The Minnesota Multiphasic Personality Inventory (MMPI) is a psychological assessment tool used to evaluate personality traits and psychopathology. Developed in the late 1930s, it consists of a series of statements to which individuals respond as "true" or "false." The results help clinicians understand a person's mental health and guide treatment decisions. The MMPI is widely used in various settings, including clinical psychology, counseling, and legal cases. It includes several scales that measure different psychological conditions, such as depression, anxiety, and schizophrenia. The test is considered reliable and valid, making it a standard tool in psychological assessments.