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 tests are written, visual, or verbal evaluations administered to assess the cognitive and emotional functioning of children and adults.Psychological tests are used to assess a variety of mental abilities and attributes, including achievement and ability, personality, and neurological functioning.ost achievement and ability tests are standardized, meaning that norms were established during the design phase of the test by administering the test to a large representative sample of the test population.