Utility of the minnesota multiphasic personality inventory personality disorder scales with adolescent psychiatric inpatients

Abstract

Personality disorders play an important role in the treatment of many adult psychiatric disorders. Current research has begun to examine the role of personality disorders in adolescent psychopathology. Unfortunately, there is limited research available to document the reliability and validity of personality disorder assessment measures for use with adolescent psychiatric patients. The Minnesota Multiphasic Personality Inventory (MMPI) Personality Disorder Scales have shown adequate psychometric properties with adult samples, but have not been tested using adolescents. The present study was designed to examine the utility of the MMPI Personality Disorder Scales with 217 adolescent psychiatric inpatients. A multivariate analysis of variance revealed males scored significantly higher than females on the schizoid, narcissistic, and antisocial scales, a pattern that has been found in adult psychiatric patients. Also, the MMPI Personality Disorder Scales correlated in patterns consistent with research on adult samples. In addition, the MMPI Personality Disorder Scales were meaningfully correlated with the Tridimensional Personality Questionnaire. However, factor analysis revealed a different factor structure than that found with adults. The similarities between adolescent and adult data suggest that the assessment of personality disorders in adolescents may provide useful clinical information on the development of personality disorders.