Correlational studies of the Scale for the Assessment of Negative Symptoms and the Scale for the Assessment of Positive Symptoms: an overview and update.
The interrelationships between the various symptoms of schizophrenia may be explored by examining their intercorrelations. Five different factor analytic studies, which examine these interrelationships, are summarized. Three major factors emerge consistently: psychotic, disorganized, and negative. These three factors appear to represent three dimensions of the psychopathology of schizophrenia.
Andreasen
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NC
Mental Health Clinical Research Center, University of Iowa Hospitals and Clinics, College of Medicine, Iowa City.
Arndt
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S
Miller
D
D
Flaum
M
M
Nopoulos
P
P
D005163:Factor Analysis, Statistical; D006801:Humans; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011594:Psychometrics; D012559:Schizophrenia / Q000175:diagnosis*; D012562:Schizophrenia, Disorganized / Q000175:diagnosis / Q000523:psychology; D012565:Schizophrenic Psychology