Psychologists conduct both basic and applied research, serve as consultants to communities and organizations, diagnose and treat people, and teach future psychologists and other types of students. They test intelligence and personality. They assess behavioral and mental function and well-being, stepping in to help where appropriate. They study how human beings relate to each other and also to machines, and they work to improve these relationships. And with America undergoing large changes in its population makeup, psychologists bring important knowledge and skills to understanding diverse cultures.
Many psychologists work independently.
Thus we find them in laboratories, hospitals, courtrooms, schools and universities, community health centers, prisons, and corporate offices. Psychologists traditionally study both normal and abnormal functioning, and also treat patients with mental and emotional problems. Today, they are increasingly concentrating on behaviors that affect the mental and emotional health and mental processes of healthy human beings. For example, they work with business executives, performers, and athletes to combat stress and improve performance. They advise lawyers on jury selection and collaborate with educators on school reform.