Thinking, Fast and Slow

 

Selected by the New York Times Book Review as one of the best books of 2011 A Globe and Mail Best Books of the Year 2011 Title One of The Economist’s 2011 Books of the Year One of The Wall Steet Journal's Best Nonfiction Books of the Year 2011

Daniel Kahneman, recipient of the Nobel Prize in Economic Sciences for his seminal work in psychology that challenged the rational model of judgment and decision making, is one of our most important thinkers. His ideas have had a profound and widely regarded impact on many fields—including economics, medicine, and politics—but until now, he has never brought together his many years of research and thinking in one book.

In the highly anticipated Thinking, Fast and Slow, Kahneman takes us on a groundbreaking tour of the mind and explains the two systems that drive the way we think. System 1 is fast, intuitive, and emotional; System 2 is slower, more deliberative, and more logical. Kahneman exposes the extraordinary capabilities—and also the faults and biases—of fast thinking, and reveals the pervasive influence of intuitive impressions on our thoughts and behavior. The impact of loss aversion and overconfidence on corporate strategies, the difficulties of predicting what will make us happy in the future, the challenges of properly framing risks at work and at home, the profound effect of cognitive biases on everything from playing the stock market to planning the next vacation—each of these can be understood only by knowing how the two systems work together to shape our judgments and decisions.

Engaging the reader in a lively conversation about how we think, Kahneman reveals where we can and cannot trust our intuitions and how we can tap into the benefits of slow thinking. He offers practical and enlightening insights into how choices are made in both our business and our personal lives—and how we can use different techniques to guard against the mental glitches that often get us into trouble. Thinking, Fast and Slow will transform the way you think about thinking.

Editorial Reviews

Amazon.com Review

Amazon Best Books of the Month, November 2011: Drawing on decades of research in psychology that resulted in a Nobel Prize in Economic Sciences, Daniel Kahneman takes readers on an exploration of what influences thought example by example, sometimes with unlikely word pairs like "vomit and banana." System 1 and System 2, the fast and slow types of thinking, become characters that illustrate the psychology behind things we think we understand but really don't, such as intuition. Kahneman's transparent and careful treatment of his subject has the potential to change how we think, not just about thinking, but about how we live our lives. Thinking, Fast and Slow gives deep--and sometimes frightening--insight about what goes on inside our heads: the psychological basis for reactions, judgments, recognition, choices, conclusions, and much more.  --JoVon Sotak

Review

“A tour de force. . . Kahneman’s book is a must read for anyone interested in either human behavior or investing. He clearly shows that while we like to think of ourselves as rational in our decision making, the truth is we are subject to many biases. At least being aware of them will give you a better chance of avoiding them, or at least making fewer of them.”—Larry Swedroe, CBS News

“Daniel Kahneman demonstrates forcefully in his new book, Thinking, Fast and Slow, how easy it is for humans to swerve away from rationality.”—Christopher Shea, The Washington Post

“An outstanding book, distinguished by beauty and clarity of detail, precision of presentation and gentleness of manner. Its truths are open to all those whose System 2 is not completely defunct. I have hardly touched on its richness.”— Galen Strawson, The Guardian

“Brilliant . . . It is impossible to exaggerate the importance of Daniel Kahneman’s contribution to the understanding of the way we think and choose. He stands among the giants, a weaver of the threads of Charles Darwin, Adam Smith and Sigmund Freud. Arguably the most important psychologist in history, Kahneman has reshaped cognitive psychology, the analysis of rationality and reason, the understanding of risk and the study of happiness and well-being . . . A magisterial work, stunning in its ambition, infused with knowledge, laced with wisdom, informed by modesty and deeply humane. If you can read only one book this year, read this one.”— Janice Gross Stein, The Globe and Mail

“A sweeping, compelling tale of just how easily our brains are bamboozled, bringing in both his own research and that of numerous psychologists, economists, and other experts...Kahneman has a remarkable ability to take decades worth of research and distill from it what would be important and interesting for a lay audience...Thinking, Fast and Slow is an immensely important book. Many science books are uneven, with a useful or interesting chapter too often followed by a dull one. Not so here. With rare exceptions, the entire span of this weighty book is fascinating and applicable to day-to-day life. Everyone should read Thinking, Fast and Slow.” —Jesse Singal, Boston Globe

“We must be grateful to Kahneman for giving us in this book a joyful understanding of the practical side of our personalities.” —Freeman Dyson, The New York Review of Books

