The Validity of MCMI-III (Millon,) Scales

The purpose of this study was to investigate the diagnostic validity of MCMI-III (Millon,) Scales in an Iranian population. The diagnostic validity of MCMI-III Scales was examined among psychiatric patients. Using operating characteristics (prevalence, sensitivity and specificity) of MCMI-III Scales, the predictive powers (positive, negative and overall) of the Scales was calculated. The results showed very good diagnostic validity for all MCM-III scales. Findings suggest MCMI-III Scales were found having high PPPs, NPPs and OPPs. The PPPs ranged from. to, and The NPPs ranged from to also OPPs ranged from to for all scales. Thus MCMI-III is a valid inventory and it can be used for Diagnosis personality disorders and clinical syndromes.