John Wilkes Booth was the son of prominent, wealthy actors. He, too, became an actor and was so popular, he was one of the first to have his clothes ripped off by fans. Hulton Archive/Getty hide caption
Psychology is the systematic investigation of the human mind, including behavior and cognition. It thus encompasses both normal and abnormal behavior. On the other hand, psychiatry is a branch of medicine dealing with mental illness.
Psychological evaluation has its roots in China in the 1800s. This primitive form of testing was used to determine peopleâs eligibility to hold public office. Those who wanted a position were locked in a room and wrote essays and poems for long periods of time. Those who passed moved onto the next round.