Blink: A Book about Rapid Cognition

(excerpts taken from http://www.gladwell.com/index.html)

1. What is "Blink" about?

It's a book about rapid cognition, about the kind of thinking that happens in a blink of an eye. When you meet someone for the first time, or walk into a house you are thinking of buying, or read the first few sentences of a book, your mind takes about two seconds to jump to a series of conclusions. Well, "Blink" is a book about those two seconds, because I think those instant conclusions that we reach are really powerful and really important and, occasionally, really good.

You could also say that it's a book about intuition, except that I don't like that word. In fact it never appears in "Blink." Intuition strikes me as a concept we use to describe emotional reactions, gut feelings--thoughts and impressions that don't seem entirely rational. But I think that what goes on in that first two seconds is perfectly rational. It's thinking--its just thinking that moves a little faster and operates a little more mysteriously than the kind of deliberate, conscious decision-making that we usually associate with "thinking." In "Blink" I'm trying to understand those two seconds. What is going on inside our heads when we engage in rapid cognition? When are snap judgments good and when are they not? What kinds of things can we do to make our powers of rapid cognition better?

2. How can thinking that takes place so quickly be at all useful? Don't we make the best decisions when we take the time to carefully evaluate all available and relevant information?

Certainly that's what we've always been told. We live in a society dedicated to the idea that we're always better off gathering as much information and spending as much time as possible in deliberation. As children, this lesson is drummed into us again and again: haste makes waste, look before you leap, stop and think. But I don't think this is true. There are lots of situations--particularly at times of high pressure and stress--when haste does not make waste, when our snap judgments and first impressions offer a much better means of making sense of the world.

One of the stories I tell in "Blink" is about the Emergency Room doctors at Cook County Hospital in Chicago. That's the big public hospital in Chicago, and a few years ago they changed the way they diagnosed heart attacks. They instructed their doctors to gather less information on their patients: they encouraged them to zero in on just a few critical pieces of information about patients suffering from chest pain--like blood pressure and the ECG--while ignoring everything else, like the patient's age and weight and medical history. And what happened? Cook County is now one of the best places in the United States at diagnosing chest pain.

Not surprisingly, it was really hard to convince the physicians at Cook County to go along with the plan, because, like all of us, they were committed to the idea that more information is always better. But I describe lots of cases in "Blink" where that simply isn't true. There's a wonderful phrase in psychology--"the power of thin slicing"--which says that as human beings we are capable of making sense of situations based on the thinnest slice of experience. I have an entire chapter in "Blink" on how unbelievably powerful our thin-slicing skills are. I have to say that I still find some of the examples in that chapter hard to believe.

3. Where did you get the idea for "Blink"?

Believe it or not, it's because I decided, a few years ago, to grow my hair long. If you look at the author photo on my last book, "The Tipping Point," you'll see that it used to be cut very short and conservatively. But, on a whim, I let it grow wild, as it had been when I was teenager. Immediately, in very small but significant ways, my life changed. I started getting speeding tickets all the time--and I had never gotten any before. I started getting pulled out of airport security lines for special attention. And one day, while walking along 14th Street in downtown Manhattan, a police van pulled up on the sidewalk, and three officers jumped out. They were looking, it turned out, for a rapist, and the rapist, they said, looked a lot like me. They pulled out the sketch and the description. I looked at it, and pointed out to them as nicely as I could that in fact the rapist looked nothing at all like me. He was much taller, and much heavier, and about fifteen years younger (and, I added, in a largely futile attempt at humor, not nearly as good-looking.) All we had in common was a large head of curly hair.

After twenty minutes or so, the officers finally agreed with me, and let me go. On a scale of things, I realize this was a trivial misunderstanding. African-Americans in the United State suffer indignities far worse than this all the time. But what struck me was how even more subtle and absurd the stereotyping was in my case: this wasn't about something really obvious like skin color, or age, or height, or weight. It was just about hair. Something about the first impression created by my hair derailed every other consideration in the hunt for the rapist, and the impression formed in those first two seconds exerted a powerful hold over the officers' thinking over the next twenty minutes. That episode on the street got me thinking about the weird power of first impressions.

4. But that's an example of a bad case of thin-slicing. The police officers jumped to a conclusion about you that was wrong. Does "Blink" talk about when rapid cognition goes awry?

Yes. That's a big part of the book as well. I'm very interested in figuring out those kinds of situations where we need to be careful with our powers of rapid cognition. For instance, I have a chapter where I talk a lot about what it means for a man to be tall. I called up several hundred of the Fortune 500 companies in the U.S. and asked them how tall their CEOs were. And the answer is that they are almost all tall. Now that's weird. There is no correlation between height and intelligence, or height and judgment, or height and the ability to motivate and lead people. But for some reason corporations overwhelmingly choose tall people for leadership roles. I think that's an example of bad rapid cognition: there is something going on in the first few seconds of meeting a tall person which makes us predisposed toward thinking of that person as an effective leader, the same way that the police looked at my hair and decided I resembled a criminal. I call this the "Warren Harding Error" (you'll have to read "Blink" to figure out why), and I think we make Warren Harding Errors in all kind of situations-- particularly when it comes to hiring. With "Blink," I'm trying to help people distinguish their good rapid cognition from their bad rapid cognition.

