[From “The History of an American Obsession: The Lie Detectors” by Ken Alder.]
“Despite this warning, the search for Momus’s window has continued down the centuries. The Greeks developed a science of physiognomy to assess people’s character from their facial features and gestures. On the assumption that anxious deceivers generated less saliva, uspected liars in ancient China were asked to chew a bowl of rice and spit it out. Judges in India scanned for curling toes. One pious Victorian physician suggested that God had endowed human beings with the capacity to blush so as to make their deceptions apparent. Today, you can pick up the basics of body language for a few bucks on almost any library resale
table – ‘Who’s Lying to You and Who’s Lusting for You!’ – along with guides for potting tricksters when you travel abroad. Popular manuals, updated with the latest findings of neuroscience, advise you how to track the eye movements and hand gestures of your spouse, boss, and stockbroker.