記憶負荷が語彙判断課題時の事象関連電位に及ぼす影響

The effect of working memory load on event-related brain potentials during lexical decision task

中尾 美月

武澤 友広

中尾 敬

広島大学大学院教育学研究科紀要. 第三部, 教育人間科学関連領域

Bulletin of the Graduate School of Education, Hiroshima University. Part. Ⅲ, Education and Human Science

In this study, we investigated whether the working memory involved the post-lexical semantic integration process whereby semantic information was integrated into a higher level discourse representation. ERPs were recorded from twelve undergraduate and graduate students during the lexical decision task under low or high working memory load conditions. Perticipants decided whether target was a real word or not with keeping two or five digits in working memory. The N400 reflecting the ease of semantic integration were smaller for targets preceded by related primes than prededed by unrelated primes. This N400 modutation, however, was not affected by memory load. It is suggested that the different working memory subsystem for retaining digits is engaged in the semantic integration underlying the N400.

記憶負荷

語彙判断課題

事象関連電位

N400

意味統合

ワーキングメモリ

memory load

lexical decision task

event-related brain potentials

N400

semantic integration

working memory

心理学 [ 140 ]

日本語

広島大学大学院教育学研究科

国立情報学研究所

[ISSN] 1346-5562

[NCID] AA11625039