“Brilliant . . . It is impossible to exaggerate the importance of Daniel Kahneman’s contribution to the understanding of the way we think and choose. He stands among the giants, a weaver of the threads of Charles Darwin, Adam Smith and Sigmund Freud. Arguably the most important psychologist in history, Kahneman has reshaped cognitive psychology, the analysis of rationality and reason, the understanding of risk and the study of happiness and well-being . . . A magisterial work, stunning in its ambition, infused with knowledge, laced with wisdom, informed by modesty and deeply humane. If you can read only one book this year, read this one.” — Janice Gross Stein, The Globe and Mail

“It is an astonishingly rich book: lucid, profound, full of intellectual surprises and self-help value. It is consistently entertaining and frequently touching, especially when Kahneman is recounting his collaboration with Tversky . . . So impressive is its vision of flawed human reason that the New York Times columnist David Brooks recently declared that Kahneman and Tversky’s work ‘will be remembered hundreds of years from now,’ and that it is ‘a crucial pivot point in the way we see ourselves.’ They are, Brooks said, ‘like the Lewis and Clark of the mind’ . . . By the time I got to the end of Thinking, Fast and Slow, my skeptical frown had long since given way to a grin of intellectual satisfaction. Appraising the book by the peak-end rule, I overconfidently urge everyone to buy and read it. But for those who are merely interested in Kahenman’s takeaway on the Malcolm Gladwell question it is this: If you've had 10,000 hours of training in a predictable, rapid-feedback environment—chess, firefighting, anesthesiology—then blink. In all other cases, think.”—The New York Times Book Review

“Ask around and you hear pretty much the same thing. 'Kahneman is the most influential psychologist since Sigmund Freud,' says Christopher Chabris, a professor of psychology at Union College, in New York. 'No one else has had such a broad impact on so many fields' . . . It now seems inevitable that Kah­neman, who made his reputation by ignoring or defying conventional wisdom, is about to be anointed the intellectual guru of our economically irrational times.”— Evan R. Goldstein, The Chronicle of Higher Education

“There have been many good books on human rationality and irrationality, but only one masterpiece. That masterpiece is Daniel Kahneman’s Thinking, Fast and Slow . . . This is one of the greatest and most engaging collections of insights into the human mind I have read.”—William Easterly, Financial Times
“[Thinking, Fast and Slow] is wonderful, of course. To anyone with the slightest interest in the workings of his own mind, it is so rich and fascinating that any summary would seem absurd.”— Michael Lewis, Vanity Fair

“Absorbingly articulate and infinitely intelligent . . . What's most enjoyable and compelling about Thinking, Fast and Slow is that it's so utterly, refreshingly anti-Gladwellian. There is nothing pop about Kahneman's psychology, no formulaic story arc, no beating you over the head with an artificial, buzzword-encrusted Big Idea. It's just the wisdom that comes from five decades of honest, rigorous scientific work, delivered humbly yet brilliantly, in a way that will forever change the way you think about thinking.”—Maria Popova, The Atlantic

“I will never think about thinking quite the same. [Thinking, Fast and Slow] is a monumental achievement.”—Roger Lowenstein, Bloomberg/Businessweek

“Profound . . . As Copernicus removed the Earth from the centre of the universe and Darwin knocked humans off their biological perch, Mr. Kahneman has shown that we are not the paragons of reason we assume ourselves to be.” —The Economist

“[Kahneman’s] disarmingly simple experiments have profoundly changed the way that we think about thinking . . . We like to see ourselves as a Promethean species, uniquely endowed with the gift of reason. But Mr. Kahneman’s simple experiments reveal a very different mind, stuffed full of habits that, in most situations, lead us astray.” —Jonah Lehrer, The Wall Street Journal

“[A] tour de force of psychological insight, research explication and compelling narrative that brings together in one volume the high points of Mr. Kahneman's notable contributions, over five decades, to the study of human judgment, decision-making and choice . . . Thanks to the elegance and force of his ideas, and the robustness of the evidence he offers for them, he has helped us to a new understanding of our divided minds—and our whole selves.” —Christoper F. Chabris, The Wall Street Journal

“The ramifications of Kahenman’s work are wide, extending into education, business, marketing, politics . . . and even happiness research. Call his field “psychonomics,” the hidden reasoning behind our choices. Thinking, Fast and Slow is essential reading for anyone with a mind.” —Kyle Smith, The New York Post

“A major intellectual event . . . The work of Kahneman and Tversky was a crucial pivot point in the way we see ourselves.” —David Brooks, The New York Times