5. What kind of a book is "Blink"?

I used to get that question all the time with "The Tipping Point," and I never really had a good answer. The best I could come up with was to say that it was an intellectual adventure story. I would describe "Blink" the same way. There is a lot of psychology in this book. In fact, the core of the book is research from a very new and quite extraordinary field in psychology that hasn't really been written about yet for a general audience. But those ideas are illustrated using stories from literally every corner of society. In just the first four chapters, I discuss, among other things: marriage, World War Two code-breaking, ancient Greek sculpture, New Jersey's best car dealer, Tom Hanks, speed-dating, medical malpractice, how to hit a topspin forehand, and what you can learn from someone by looking around their bedroom. So what does that make "Blink?" Fun, I hope.

6. What do you want people to take away from "Blink"?

I guess I just want to get people to take rapid cognition seriously. When it comes to something like dating, we all readily admit to the importance of what happens in the first instant when two people meet. But we won't admit to the importance of what happens in the first two seconds when we talk about what happens when someone encounters a new idea, or when we interview someone for a job, or when a military general has to make a decision in the heat of battle.

"The Tipping Point" was concerned with grand themes, with figuring out the rules by which social change happens. "Blink" is quite different. It is concerned with the smallest components of our everyday lives--with the content and origin of those instantaneous impressions and conclusions that bubble up whenever we meet a new person, or confront a complex situation, or have to make a decision under conditions of stress. I think its time we paid more attention to those fleeting moments. I think that if we did, it would change the way wars are fought, the kind of products we see on the shelves, the kinds of movies that get made, the way police officers are trained, the way couples are counseled, the way job interviews are conducted and on and on--and if you combine all those little changes together you end up with a different and happier world.

In this excerpt, from the Introduction to "Blink," I describe the part of the brain that runs our rapid decision-making system:

Imagine that I asked you to a play a very simple gambling game. In front of you, are four decks of cards--two red and two blue. Each card in those four decks either wins you a sum of money or costs you some money, and your job is to turn over cards from any of the decks, one at a time, in such a way that maximizes your winnings. What you don't know at the beginning, however, is that the red decks are a minefield. The rewards are high, but when you lose on red, you lose a lot. You can really only win by taking cards from the blue decks, which offer a nice, steady diet of $50 and $100 payoffs. The question is: how long will it take you to figure this out?

A group of scientists at the University of Iowa did this experiment a few years ago, and what they found is that after we've turned over about fifty cards, most of us start to develop a hunch about what's going on. We don't know why we prefer the blue decks. But we're pretty sure, at that point, that they are a better bet. After turning over about eighty cards, most of us have figured the game out, and can explain exactly why the first two decks are such a bad idea. This much is straightforward. We have some experiences. We think them through. We develop a theory, and then finally we put two and two together. That's the way learning works. But the Iowa scientists did something else, and this is where the strange part of the experiment begins. They hooked each gambler up to a polygraph--a lie detector machine--that measured the activity of the sweat glands that all of us have below the skin in the palms of our hands. Most sweat glands respond to temperature. But those in our palms open up in response to stress--which is why we get clammy hands when we are nervous. What the Iowa scientists found is that gamblers started generating stress responses to red decks by the tenth card, forty cards before they were able to say that they had a hunch about what was wrong with those two decks. More importantly, right around the time their palms started sweating, their behavior began to change as well. They started favoring the good decks, and taking fewer and fewer cards from A and B. In other words, the gamblers figured the game out before they figured the game out: they began making the necessary adjustments long before they were consciously aware of what adjustments they were supposed to be making.

The Iowa study is just an experiment, of course, a simple card game involving a handful of subjects and a polygraph machine. But it's a very powerful illustration of the way our minds work. Here is a situation where the stakes were high, where things were moving quickly, and where the participants had to make sense of a lot of new and confusing information in a very short time--and what does the Iowa experiment tell us? That in those moments our brain uses two very different strategies to make sense of the situation. The first is the one we're most familiar with. It's the conscious strategy. We think about what we've learned, and eventually come up with an answer. This strategy is logical and definitive. But it takes us eighty cards to get there. It's slow. It needs a lot of information. There's a second strategy, though. It operates a lot more quickly. It starts to kick in after ten cards, and it's really smart because it picks up the problem with the red decks almost immediately. It has the drawback, however, that it operates--at least at first--entirely below the surface of consciousness. It sends its messages through weirdly indirect channels, like the sweat glands on the palms of our hands. It's a system in which our brain reaches conclusions without immediately telling us that it's reaching conclusions.