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BMC Psychiatry
Published in: BMC Psychiatry 1/2016

Open Access 01-12-2016 | Research article

The brief negative symptom scale: validation of the German translation and convergent validity with self-rated anhedonia and observer-rated apathy

Authors: Martin Bischof, Caitriona Obermann, Matthias N. Hartmann, Oliver M. Hager, Matthias Kirschner, Agne Kluge, Gregory P. Strauss, Stefan Kaiser

Published in: BMC Psychiatry | Issue 1/2016

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Abstract

Background

Negative symptoms are considered core symptoms of schizophrenia. The Brief Negative Symptom Scale (BNSS) was developed to measure this symptomatic dimension according to a current consensus definition. The present study examined the psychometric properties of the German version of the BNSS. To expand former findings on convergent validity, we employed the Temporal Experience Pleasure Scale (TEPS), a hedonic self-report that distinguishes between consummatory and anticipatory pleasure. Additionally, we addressed convergent validity with observer-rated assessment of apathy with the Apathy Evaluation Scale (AES), which was completed by the patient’s primary nurse.

Methods

Data were collected from 75 in- and outpatients from the Psychiatric Hospital, University Zurich diagnosed with either schizophrenia or schizoaffective disorder. We assessed convergent and discriminant validity, internal consistency and inter-rater reliability.

Results

We largely replicated the findings of the original version showing good psychometric properties of the BNSS. In addition, the primary nurses evaluation correlated moderately with interview-based clinician rating. BNSS anhedonia items showed good convergent validity with the TEPS.

Conclusions

Overall, the German BNSS shows good psychometric properties comparable to the original English version. Convergent validity extends beyond interview-based assessments of negative symptoms to self-rated anhedonia and observer-rated apathy.
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Metadata
Title
The brief negative symptom scale: validation of the German translation and convergent validity with self-rated anhedonia and observer-rated apathy
Authors
Martin Bischof
Caitriona Obermann
Matthias N. Hartmann
Oliver M. Hager
Matthias Kirschner
Agne Kluge
Gregory P. Strauss
Stefan Kaiser
Publication date
01-12-2016
Publisher
BioMed Central
Published in
BMC Psychiatry / Issue 1/2016
Electronic ISSN: 1471-244X
DOI
https://doi.org/10.1186/s12888-016-1118-9

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