The New York Times:
In a classic work by Lady Gaga, she boasts, “No, he can’t read my poker face.” But according to a paper in the journal Psychological Science, she should be more worried about her arm and hand movements, at least when playing poker. “Even though professional players may be able to regulate their facial expressions, their motor actions could betray the quality of their poker hand,” the authors wrote. In three studies, psychologists asked undergraduates to watch clips of professional poker players placing bets; it turned out that smooth and confident arm motions while pushing the chips were the surest signal of a good hand.
Read the story at: The New York Times