What goes on in the brain of a psychopath? Are they really unable to control their aggressive behaviour? Would they lie on a psychopath test? My guest on this episode is David S. Chester, Ph.D., an Assistant Professor of social psychology at Virginia Commonwealth University, where he runs the Social Psychology and Neuroscience Laboratory in the College of Humanities and Sciences, and leads a research team that investigates the dark sides of human behavior, trying to discern the underpinnings of traits like violence, aggression and revenge. Follow David on Twitter to stay up to date with his research.