Comparison of three self-report measures of personality pathology

Abstract

Levels of convergence were examined among three personality instruments: the Personality Diagnostic Questionnaire-4+ (PDQ-4+), the Structured Clinical Interview for DSM-IV Axis II Personality Disorders Questionnaire (SCID-IIQ) and the Multi-source Assessment of Personality Pathology (MAPP). Each personality questionnaire was administered three times in an alternating sequence over nine consecutive weekdays to a sample of college students. There was some degree of convergence among the three instruments, but there were also substantial empirical differences between them. The data suggest three related conclusions: (1) in general, the self-report version of the MAPP is more conservative than the other two questionnaires, (2) these questionnaires are not interchangeable measures of personality disorders, and (3) the breadth of measurement provided varies as a function of both the questionnaire and the personality disorder being measured. © 2009 Springer Science+Business Media, LLC.