Abstract
Two experiments were carried out to determine the effects of an auditory stimulus which was considered to be activating upon rotary pursuit tracking performance. In Exp. I 70-db stimulation presented during a tracking period tended to prevent the occurrence of decrement for 20 of 27 Ss. In Exp. II both 70 db and 100 db presented during a rest period appeared to enhance the amount of subsequent reminiscence for 15 Ss of 21. The results were interpreted as supporting the hypothesis that changes of activation level may contribute to such performance changes as decrement and reminiscence.
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