... more than about 50 percent of the time. You might as well flip a coin...deception close to 100 percent of the time. She has found about 47 such people...micro-expressions by liars include the nose wrinkle, the nose rub and the covering of..., and he started taking anthropology courses, studying all sorts of behavior cues. He ..., "Love Signals: A Practical Field Guide to the Body Language of Courtship" ...