Das Basel Screening Instrument für Psychosen (BSIP): Entwicklung, aufbau, reliabilität und validität

Translated title of the contribution: The Basel Screening Instrument for Psychosis (BSIP): Development, structure, reliability and validity

Anita Riecher-Rössler*, J. Aston, J. Ventura, M. Merlo, S. Borgwardt, U. Gschwandtner, R. D. Stieglitz

*Corresponding author for this work
120 Citations (Scopus)


Background: Early detection of psychosis is of growing clinical importance. So far there is, however, no screening instrument for detecting individuals with beginning psychosis in the atypical early stages of the disease with sufficient validity. We have therefore developed the Basel Screening Instrument for Psychosis (BSIP) and tested its feasibility, interrater-reliability and validity. Aim: Aim of this paper is to describe the development and structure of the instrument, as well as to report the results of the studies on reliability and validity. Method: The instrument was developed based on a comprehensive search of literature on the most important risk factors and early signs of schizophrenic psychoses. The interraterreliability study was conducted on 24 psychiatric cases. Validity was tested based on 206 individuals referred to our early detection clinic from 3/1/2000 until 2/28/2003. Results: We identified seven categories of relevance for early detection of psychosis and used them to construct a semistructured interview. Interrater-reliability for high risk individuals was high (Kappa .87). Predictive validity was comparable to other, more comprehensive instruments: 16 (32%) of 50 individuals classified as being at risk for psychosis by the BSIP have in fact developed frank psychosis within an follow-up period of two to five years. Conclusions: The BSIP is the first screening instrument for the early detection of psychosis which has been validated based on transition to psychosis. The BSIP is easy to use by experienced psychiatrists and has a very good interrater-reliability and predictive validity.

Translated title of the contributionThe Basel Screening Instrument for Psychosis (BSIP): Development, structure, reliability and validity
Original languageGerman
JournalFortschritte der Neurologie Psychiatrie
Issue number4
Pages (from-to)207-216
Number of pages10
Publication statusPublished - 04.2008


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