文字の心的回転にともなう事象関連脳電位の変化

Event-related brain potentials in a mental rotation task with different probabilities of normal and mirror-image letter stimuli

宮谷 真人

永野 真紀子

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 3, Education and human science

The aim of this experiment was to evaluate a scalp distribution of processing-related negativity that was thought as an electrophysiological correlate of the mental rotation process. Event-related brain potentials (ERPs) were recorded from 16 subjects who performed a mental rotation task (to decide whether the letter presented in one of nine different orientations was in normal or mirror-reversed format). The probability of normal stimuli was manipulated between conditions to reduce the effects of P3b that was simultaneously superimposed on the rotation-related negativity. The results showed that the increase of mental rotation demand caused negative shifts of the ERPs between 400 and 800 ms latency range. Although the probability of the normal stimuli did not change the amplitudes of P3b, some differences of topography were observed between the rotation-related negativity and the P3b.

心的回転

事象関連脳電位

処理関連陰性電位

P3b

Mental rotation

Event-related brain potentials

Processing-related negativity

P3b

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