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Am J Psychiatry 1997; 154:635-639
Copyright © 1997 by American Psychiatric Association
Schizophrenia and the myth of intellectual decline
AJ Russell, JC Munro, PB Jones, DR Hemsley and RM Murray
Department of Clinical Psychology, Institute of Psychiatry, London, U.K.
OBJECTIVE: The authors' goal was to investigate the issue of intellectual
deterioration in schizophrenia. METHOD: They examined the childhood IQs of
adult patients with schizophrenia who had attended a child psychiatry
service where measurement of intelligence was routine. Follow-up IQs of 34
of these patients were obtained an average of 19.4 years later. RESULTS:
The mean child and adult IQs were greater than one standard deviation lower
than those of the general population. There were no significant differences
between the child and adult IQs, however, suggesting that the impairment in
intelligence during childhood was stable over the follow-up period.
CONCLUSIONS: The deficit in intellectual function observed in these
patients, and reported in the literature, is lifelong and predates the
onset of schizophrenia.
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