THE EFFECT OF BRIEF SENSORY DEPRIVATION AND SENSORY STIMULATION ON THE COGNITIVE FUNCTIONING OF CHRONIC SCHIZOPHRENICS

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Abstract
Reaction time, size estimation and Stroop color-word tasks were given to 15 good premorbid nonparanoid and 15 poor premorbid nonparanoid chronic schizophrenics before and after sensory deprivation (S-D), sensory stimulation (S-S) and a control (C) or neutral condition. Good premorbid Ss had significantly slower reaction times following S-D, and poor premorbid Ss a nonsignificant trend toward slower reaction times following S-S. Size estimations were not significantly affected by treatment conditions. Both S groups had differential size estimations as a function of the order of conditions and the thematic content of the stimuli. Both S groups showed a dominant practice effect for the Stroop test, and the practice effect was enhanced by S-D and C for good premorbid Ss. Poor premorbid Ss tended to prefer the S-D and dislike the S-S condition, while good premorbid Ss tended to dislike the S-D condition.

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