Abstract
Predicted that simple tests that require attention and motor speed would be able to differentiate paranoid schizophrenics from brain-damaged patients better than more complex, problem-solving neuropsychological tests. The strategy was to improve discrimination between schizophrenic and brain-damaged patients by selecting a schizophrenic subgroup with a recognized cognitive strong point. Fourteen organic, 14 paranoid schizophrenic, and 14 nonpsychotic psychiatric patients matched for sex, education, and IQ were tested. As predicted, the attention and speed measures differentiated the brain-damaged and paranoid groups, while the four more complex measures from the Halstead-Reitan Battery did not separate the groups. There were no significant differences between the two psychiatric groups.
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