Empirical assessment of the factorial structure of clinical symptoms in schizophrenia: negative symptoms

Psychiatry Res. 1992 Nov;44(2):153-65. doi: 10.1016/0165-1781(92)90049-9.

Abstract

The factor structure of the Scale for the Assessment of Negative Symptoms (SANS) was examined in a confirmatory factor analysis that used the LISREL procedure. Four models of negative symptom factors were tested in 130 hospitalized schizophrenic patients. A three-factor model of diminished expression, social dysfunction, and disorganization generated by the authors yielded a superior fit to the data relative to the two-factor model of Liddle (1987b) and a unifactorial severity model. A four-factor model based on the original subscale formulation of the SANS failed to fit the data.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adult
  • Affective Symptoms / diagnosis
  • Affective Symptoms / psychology
  • Arousal*
  • Chronic Disease
  • Delusions / diagnosis
  • Delusions / psychology
  • Hallucinations / diagnosis
  • Hallucinations / psychology
  • Humans
  • Male
  • Psychiatric Status Rating Scales / statistics & numerical data*
  • Psychometrics
  • Schizophrenia / diagnosis*
  • Schizophrenic Language
  • Schizophrenic Psychology*
  • Social Adjustment
  • Social Isolation
  • Verbal Behavior