Screening for Personality Disorders: A Three-Item Screener From the Inventory of Interpersonal Problems (IIP-3)

To encourage screening for personality disorders (PDs), we developed (in previous work) self-report scales for PDs using the Inventory of Interpersonal Problems (IIP). The combined score from three of the scales—inter-personal sensitivity, interpersonal ambivalence, and aggression—requiring 15 items (IIP-15) did the best job of distinguishing between respondents with any versus no PD. The goals for the present work were (a) to cross-validate the IIP-15 by examining its performance using receiver operating characteristics (ROC) analyses in a new sample (N = 410), and (b) to investigate the utility of a brief three-item variant (IIP-3). The present results again documented the good operating characteristics of the IIP-15. Sensitivity, specificity, and positive and negative predictive values were all above. 70. The operating characteristics of the IIP-3 were nearly as good despite its brevity and support its use as an initial screen for PDs.