Personality disorder concept scales and 16 PF dimensions

Using 148 clients from a private practice sample, concurrent scores on the Morey, Waugh, and Blashfield Minnesota Multiphasic Personality Inventory Scales and the Sixteen Personality Factor Questionnaire were factor analyzed in an attempt to map the Axis II disorders within a circumplex of interpersonal behavior. Individual predictions about the 16 PF primaries were made and then equations were developed to predict the Morey, Waugh, Blashfield MMPI scales from the 16 PF scores. Using a separate sample of 43 clients and 21 students, a cross-validation of concepts was performed by using the 16 PF to generate the MMPI scores and correlating the predicted scores with concurrent Millon Clinical Multiaxial Inventory scores. Concordance of the personality disorder characterizations across the instruments was high. Many of the predicted personality disorder characteristics were supported by the research, and 10 of 11 correlations with the Millon were significant. This research suggests the 16 PF is useful for generating hypotheses about personality disorders and that the Axis II conceptualizations fit as expected within normal personality space.