The factor structure of the Brief Psychiatric Rating Scale (Expanded Version) in a sample of forensic psychiatric patients
Number of pages
SourceInternational Journal of Offender Therapy and Comparative Criminology, 59, 7, (2015), pp. 743-756
Article / Letter to editor
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SW OZ BSI KLP
International Journal of Offender Therapy and Comparative Criminology
SubjectExperimental Psychopathology and Treatment
Severe behavioral problems, aggression, unlawful behavior, and uncooperativeness make the forensic psychiatric population both hard to treat and study. To fine-tune treatment and evaluate results, valid measurement is vital. The Brief Psychiatric Rating Scale-Extended (BPRS-E) is a widely used scale for assessing psychiatric symptoms, with a stable factor structure over various patient groups. For the first time, its usefulness for forensic psychiatric patients was studied by means of an exploratory factor analysis on 302 patients in a penitentiary psychiatric center. A five-factor solution fitted the data best and showed large overlap with previous research done in both in- and outpatient populations with schizophrenia and mixed diagnoses. Around 45% of the patients did not fully comply. Items relying most on self-report caused the most non-adherence, possibly because of difficulty with verbalizing distress. These items loaded on the factors psychosis and affect. The BPRS-E is a suitable instrument for forensic use. Future research and clinical practice should focus on alignment with forensic patients to improve measurement, understanding, and eventually therapeutic interventions.
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