Then they ran 108 volunteers through extensive interviews and a battery of tests that measure patterns of deception. The idea was that liars would be over-represented at these agencies a history of repeated lying would likely make it hard to keep a steady job. The researchers began by gathering volunteers from temporary employment agencies in the Los Angeles area.
So Yang and her team chose to focus their study on people who have a history of repeated lying and seem not to be able to control their lying (hereafter called simply, "liars").
The label "pathological liar" gets used in a variety of ways, and there's no standard psychological definition or test to measure if someone is a pathological liar. But surprisingly, the liars in their study actually had a surplus - specifically, they had more connections in the part of their brains responsible for complex thinking. They expected to see some kind of deficit in the brains of these liars, Yang says. The study was led by Yaling Yang, a doctoral student in psychology at the University of Southern California, and Adrian Raine, an expert on antisocial disorders who is now at University of Pennsylvania. In 2005, a study published in The British Journal of Psychiatry provided the first evidence of structural differences in the brains of people with a history of persistent lying. But some people lie repeatedly and compulsively, about things both big and small. But usually we tell little lies, like "your new haircut looks great!" And most of us can control when we lie or what we lie about. We all lie - once a day or so, according to most studies. 'British Journal of Psychiatry' Commentary: Sean Spence, a professor of psychiatry at University of Sheffield, shares his view of the study
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