“Kahneman provides a detailed, yet accessible, description of the psychological mechanisms involved in making decisions.” —Jacek Debiec, Nature

“With Kahneman’s expert help, readers may understand this mix of psychology and economics better than most accountants, therapists, or elected representatives. VERDICT A stellar accomplishment, a book for everyone who likes to think and wants to do it better.” —Library Journal

“The mind is a hilariously muddled compromise between incompatible modes of thought in this fascinating treatise by a giant in the field of decision research. Nobel-winning psychologist Kahneman (Attention and Effort) posits a brain governed by two clashing decision-making processes. The largely unconscious System 1, he contends, makes intuitive snap judgments based on emotion, memory, and hard-wired rules of thumb; the painfully conscious System 2 laboriously checks the facts and does the math, but is so "lazy" and distractible that it usually defers to System 1. Kahneman uses this scheme to frame a scintillating discussion of his findings in cognitive psychology and behavioral economics, and of the ingenious experiments that tease out the irrational, self-contradictory logics that underlie our choices. We learn why we mistake statistical noise for cohere...

About the Author

Daniel Kahneman is Eugene Higgins Professor of Psychology Emeritus at Princeton University and a professor of public affairs at the Woodrow Wilson School of Public and International Affairs. He received the 2002 Nobel Prize in Economic Sciences for his pioneering work with Amos Tversky on decision-making.

Excerpt. © Reprinted by permission. All rights reserved.

THINKING, FAST AND SLOW (Chapter 1)The Characters of the StoryTo observe your mind in automatic mode, glance at the image below.

Figure 1

Your experience as you look at the woman's face seamlessly combines what we normally call seeing and intuitive thinking. As surely and quickly as you saw that the young woman's hair is dark, you knew she is angry. Furthermore, what you saw extended into the future. You sensed that this woman is about to say some very unkind words, probably in a loud and strident voice. A premonition of what she was going to do next came to mind automatically and effortlessly. You did not intend to assess her mood or to anticipate what she might do, and your reaction to the picture did not have the feel of something you did. It just happened to you. It was an instance of fast thinking.

Now look at the following problem:

17 × 24

You knew immediately that this is a multiplication problem, and probably knew that you could solve it, with paper and pencil, if not without. You also had some vague intuitive knowledge of the range of possible results. You would be quick to recognize that both 12,609 and 123 are implausible. Without spending some time on the problem, however, you would not be certain that the answer is not 568. A precise solution did not come to mind, and you felt that you could choose whether or not to engage in the computation. If you have not done so yet, you should attempt the multiplication problem now, completing at least part of it.

You experienced slow thinking as you proceeded through a sequence of steps. You first retrieved from memory the cognitive program for multiplication that you learned in school, then you implemented it. Carrying out the computation was a strain. You felt the burden of holding much material in memory, as you needed to keep track of where you were and of where you were going, while holding on to the intermediate result. The process was mental work: deliberate, effortful, and orderly--a prototype of slow thinking. The computation was not only an event in your mind; your body was also involved. Your muscles tensed up, your blood pressure rose, and your heart rate increased. Someone looking closely at your eyes while you tackled this problem would have seen your pupils dilate. Your pupils contracted back to normal size as soon as you ended your work--when you found the answer (which is 408, by the way) or when you gave up.

Two Systems

Psychologists have been intensely interested for several decades in the two modes of thinking evoked by the picture of the angry woman and by the multiplication problem, and have offered many labels for them. I adopt terms originally proposed by the psychologists Keith Stanovich and Richard West, and will refer to two systems in the mind, System 1 and System 2.

System 1 operates automatically and quickly, with little or no effort and no sense of voluntary control.

System 2 allocates attention to the effortful mental activities that demand it, including complex computations.The operations of System 2 are often associated with the subjective experience of agency, choice, and concentration.

The labels of System 1 and System 2 are widely used in psychology, but I go further than most in this book, which you can read as a psychodrama with two characters.

When we think of ourselves, we identify with System 2, the conscious, reasoning self that has beliefs, makes choices, and decides what to think about and what to do. Although System 2 believes itself to be where the action is, the automatic System 1 is the hero of the book. I describe System 1 as effortlessly originating impressions and feelings that are the main sources of the explicit beliefs and deliberate choices of System 2. The automatic operations of System 1 generate surprisingly complex patterns of ideas, but only the slower System 2 can construct thoughts in an orderly series of steps. I also describe circumstances in which System 2 takes over, overruling the freewheeling impulses and associations of System 1. You will be invited to think of the two systems as agents with their individual abilities, limitations, and functions.

