" We tend to judge people’s honesty based on their demeanor. Well-spoken, confident people with a firm handshake who are friendly and engaging are seen as believable. Nervous, shifty, stammering, uncomfortable people who give windy, convoluted explanations aren’t. In a survey of attitudes toward deception conducted a few years ago, which involved thousands of people in fifty-eight countries around the world, 63 percent of those asked said the cue they most used to spot a liar was “gaze aversion.” We think liars in real life behave like liars would on Friends—telegraphing their internal states with squirming and darting eyes. This is—to put it mildly—nonsense. Liars don’t look away. But Levine’s point is that our stubborn belief in some set of nonverbal behaviors associated with deception explains the pattern he finds with his lying tapes. The people we all get right are the ones who match—whose level of truthfulness happens to correspond with the way they look. "
― Malcolm Gladwell , Talking to Strangers: What We Should Know About the People We Don’t Know