Empirical assessment of the factorial structure of clinical symptoms in schizophrenia: negative symptoms.
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.
Keefe
R S
RS
Department of Psychiatry, Mount Sinai School of Medicine, New York, NY.
Harvey
P D
PD
Lenzenweger
M F
MF
Davidson
M
M
Apter
S H
SH
Schmeidler
J
J
Mohs
R C
RC
Davis
K L
KL
D000328:Adult; D000342:Affective Symptoms / Q000175:diagnosis / Q000523:psychology; D001143:Arousal; D002908:Chronic Disease; D003702:Delusions / Q000175:diagnosis / Q000523:psychology; D006212:Hallucinations / Q000175:diagnosis / Q000523:psychology; D006801:Humans; D008297:Male; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011594:Psychometrics; D012559:Schizophrenia / Q000175:diagnosis*; D012564:Schizophrenic Language; D012565:Schizophrenic Psychology; D012917:Social Adjustment; D012934:Social Isolation; D014705:Verbal Behavior