Can an online quiz spot a psychopath?

Online quizzes claim to unmask the psychopaths among us. But just how accurate are these tests?
People are fascinated by the nature of the psychopathic personality. Lurid tales of con men and serial killers capture our imagination and feature prominently in films like No Country For Old Men and Silence of the Lambs. Recent popular books on the topic like The Psychopath Test and The Wisdom of Psychopaths have brought psychopathy into the public consciousness, claiming to unmask the psychopaths am