既知性及び表情が顔の認識過程に与える影響について : 反応時間と自発性瞬目を指標として
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概要
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The purpose of the present study was to examine effects of familiarity and expressions of face upon face recognition processes by using reaction time and eyeblink activity as measures. Twenty subjects were presented a set of face stimuli which was manipulated in two dimensions; face familiarity (Familiar vs. Unfamiliar) and facial expression(Happy vs. Neutral). A half of the subjects were asked to perform a familiarity judging task in which they answered whether a stimulus was familiar or unfamiliar. The remaining half of them conducted a facial expression judging task in which they evaluated whether a stimulus expressed a happy emotion or did not. The results of the familiarity judging task showed that the reaction times were faster to unfamiliar faces than to familiar faces and the effect of facial expressions were not be found. In the facial expression judging task, it was found that the reaction times were faster to happy faces than to neutral faces and the effect of face familiarity was not found. These results suggested that face recognition was mediated by processes which were independent of representations of facial expressions. In the familiarity judging task, a post-stimulus peak of eyeblink rate was observed in 1500-l800ms period after stimulusonset only to Familiar-Nertral face stimuli. The post-stimulus peak was the highest to Unfamiliar-Neutral face stimuli and the lowest to Familiar-Happy face stimuli in the facial expression judging task. It was suggested that the eyeblink measure might reflect inner cognitive processes which cannot be evaluated by the reaction time measure.
- 東海学院大学・東海女子短期大学の論文
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