The four types of psychological tests are clinical interview, behavioral assessment, personality assessment and an assessment of intellectual functioning, also called an IQ test. Most of these tests are written and performed in a psychologist's office.
The clinical interview lasts from 1-2 hours and consists of things like a patient talking about his childhood and other stages in life. If necessary, the psychologist will administer an IQ test to find out the scope of a patient's intelligence. From there, a personality assessment may be given to find out the complexities of a patient's personality. Finally, a behavior assessment may be conducted to find out why a patient behaves as he does and the motivation behind his behavior.