The Tipping Point: How Little Things Can - By Gladwell, Malcolm Page 0,30

mastery over this reflex than others. Part of what it means to have a powerful or persuasive personality, then, is that you can draw others into your own rhythms and dictate the terms of the interaction. In some studies, students who have a high degree of synchrony with their teachers are happier, more enthused, interested, and easygoing. What I felt with Gau was that I was being seduced, not in the sexual sense, of course, but in a global way, that our conversation was being conducted on his terms, not mine. I felt I was becoming synchronized with him. “Skilled musicians know this, and good speakers,” says Joseph Cappella, who teaches at the Annenberg School of Communication at the University of Pennsylvania. “They know when the crowds are with them, literally in synchrony with them, in movements and nods and stillness in moments of attention.” It is a strange thing to admit, because I didn’t want to be drawn in. I was on guard against it. But the essence of Salesmen is that, on some level, they cannot be resisted. “Tom can build a level of trust and rapport in five to ten minutes that most people will take half an hour to do,” Moine says of Gau.

There is another, more specific dimension to this. When two people talk, they don’t just fall into physical and aural harmony. They also engage in what is called motor mimicry. If you show people pictures of a smiling face or a frowning face, they’ll smile or frown back, although perhaps only in muscular changes so fleeting that they can only be captured with electronic sensors. If I hit my thumb with a hammer, most people watching will grimace: they’ll mimic my emotional state. This is what is meant, in the technical sense, by empathy. We imitate each other’s emotions as a way of expressing support and caring and, even more basically, as a way of communicating with each other.

In their brilliant 1994 book Emotional Contagion, the psychologists Elaine Hatfield and John Cacioppo and the historian Richard Rapson go one step further. Mimicry, they argue, is also one of the means by which we infect each other with our emotions. In other words, if I smile and you see me and smile in response—even a microsmile that takes no more than several milliseconds—it’s not just you imitating or empathizing with me. It may also be a way that I can pass on my happiness to you. Emotion is contagious. In a way, this is perfectly intuitive. All of us have had our spirits picked up by being around somebody in a good mood. If you think about this closely, though, it’s quite a radical notion. We normally think of the expressions on our face as the reflection of an inner state. I feel happy, so I smile. I feel sad, so I frown. Emotion goes inside out. Emotional contagion, though, suggests that the opposite is also true. If I can make you smile, I can make you happy. If I can make you frown, I can make you sad. Emotion, in this sense, goes outside in.

If we think about emotion this way—as outside in, not inside out—it is possible to understand how some people can have an enormous amount of influence over others. Some of us, after all, are very good at expressing emotions and feelings, which means that we are far more emotionally contagious than the rest of us. Psychologists call these people “senders.” Senders have special personalities. They are also physiologically different. Scientists who have studied faces, for example, report that there are huge differences among people in the location of facial muscles, in their form, and also—surprisingly—even in their prevalence. “It is a situation not unlike in medicine,” says Cacioppo. “There are carriers, people who are very expressive, and there are people who are especially susceptible. It’s not that emotional contagion is a disease. But the mechanism is the same.”

Howard Friedman, a psychologist at the University of California at Riverside, has developed what he calls the Affective Communication Test to measure this ability to send emotion, to be contagious. The test is a self administered survey, with thirteen questions relating to things like whether you can keep still when you hear good dance music, how loud your laugh is, whether you touch friends when you talk to them, how good you are at sending seductive glances, whether you like to be the center of attention. The highest possible score on the