Add Yahoo as a preferred source to see more of our stories on Google. Leanne ten Brinke is a social psychologist specializing in dark personality traits. In her new book, "Poisonous People," she ...

In 1806, French doctor Philippe Pinel created a category of mental disorder, manie sans délire, or insanity without delirium, which was a forerunner to modern psychopathy. 1 His case studies of some ...

Psychopathy isn't an official diagnosis; however, it's used to describe traits such as a lack of empathy, aggressiveness, and ...

One of the most enduring ideas about crime — and violence more broadly — is that a lot of it is committed by people we call “psychopaths.” If you didn’t grow up with procedurals like “Law & Order: SVU ...

Asking unexpected, open-ended questions can throw liars off, said Leanne ten Brinke, a psychology researcher specializing in dark personalities.Olga Rolenko/Getty Images Malicious people may live ...