Human beings are social animals, and our first instinct is to trust others. Con men, of course, have long known this - their craft consists largely of playing on this predilection, and turning it to their advantage.
But recently, behavioral scientists have also begun to unravel the inner workings of trust. Their aim is to decode the subtle signals that we send out and pick up, the cues that, often without our knowledge, shape our sense of someone's reliability.
From the Boston Globe.