Concurrent validity of the clinical symptom syndrome scales of the Millon Clinical Multiaxial Inventory.

This study examined relationships between the clinical symptom syndrome scales of the Millon Clinical Multiaxial Inventory (MCMI) and the various clinically meaningful mood or symptom states measured by the six Profile of Mood States (POMS) scales (N = 243). The MCMI symptom scale--POMS symptom/mood scale relationships found in this study were compared with MCMI symptom scale--MMPI and SCL-90 symptom/mood scale relationships reported in the MCMI manual (Millon, 1983). Results of the present investigation, when combined with results of the previous analyses reported in the MCMI manual, reveal a number of consistent associations of moderate strength between MCMI symptom scales and selected mood or symptom scales from the MMPI and Symptom Checklist-90 as well as from the POMS. Although most relationships between the MCMI symptom scales and the symptom/mood scales of the POMS, MMPI and SCL-90 were consistent with expectation, the Anxiety, Dysthymia and Psychotic Depression scales of the MCMI show limited ability to discriminate appropriately between anxiety and depression in several of the concurrent validity analyses considered herein.