The performance of 24 hospitalized schizophrenic subjects was compared with that of 15 normal control subjects on three matched visual information-processing tasks. Each of the three tasks involved deciding on the relative magnitude of two groups of letters; and the two experimental conditions, one where irrelevant distracting stimuli were added and the other where response demands were increased, were matched for discriminating power with a neutral condition. There was a significant difference between groups on all three tasks; however, schizophrenic subjects were not found to be specifically sensitive to the effects of visual distraction or increased response complexity.
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