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J Psychiatr Res. 1993 Jul-Sep;27(3):253-8.

Validation of the 16-item Negative Symptom Assessment.

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  • 1Psychology Service (116B), Department of Veterans Affairs Medical Center, Allen Park, MI 48101.


The dimensional structure of the 16-item Negative Symptom Assessment (NSA-16) was validated in a sample of 223 unmedicated schizophrenic inpatients and cross-validated on an independent sample of 276 patients with schizophrenia. Using a confirmatory factor analytic procedure, a five factor model was found to best characterize the structure of this rating instrument. These factors include: Communication, Emotion/Affect, Social Involvement, Motivation, and Retardation. The latent structure of the NSA-16 is similar to the larger instrument from which it was derived. The findings provide support for a multidimensional model of negative symptoms in schizophrenia and offer a useful measure for their assessment.

[PubMed - indexed for MEDLINE]
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