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.
Stockbyte/Stockbyte/Getty Images. Psychiatric evaluations are the mental health equivalent of a physical exam with a physician. Such evaluations are performed by psychiatrists to assess a person's mental status, thought processes, cognitive abilities and potential treatment options.