Intelligence and neuropsychological functioning in psychiatric disorders.
The present report examines consistency across four psychiatric conditions (schizophrenia, schizoaffective disorder, manic disorder, and depression) on neuropsychological dysfunction assessed by two different instruments, the Halstead-Reitan and Luri-Nebraska batteries, in relation to WAIS-IQ. Results indicated that the impairment scale from the Luria-Nebraska has a stable relationship to IQ across diagnostic groups. In contrast, the impairment index from the Halstead-Reitan battery shows a diagnosis-dependent relationship. Schizophrenics, schizoaffective and manic disorder subjects show a more uniform linear relationship. This is contrary to expectation given Halstead's (1947) distinction between "biological" and psychometric intelligence. The findings are discussed from the standpoint of clinical severity and outcome associated with contemporary diagnostic formulations of nonschizophrenic affective disorders.
Illinois State Psychiatric Institute, Chicago 60612, USA.
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ML
Silverstein
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C
McDonald
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L
Fogg