From Newsweek:
The Ghosts We Think We See
Normal brain functions, such as seeing patterns, make us more likely to believe in the supernatural.Bruce Hood usually conducts experiments under much more rigorous conditions than this, but since he had a large audience one recent evening in London, the University of Bristol psychology professor figured he’d seize the opportunity. Holding up an old cardigan, he asked if anyone would be willing to wear it if he paid them £20 (about $40). Every hand shot up. Then Hood added that the sweater had been worn by a notorious murderer. All but a couple of hands disappeared. “People view evil as something physical, even tangible, and able to infect the sweater” as easily as lice, Hood says. That idea helps explain a number of supernatural beliefs, he argues: “The idea of spirits and souls appearing in this world becomes more plausible if we believe in general that the nonphysical can transfer over to the physical world.”