Most of us think we know what a psychopath looks like. The word brings to mind images of horror movies and criminals. But psychopathy is far more common than most people realize, and actually hard to recognize in other people. Abigail Marsh, PhD, of Georgetown University, discusses what researchers have learned about the causes of psychopathy and effective treatments for it, how to recognize psychopathy in those around you, and her work exploring the emotional processes and the brain differences that underlie both psychopathy and its opposite, extraordinary altruism. Links Abigail Marsh, PhD Speaking of Psychology Website