Final answer:
The MCMI-III is a psychological assessment tool used to measure personality traits and psychopathology. It is typically used with individuals who are 18 years old and above.
Step-by-step explanation:
The MCMI-III, or Millon Clinical Multiaxial Inventory-III, is a psychological assessment tool used to measure personality traits and psychopathology. It is often used by psychologists and therapists to aid in diagnosis and treatment planning. The age range for the MCMI-III varies, but it is typically used with individuals who are 18 years old and above.