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 is defined as a way of testing people about their behavior, personality, and capabilities to draw conclusions using combinations of techniques. Over the years, it has developed from unethical methods of locking people up for tests to the many different strategies seen today. We currently see evaluation being used in several different settings for multiple purposes, such as education or legal situations.