Stability of the Personality and Symptom Scales of the Millon Clinical Multiaxial Inventory

This study examines the stability of the basic and pathological personality and symptom scales of the Millon Clinical Multiaxial (MCMI) in three clinical samples. Consistent with the theory upon which the MCMI is based, higher stability estimates were found among basic personality scales in comparison with symptom scales. However, stability estimates which included initial MCMI administrations at intake into treatment were generally lower than those based upon administrations which occurred later in the treatment process. This later finding suggests the need to consider timing of administration when interpreting the MCMI.