Psychologists study people: how they think, how they act, react and interact. They may conduct research, implement tests or specialize in a particular kind of treatment. Psychologists can deliver talk therapy treatments, but do not prescribe medication. Their focus is applying a scientific approach to helping people understand and change their behavior.Psychotherapists can have many different job titles, including psychologist and psychoanalyst. Their focus is on assessing a person’s concerns and applying the best-fit therapy for their patient’s unique situation. This can include art therapy, cognitive therapy or hypnotherapy, among many other treatments.