Imaizumi Shu, Asai Tomohisa
Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan; NTT Communication Science Laboratories, 3-1 Morinosato-wakamiya, Atsugi, Kanagawa 243-0198, Japan; Japan Society for the Promotion of Science, 5-3-1 Kojimachi, Chiyoda, Tokyo 102-0083, Japan.
NTT Communication Science Laboratories, 3-1 Morinosato-wakamiya, Atsugi, Kanagawa 243-0198, Japan.
Conscious Cogn. 2017 May;51:243-257. doi: 10.1016/j.concog.2017.04.006. Epub 2017 Apr 14.
Time perception distorts across different phases of bodily movement. During motor execution, sensory feedback matching an internal sensorimotor prediction is perceived to last longer. The sensorimotor prediction also underlies sense of agency. We investigated association between subjective time and agency during voluntary action. Participants performed hand action while watching a video feedback of their hand with various delays to manipulate agency. The perceived duration and agency over the video feedback were judged. Minimal delay of the video feedback resulted in longer perceived duration than the actual duration and stronger agency, while substantial feedback delay resulted in shorter perceived duration and weaker agency. These fluctuations of perceived duration and agency were nullified by the feedback of other's hand instead of their own, but not by inverted feedback from a third-person perspective. Subjective time during action might be associated with agency stemming from sensorimotor prediction, and self-other distinction based on bodily appearance.
时间感知在身体运动的不同阶段会发生扭曲。在运动执行过程中，与内部感觉运动预测相匹配的感觉反馈会被感知为持续更长时间。感觉运动预测也是能动感的基础。我们研究了自愿行动过程中主观时间与能动感之间的关联。参与者在观看手部视频反馈时进行手部动作，视频反馈有不同延迟以操控能动感。对视频反馈的感知持续时间和能动感进行了判断。视频反馈的最小延迟导致感知持续时间比实际持续时间更长且能动感更强，而大量反馈延迟则导致感知持续时间更短且能动感更弱。这些感知持续时间和能动感的波动被他人手部而非自己手部的反馈所消除，但从第三人称视角的反向反馈则无法消除。行动过程中的主观时间可能与源于感觉运动预测以及基于身体外观的自我 - 他人区分的能动感相关联。
