2 0 0 0 OA 新学術領域研究「時間生成学―時を生み出すこころの仕組み」
1 0 0 0 OA 反応時間および同時性知覚の神経基盤
- 著者
- 天野 薫 西田 眞也
- 出版者
- 日本基礎心理学会
- 雑誌
- 基礎心理学研究 (ISSN:02877651)
- 巻号頁・発行日
- vol.38, no.2, pp.232-236, 2020-03-31 (Released:2020-06-09)
- 参考文献数
- 8
While simple reaction time (RT) is known to be substantially affected by diverse stimulus parameters, subjective temporal judgments about the onset timing of stimulus are relatively accurate. Here we tried to find the neural correlates of RT and subjective temporal judgment by comparing MEG signals evoked by random-dot coherent-motion onset with these behavioral measures. For the same motion stimuli, participants performed both a simple RT task, and a simultaneity judgment task with respect to a beep. The effect of motion coherence was much smaller for the point of subjective simultaneity (PSS) than RT. Changes in RT and PSS could both be predicted by the time when temporally-integrated motion responses crossed a threshold. The threshold was lower for PSS than for RT, suggesting that the brain assigns the time marker for timing perception prior to stimulus detection. Existence of temporally integrated neural signals in the brain will be discussed in light of recent literature.