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Factor structure of the negative symptom assessment

B N Axelrod1, R S Goldman, J L Woodard

  • 1Department of Veterans Affairs Medical Center, Allen Park, MI 48101.

Psychiatry Research
|May 1, 1994
PubMed
Summary

The Negative Symptom Assessment (NSA) scale

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Area of Science:

  • Psychiatry
  • Clinical Psychology
  • Neuroscience

Background:

  • Negative symptoms are a core feature of schizophrenia, impacting patient functioning.
  • Accurate assessment of negative symptoms is crucial for treatment and research.
  • The Negative Symptom Assessment (NSA) is a widely used rating scale.

Purpose of the Study:

  • To systematically evaluate the factor structure of the Negative Symptom Assessment (NSA).
  • To confirm the underlying dimensions measured by the NSA scale in schizophrenia patients.

Main Methods:

  • Confirmatory factor analyses were performed.
  • The study included 223 inpatients diagnosed with schizophrenia.

Main Results:

  • A six-factor model provided the best fit for the NSA data.
  • The identified factors were Communication, Emotion/Affect, Social Involvement, Motivation, Gross Cognition, and Retardation.
  • This structure supports a multidimensional view of negative symptoms.

Conclusions:

  • The NSA scale's factor structure aligns with a multidimensional conceptualization of negative symptoms.
  • The findings validate the use of the NSA for assessing specific negative symptom domains in schizophrenia.

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