Are all villains in movies psychopaths? No. But are all serial killers in movies psychopaths? That's also no, as revealed by an actual scientific study of 400 movies released over the past century.

Led by a professor in Belgium, the examination of psychopathy in cinema lasted three years and resulted in a final list of 126 characters (105 of them male) that qualified for the diagnosis.

You can read the whole report in the latest issue of the Journal of Forensic Sciences. But here is a summary of some of its findings, via Tech Insider:

Anton Chigurh (Javier Bardem) of No Country for Old Men was determined to be the most realistic psychopath ever to hit the big screen, because "he seems to be effectively invulnerable and resistant to any form of emotion or humanity."

Surprisingly, the following characters were deemed not actual psychopaths: Patrick Bateman (Christian Bale) of American Psycho, Gordon Gekko (Michael Douglas) of Wall Street and Hannibal Lecter (Anthony Hopkins) of The Silence of the Lambs.

Norman Bates (Anthony Perkins) of Psycho is also not a psychopath, despite what the title implies, instead being labeled a delusional psychotic.

Hans Beckert (Peter Lorre) of Fritz Lang's 1931 German masterpiece M came in second place after Chigurh. The child killer was classified more specifically as a "pseudopsychopath," or sociopath. 

Another less famous movie character rounded the top three: Henry Lee Lucas (Michael Rooker) of 1990's Henry: Portrait of a Serial Killer. The study concludes that he's a "textbook idiopathic psychopath."