In a recent New Yorker, the New Republic editor who was duped by Stephen Glass takes a skeptical look at brain scan lie detectors. Along the way we learn: “People hold a stereotype of the liar—as tormented, anxious, and conscience-stricken,” … In fact, many liars experience what deception researchers call “duping delight.” … When people tell complicated lies, they frequently pause longer and more often, and speak more slowly; but if the lie is simple, or highly polished, they tend to do the opposite. Clumsy deceivers are sometimes visibly agitated, but, over all, liars are less likely to blink, to move their hands and feet, or to make elaborate gestures. …