不快刺激に対する反応に及ぼす予期強度の効果について
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概要
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The purpose of this study was to investigate the Epstein's hypothesis that an accurate event expectancy will facilitate habituation. In. Exp. I, 60 S were divided into 3 groups of equal size differing in expectancy for receiving an unpleasant stimulus. The probabilities of receiving the stimulus for each group were 5%, 50%, and 95%. 2 trials (anticipated impact and impact) were given to each S. In Exp. II, 40S were divided into 2 groups: In Group I (accurate event expectancy) each S was given information on each trial whether or not he would receive an unpleasant stimulus. In Group II (control) each S was given no such information. The findings of the 2 experiments (GSR, heart rate, and rating scales) indicated that an accurate event expectancy did not necessarily reduce initial reactivity, but it facilitated habituation. These results coincided with the results of the experiments by Epstein & Roupenian and Breitner.
- 公益社団法人 日本心理学会の論文