Reliability and validity of three screening measures of borderline personality disorder in a nonclinical population

This study explored reliability and validity of three self-report screening measures of borderline personality disorder (BPD): the Personality Assessment Inventory-Borderline Features Scale (PAI-BOR; Morey, 1991), Personality Diagnostic Questionnaire-4-BPD scale (PDQ4-BPD; Hyler, 1994) and Mclean Screening Instrument for BPD (MSI-BPD; Zanarini et al., 2003). Participants (N = 523) were drawn predominantly from community and student populations. All three measures were internally consistent. Confirmatory Factor Analysis of the PAI-BOR did not support Jackson and Trull’s (2001) six-factor structure or Morey’s (1991) four-factor structure. The three measures converged highly, despite the broader theoretical basis of the PAI-BOR. Expected demographic differences on the measures supported construct validity, and concurrent validity in relation to theoretical-related criteria was also supported. Only the PAI-BOR and PDQ4-BPD showed incremental validity in predicting specific criteria, although, the amount of unique variance predicted was small.