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COPYRIGHT 2002 All rights reserved. Reproduced by permission of The Condé Nast Publications Inc.
Some years ago, John Yarbrough was working patrol for the Los Angeles County Sheriff's Department. It was about two in the morning. He and his partner were in the Willowbrook section of South Central Los Angeles, and they pulled over a sports car. "Dark, nighttime, average stop," Yarbrough recalls. "Patrol for me was like going hunting. At that time of night in the area I was working, there was a lot of criminal activity, and hardly anyone had a driver's license. Almost everyone had something intoxicating in the car. We stopped drunk drivers all the time. You're hunting for guns or lots of dope, or suspects wanted for major things. You look at someone and you get an instinctive reaction. And the longer you've been working the stronger that instinctive reaction is."
Yarbrough was driving, and in a two-man patrol car the procedure is for the driver to make the approach and the officer on the passenger side to provide backup. He opened the door and stepped out onto the street, walking toward the vehicle with his weapon drawn. Suddenly, a man jumped out of the passenger side and pointed a gun directly at him. The two of them froze, separated by no more than a few yards. "There was a tree behind him, to his right," Yarbrough recalls. "He was about seventeen. He had the gun in his right hand. He was on the curb side. I was on the other side, facing him. It was just a matter of who was going to shoot first. I remember it clear as day. But for some reason I didn't shoot him." Yarbrough is an ex-marine with close-cropped graying hair and a small mustache, and he speaks in measured tones. "Is he a danger? Sure. He's standing there with a gun, and what person in his right mind does that facing a uniformed armed policeman? If you looked at it logically, I should have shot him. But logic had nothing to do with it. Something just didn't feel right. It was a gut reaction not to shoot--a hunch that at that exact moment he was not an imminent threat to me." So Yarbrough stopped, and, sure enough, so did the kid. He pointed a gun at an armed policeman on a dark street in South Central L.A., and then backed down.
Yarbrough retired last year from the sheriff's department after almost thirty years, sixteen of which were in homicide. He now lives in western Arizona, in a small, immaculate house overlooking the Colorado River, with pictures of John Wayne, Charles Bronson, Clint Eastwood, and Dale Earnhardt on the wall. He has a policeman's watchfulness: while he listens to you, his eyes alight on your face, and then they follow your hands, if you move them, and the areas to your immediate left and right--and then back again, in a steady cycle. He grew up in an affluent household in the San Fernando Valley, the son of two doctors, and he is intensely analytical: he is the sort to take a problem and break it down, working it over slowly and patiently in his mind, and the incident in Willowbrook is one of those problems. Policemen shoot people who point guns directly at them at two in the morning. But something he saw held him back, something that ninety-nine people out of a hundred wouldn't have seen.
Many years later, Yarbrough met with a team of psychologists who were conducting training sessions for law enforcement. They sat beside him in a darkened room and showed him a series of videotapes of people who were either lying or telling the truth. He had to say who was doing what. One tape showed people talking about their views on the death penalty and on smoking in public. Another featured a series of nurses who were all talking about a nature film they were supposedly watching, even though some of them were actually watching grisly documentary footage about burn victims and amputees. It may sound as if the tests should have been easy, because we all think we can tell whether someone is lying. But these were not the obvious fibs of a child, or the prevarications of people whose habits and tendencies we know well. These were strangers who were motivated to deceive, and the task of spotting the liars turns out to be fantastically difficult. There is just too much information--words, intonation, gestures, eyes, mouth--and it is impossible to know how the various cues should be weighted, or how to put them all together, and in any case it's all happening so quickly that you can't even follow what you think you ought to follow. The tests have been given to policemen, customs officers, judges, trial lawyers, and psychotherapists, as well as to officers from the F.B.I., the C.I.A., the D.E.A., and the Bureau of Alcohol, Tobacco, and Firearms--people one would have thought would be good at spotting lies. On average, they score fifty per cent, which is to say that they would have done just as well if they hadn't watched the tapes at all and just guessed. But every now and again--roughly one time in a thousand--someone scores off the charts. A Texas Ranger named David Maxwell did extremely well, for example, as did an ex-A.T.F. agent named J. J. Newberry, a few therapists, an arbitrator, a vice cop--and John Yarbrough, which suggests that what happened in Willowbrook may have been more than a fluke or a lucky guess. Something in our faces signals whether we're going to shoot, say, or whether we're lying about the film we just saw. Most of us aren't very good at spotting it. But a handful of people are virtuosos. What do they see that we miss?
All of us, a thousand times a day, read faces. When someone says "I love you," we look into that person's eyes to judge his or her sincerity. When we meet someone new, we often pick up on subtle signals, so that, even though he or she may have talked in a normal and friendly manner, afterward we say, "I don't think he liked me," or "I don't think she's very happy." We easily parse complex distinctions in facial expression. If you saw me grinning, for example, with my eyes twinkling, you'd say I was amused. But that's not the only way we interpret a smile. If you saw me nod and smile exaggeratedly, with the corners of my lips tightened, you would take it that I had been teased and was responding sarcastically. If I made eye contact with someone, gave a small smile and then looked down and averted my gaze, you would think I was flirting. If I followed a remark with an abrupt smile and then nodded, or tilted my head sideways, you might conclude that I had just said something a little harsh, and wanted to take the edge off it. You wouldn't need to hear anything I was saying in order to reach these conclusions. The face is such an extraordinarily efficient instrument of communication that there must be rules that govern the way we interpret facial expressions. But what are those rules? And are they the same for everyone?
In the nineteen-sixties, a young San Francisco psychologist named Paul Ekman began to study facial expression, and he discovered that no one knew the answers to those questions. Ekman went to see Margaret Mead, climbing the stairs to her tower office at the American Museum of Natural History. He had an idea. What if he travelled around the world to find out whether...
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