Payne and his colleagues conducted two related experiments in which white and Asian Americans viewed on a computer screen a picture of a man, quickly followed by a picture of a either a tool or a gun. Both pictures were visible for only about a fifth of a second each.
http://www.sciencedaily.com/releases/20 ... 094639.htm
Make you wonder why?
When asked to identify within less than one second -- whether the second picture was a tool or a gun, participants were much more likely to misidentify a tool as a gun when the preceding picture was that of an African American.
They were more likely to misidentify a gun as a tool when the preceding picture was that of a white man.