<human>:  What is the difference between a psychologist and a psychiatrist?
<bot>: The main difference between a psychologist and a psychiatrist is that a psychiatrist is a medical doctor who specializes in the diagnosis and treatment of mental health conditions, while a psychologist is a mental health professional who has completed a doctoral degree in psychology and typically focuses on providing psychotherapy. Psychiatrists are often able to prescribe medications to treat mental health conditions, whereas psychologists generally only use talk therapy.