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.
Psychiatrists are medical doctors who graduate from medical school, have a year of medical internship, and have 3 years of residency in the assessment and treatment of mental health disorders. Psychologists have a doctoral degree in an area of psychology, the study of the mind and human behavior. Theyâre not medical doctors. A psychologist can have a PhD in philosophy or a PsyD in clinical or counseling psychology. Typically, they do 1-2 years of internship. Unlike psychiatrists, psychologists are also trained in giving psychological tests (like IQ tests or personality tests).