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Psychopathy and internalizing psychopathology

Jochem Willemsen & Paul Verhaeghe

International Journal of Law and Psychiatry

Volume 35, Issue 4, July–August 2012, Pages 269–275

 

Abstract

There is general consensus in clinical and research literature that the core feature of psychopathy consists of an affective deficit. However, previous studies tend to find weak and inconsistent associations between psychopathy and measures of internalizing psychopathology. In this study we test whether the predominant practice of using questionnaires to assess internalizing psychopathology has influenced the results of previous research. We argue that questionnaires measure general distress rather than specific symptoms of internalizing psychopathology, and that the validity of questionnaires might be impaired by psychopathic traits, such as impression management and lack of affective experience. Combining a questionnaire (Depression Anxiety Stress Scales-21; DASS-21) and a semi-structured interview (Structured Clinical Interview for DSM-IV-R Axis 1 Disorders; SCID-I) for internalizing psychopathology, we test the differential association of both measures with the Psychopathy Checklist—Revised (PCL-R) in a sample of 89 male detainees. In accordance with our prediction, we found moderate negative associations between the Interpersonal and Affective facets of the PCL-R and SCID-I, but no significant associations with the DASS-21. We found no evidence that psychopathic traits decrease the validity of the responses on a questionnaire. We conclude that the interpersonal and affective features of psychopathy are negatively related to specific symptoms of internalizing psychopathology, but not with general distress.

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