The Minnesota Multiphasic Personality Inventory (MMPI) is a psychological test that assesses personality traits and psychopathology. The MMPI-2, which has 567 true/false questions, the MMPI-2 is a widely used test because of its existing large research base and familiarity among psychologists. The MMPI is considered a protected psychological instrument, meaning it can only be given and interpreted by a psychologist trained to do.The MMPI has built-in clinical scales that describe a person’s psychological processes and how they respond to stress. Each scale is made of a specific group of questions (unknown to the test taker), which the test developer’s field research says indicates a particular psychological condition. The MMPI also has built-in validity scales designed to identify how a person approached the test, such as whether they attempted to present themselves differently from how they actually view themselves.