[Development of a 12-item version of the OPD-Structure Questionnaire (OPD-SQS)]. / Entwicklung einer Zwölf-Item-Version des OPD-Strukturfragebogens (OPD-SFK).

OBJECTIVES: Screening for personality dysfunction is relevant to treatment planning in psychotherapy, psychosomatic medicine and psychiatry. This makes short versions of field-tested approaches such as the OPD Structure Questionnaire (OPD-SQ) necessary. METHODS: With the aim of developing a screening version, the original sample of the OPD-SQ was divided into two subsamples. After developing a preliminary 12-item version in one subsample, we used confirmatory factor-analysis in the second subsample as well as an independent sample to test the factor structure. RESULTS: The analyses confirmed a structure of three correlating factors with adequate fit indices. Other findings relating to the validity of the long version were replicated as well. In addition, data from an independent sample of psychotherapy inpatients confirmed the factor structure and provided further evidence for its validity. CONCLUSIONS: The OPD-SQS is a viable screening instrument for supporting clinical decision making in stepped-care approaches in psychotherapy, psychosomatic medicine and psychiatry.

[The OPD Structure Questionnaire (OPD-SQ): first results on reliability and validity]. / Der OPD-Strukturfragebogen (OPD-SF): Erste Ergebnisse zu Reliabilität und Validität.

The concept of psychic structure plays a central role in the Operationalised Psychodynamic Diagnosis (OPD) system. Until recently, its reliable and valid assessment had to be based on expert ratings of clinical interviews, limiting the use of the OPD in routine measurements and research, and excluding the patients' perspective. The current study describes the development and evaluation of a questionnaire on the OPD structure axis (OPD-SQ) in several clinical and non-clinical samples (N = 1 112). The questionnaire demonstrated good internal consistency for all the sub-scales of the OPD-SQ. Differences in mean values between the samples and between patients with vs. without personality disorders were as expected. We also found correlations with other relevant aspects of personality (attachment security, neuroticism). There were no to minimal effect of age and gender. The OPD-SQ is a helpful tool for a broad use in clinical routine as well as research projects.