本研究では，表情認知における暗闇の効果について実験的検討を行った．参加者は，照明下，もしくは暗闇下で，未知人物の怒り顔，笑顔，真顔の各表情写真を呈示され，表情の強度評定を行った.その結果，怒り顔については照明下よりも暗闇下において，より怒りが強いと判断された．一方，笑顔については暗闇の効果は見られなかった．脅威的な文脈としての暗闇は，怒り顔における脅威的な特徴の認知を促進することが示唆される.%We examined the effects of darkness on recognition of facial expression. Participants were shown a set of unfamiliar faces with angry, happy and neutral facial expressions in a dark room or a well-lighted room. We found that angry faces were perceived as having distinctive characteristics more in the dark room than in the lighted room. On the other hand, intensity of illumination had no impact on the recognition of happy faces. It would suggest that threatening context may enhance perceived threatening features of angry faces.
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