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Factor structure of the Brief Negative Symptom Scale.
Gregory P Strauss1, L Elliot Hong, James M Gold
1University of Maryland School of Medicine, Department of Psychiatry and Maryland Psychiatric Research Center, Baltimore, MD 21228, USA. gstrauss@mprc.umaryland.edu
Schizophrenia Research
|October 16, 2012
Summary
The Brief Negative Symptom Scale (BNSS) has two distinct factors: motivation/pleasure and emotional expressivity. This study supports the BNSS
Area of Science:
- Psychiatry
- Psychometrics
Background:
- Negative symptoms are crucial in schizophrenia.
- The Brief Negative Symptom Scale (BNSS) was developed to assess these symptoms.
- Previous research suggests a multi-factor structure for negative symptoms.
Purpose of the Study:
- To examine the factor structure of the Brief Negative Symptom Scale (BNSS).
- To validate the BNSS as a measure of negative symptoms in schizophrenia.
Main Methods:
- Principal axis factoring was used to analyze data from 146 individuals with schizophrenia or schizoaffective disorder.
- The Brief Negative Symptom Scale (BNSS) was administered to participants.
Main Results:
- Two distinct factors were identified, explaining 68.7% of the variance.
- These factors corresponded to motivation/pleasure and emotional expressivity.
- Findings align with prior research on negative symptom dimensions.
Conclusions:
- The study supports the construct validity of the BNSS.
- Evidence is provided for a two-factor model of negative symptoms (motivation/pleasure and emotional expressivity).
- The BNSS is a reliable instrument for assessing negative symptoms.
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