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Effects of aspirin on hand steadiness were studied as a function of shock intensity and of the temporal relation of shock to behavior. Aspirin had no direct effect on hand steadiness, but increased the disruptive effects of pain and of shock anticipation. Aspirin lacked evident analgesic effects and apparently potentiated Ss responses to anxiety evoking stimuli.
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Dinnerstein et al. (1963) studied this question.
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