ABSTRACT
The 11th version of the International Statistical Classification of Diseases and Related Health Problems (ICD-11) marks a paradigm shift in the diagnosis of personality disorders: In the near future, their classification will no longer be categorical, but dimensional along the severity of personality impairments and optionally regarding the presence of maladaptive personality traits. This study examines the reliability and validity of the German version of the Personality Inventory for ICD-11 (PiCD), a questionnaire designed to assess ICD-11 maladaptive personality domains, in a clinical and nonclinical sample (N=939). The factor structure of the PiCD was examined using Exploratory Factor Analysis (EFA) and showed a tendency for a four-factor model (Negative Affectivity, Dissociality, Detachment, and a bipolar factor Disinhibition-Anankastia). The subscales of the PiCD demonstrated acceptable to excellent reliability coefficients with Cronbach's α (0.79 - 0.89) and McDonald's ω (0.76 - 0.90). Convergent and discriminant validity were examined in conjunction with other questionnaires and were found to be satisfactory. The results suggest that the German version of the PiCD is a reliable and largely valid measurement instrument for assessing ICD-11 maladaptive personality traits. However, further research on factor structure, appropriate cut-off as well as norm values is needed.
Subject(s)
International Classification of Diseases , Personality Disorders , Humans , Reproducibility of Results , Diagnostic and Statistical Manual of Mental Disorders , Personality Disorders/diagnosis , Personality , Personality InventoryABSTRACT
INTRODUCTION: The alternative DSM-5 model of personality disorder (PD) links general criteria and severity of PD to impairments in self and interpersonal functioning. This approach is very similar to the Level of Structural Impairment Axis of the Operationalized Psychodynamic Diagnosis (OPD-2). In this study we investigate the relationship of these 2 approaches based on 2 new self-report questionnaires. METHODS: 228 psychotherapeutic inpatients filled out the OPD Structure Questionnaire (OPD-SQ), the General Assessment of Personality Disorder (GAPD), and the Patient Health Questionnaire (PHQ-D). RESULTS: The correlation between the latent general factors of OPD-SQ and GAPD was 0,91. After controlling for depressive symptoms the correlation was 0,86. DISCUSSION: The general factors of the OPD-SQ and the GAPD are almost identical. CONCLUSION: The OPD-SQ captures the general features of PD in terms of self-reported impairments in self and interpersonal functioning.
