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.
The fields of psychology and psychiatry are both essential in researching and developing treatment for improving mental and emotional health. Differences aside, psychologists and psychiatrists share a common goal: helping people feel better.