De psychometrische kwaliteiten van de General Assessment of Personality Disorder–83 (GAPD-83)

Abstract

This study presents a psychometric evaluation of the General Assessment of Personality Disorder -83 (GAPD-83), a self-report questionnaire for assessing the core components of personality dysfunction on the basis of Livesley’s (2003) model of personality dysfunction; i.e. adaptive failure model. The measure evaluates 2 major components of disordered personality: self or identity problems and interpersonal dysfunction. Four hundred and thirty-five participants aged 18-84 year participated in this study and filled in three questionnaires; the GAPD-83, the NEO-FFI and the SIPP SF. The results show that de GAPD-83 has a good reliability, a high validity and a factor structure which is in accordance with the underlying model. A two-component structure consistent with the two core components of personality dysfunction is found according to the underlying model, namely, self-pathology and interpersonal dysfunction. This means the GAPD-83 is a suitable instrument for assessing general dysfunction according to the model of personality dysfunction. Moreover, the GAPD-83 may contribute to a two-step integrated assessment of personality pathology that assesses both personality dysfunction and personality traits and can possibly be used in the future within the Alternative Model of DSM-5 Personality Disorders, as proposed in the DSM-5.