In rough order of complexity, here are some examples of the automatic activities that are attributed to

System 1:

Detect that one object is more distant than another.

Orient to the source of a sudden sound.

Complete the phrase "bread and..."

Make a "disgust face" when shown a horrible picture.

Detect hostility in a voice.

Answer to 2 + 2 = ?

Read words on large billboards.

Drive a car on an empty road.

Find a strong move in chess (if you are a chess master).

Understand simple sentences.

Recognize that a "meek and tidy soul with a passion for detail" resembles an occupational stereotype.
 

All these mental events belong with the angry woman--they occur automatically and require little or no effort. The capabilities of System 1 include innate skills that we share with other animals. We are born prepared to perceive the world around us, recognize objects, orient attention, avoid losses, and fear spiders. Other mental activities become fast and automatic through prolonged practice. 

System 1 has learned associations between ideas (the capital of France?); it has also learned skills such as reading and understanding nuances of social situations. Some skills, such as finding strong chess moves, are acquired only by specialized experts. Others are widely shared. Detecting the similarity of a personality sketch to an occupational stereotype requires broad knowledge of the language and the culture, which most of us possess. The knowledge is stored in memory and accessed without intention and without effort.

Several of the mental actions in the list are completely involuntary. You cannot refrain from understanding simple sentences in your own language or from orienting to a loud unexpected sound, nor can you prevent yourself from knowing that 2 + 2 = 4 or from thinking of Paris when the capital of France is mentioned. Other activities, such as chewing, are susceptible to voluntary control but normally run on automatic pilot.

The control of attention is shared by the two systems. Orienting to a loud sound is normally an involuntary operation of System 1, which immediately mobilizes the voluntary attention of System 2. You may be able to resist turning toward the source of a loud and offensive comment at a crowded party, but even if your head does not move, your attention is initially directed to it, at least for a while. However, attention can be moved away from an unwanted focus, primarily by focusing intently on another target.The highly diverse operations of System 2 have one feature in common: they require attention and are disrupted when attention is drawn away. Here are some examples:

Brace for the starter gun in a race.

Focus attention on the clowns in the circus.

Focus on the voice of a particular person in a crowded and noisy room.

Look for a woman with white hair.

Search memory to identify a surprising sound.

Maintain a faster walking speed than is natural for you.

Monitor the appropriateness of your behavior in a social situation.

Count the occurrences of the letter a in a page of text.

Tell someone your phone number.

Park in a narrow space (for most people except garage attendants).

Compare two washing machines for overall value.

Fill out a tax form.

Check the validity of a complex logical argument.
 

In all these situations you must pay attention, and you will perform less well, or not at all, if you are not ready or if your attention is directed inappropriately. System 2 has some ability to change the way System 1 works, by programming the normally automatic functions of attention and memory. When waiting for a relative at a busy train station, for example, you can set yourself at will to look for a white-haired woman or a bearded man, and thereby increase the likelihood of detecting your relative from a distance. You can set your memory to search for capital cities that start with N or for French existentialist novels. And when you rent a car at London's Heathrow Airport, the attendant will probably remind you that "we drive on the left side of the road over here." In all these cases, you are asked to do something that does not come naturally, and you will find that the consistent maintenance of a set requires continuous exertion of at least some effort.

The oft en-used phrase "pay attention" is apt: you dispose of a limited budget of attention that you can allocate to activities, and if you try to go beyond your budget, you will fail. It is the mark of effortful activities that they interfere with each other, which is why it is difficult or impossible to conduct several at once. You could not compute the product of 17 × 24 while making a left turn into dense traffic, and you certainly should not try. You can do several things at once, but only if they are easy and undemanding. You are probably safe carrying on a conversation with a passenger while driving on an empty highway, and many parents have discovered, perhaps with some guilt, that they can read a story to a child while thinking of something else.

Everyone has some awareness of the limited capacity of attention, and our social behavior makes allowances for these limitations. When the driver of a car is overtaking a truck on a narrow road, for example, adult passengers quite sensibly stop talking. They know that distracting the driver is not a good idea, and they also suspect that he is temporarily deaf and will not hear what they say.

Intense focusing on a task can make people effectively blind, even to stimuli that normally attract attention. The most dramatic demonstration was offered by Christopher Chabris and Daniel Simons in their book The Invisible Gorilla. They constructed a short film of two teams passing basketballs, one team wearing white shirts, the other wearing black. The viewers of the film are instructed to count the number of passes made by the white team, ignoring the black players. This task is difficult ...