Concurrent validity of the MCMI-II modifier indices

The relationships between the three Modifier Indices (Disclosure X, Desirability Y, and Debasement Z) of the Millon Clinical Multiaxial Inventory‐II (MCMI‐II) and the validity and clinical scales of the Minnesota Multiphasic Personality Inventory‐2 (MMPI‐2) were explored. A sample of 125 psychiatric inpatients was administered both personality measures within 7 days of admission. The pattern of Pearson correlation coefficients and principal component factors was seen as generally supporting the validity of the three MCMI‐II Modifier Indices. However, the Disclosure and Debasement Indices were highly intercorrelated and similar in their MMPI‐2 associations. The Desirability Index functioned in a more unique manner and demonstrated both convergent and divergent relationships with MMPI‐2 Validity and Clinical scales.