On the outside, your boss may be smooth, charming and professional. But is your manager actually a corporate psychopath like Patrick Bateman from the film American Psycho?

Normal on the outside, the high-flying executive is really a violent and highly dangerous serial killer. Bateman, played by Christian Bale (pictured), is more interested in murders and executions than mergers and acquisitions.

Two of the world’s leading experts on psychopaths have devised a test to find out if they have infiltrated the world’s top companies. Professor Robert Hare and Dr Paul Babiak believe psychopaths have personality characteristics well-suited to today’s business world.

Around 1% of North America’s population has psychopathic traits. The late newspaper tycoon Robert Maxwell, who raided his company’s pension funds, has been named as a classic example of a real life ‘psycho boss’.