Validation of a 4-item Negative Symptom Assessment (NSA-4): a short, practical clinical tool for the assessment of negative symptoms in schizophrenia

Author:

Alphs Larry1,Morlock Robert1,Coon Cheryl2,Cazorla Pilar3,Szegedi Armin3,Panagides John3

Affiliation:

1. Pfizer Global R&D; Ann Arbor MI USA

2. RTI Health Solutions; Research Triangle Park NC USA

3. Schering-Plough; Summit NJ USA

Publisher

Wiley

Subject

Psychiatry and Mental health

Reference15 articles.

1. A depression rating scale for schizophrenics;Addington;Schizophrenia Research,1990

2. Validation of the 16-item Negative Symptom Assessment;Axelrod;Journal of Psychiatric Research,1993

3. Persistent negative symptoms in schizophrenia: An overview;Buchanan;Schizophrenia Bulletin,2007

4. A power primer;Cohen;Psychological Bulletin,1992

5. Coefficient alpha and the internal structure of tests;Cronbach;Psychometrika,1951

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