Statistical grouping of clinical symptoms and signs is one method of c
lassifying schizophrenia. This study attempted to find factors of symp
toms generated through clinical ratings on three scales, namely the Sc
ale for the Assessment of Positive Symptoms (SAPS), the Scale for the
Assessment of Negative Symptoms (SANS) and the Comprehensive Psychopat
hological Rating Scale (CPRS) in a sample of 80 stable chronic schizop
hrenics diagnosed by DSM-III-R. It was found that the positive-negativ
e dichotomy could not be replicated. Inappropriate affect was found to
be a clear misfit in the cluster of negative symptoms. Inclusion of C
PRS led to the generation of a factor loading high on depressive and a
sthenic items, and this could be clearly distinguished from the factor
of negative symptoms. This factor had not hitherto been identified.