a scandal regarding his personal life became known.
C
Diego, a football player, broke the record for goals scored in one season, but the next season, he scored far fewer goals, leading critics to wonder if he had lost his talent.
D
Previously, Sonia didn’t believe in homeopathic medicine, but when her particularly bad migraine got better after she took some homeopathic medicine, she decided that there must be something to it.
Correct Answer: B
The definition of regression towards the mean given in the passage is: ‘in any series of random events, an extraordinary event is most likely to be followed, purely due to chance, by a more ordinary one’. In option 1, the sudden increase in burglaries could be a purely random event, which would go down to ordinary levels – i.e. regress towards the mean – on its own, so the attribution of the decrease to the increase in policemen is a misunderstanding of a case of regression towards the mean. Similarly, extreme events such as breaking a record for goals scored and a particularly bad migraine in 3 and 4 respectively could simply have regressed to the mean – i.e. the number of goals could have gone down and the migraine would have got better – due to chance, so both 3 and 4 also demonstrate a misunderstanding of a case of regression towards the mean. Only 2 is not necessarily such a case: a scandal would have a clear and sudden negative effect on a politician’s popularity, which would not be the result of random chance. Note: there is no series of random events in 2. Hence, 2.
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MULTIPLE CHOICE QUESTION
Try yourself: The example of Anne Frank’s book proves that …
A
Publishers are not good judges of the quality of literature.
B
Writers should keep trying to get their books published, even if they are rejected by multiple publishers.
C
Success in publishing depends mainly on chance, not the quality of the work.
D
Intuition is not a good guide to predicting which books will be successful.
Correct Answer: D
The example of Anne Frank’s book is given as a way of showing how intuitions about the possible success of a book (in this case, the publishers’ intuitions) are not a good guide to predicting whether or not a book will be successful, which depends considerably on chance. So 4 sums up the point it is meant to prove. 3 may be inferable, but it is not the point of the example. 2, while being good advice for writers, is irrelevant to the issues of chance and intuition that the passage focuses on. Similarly, 1 doesn’t keep the bigger picture in mind and doesn’t tie up the example to the main idea of the passage. Hence,4.
1. What is the importance of practice questions in exam preparation?
Ans. Practice questions play a crucial role in exam preparation as they help students understand the format, structure, and types of questions that may appear in the actual exam. By practicing these questions, students can assess their knowledge, identify areas of improvement, and gain confidence in tackling different question types.
2. Are the practice questions in this article specifically designed for a particular exam?
Ans. Yes, the practice questions in this article are designed to cater to a specific exam. These questions are carefully crafted to align with the exam's syllabus and cover the important topics that students need to focus on for their preparation.
3. How can practicing these questions enhance my time management skills during the exam?
Ans. Practicing these questions can greatly improve your time management skills during the exam. By attempting a variety of questions within a given time limit, you will learn to allocate your time efficiently for each question. This practice will help you pace yourself during the actual exam, ensuring that you can complete all the questions within the allocated time frame.
4. Can I rely solely on practicing these questions to pass the exam?
Ans. While practicing these questions is an essential part of exam preparation, it is important to have a comprehensive study plan that includes understanding the concepts, revising the material, and practicing questions from different sources. Simply relying on practicing these questions may not be sufficient to pass the exam, but it can significantly enhance your preparation and increase your chances of success.
5. How should I analyze my performance while practicing these questions?
Ans. It is crucial to analyze your performance while practicing these questions. Keep track of the questions you answered correctly and those you struggled with. Identify the areas where you need improvement and focus your efforts on those topics. Additionally, reviewing the explanation provided for each question can help you understand the reasoning behind the correct answer and further strengthen your understanding of the subject matter.
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