The Optimization of Sensory Prediction and Sense of Agency

[Speaker] Matsumoto, Tomoaki:1
[Co-author] Yanagihara, Dai:2, Tanno, Yoshihiko:2
1:The University of Tokyo, College of Arts and Sciences (Japan), 2:The University of Tokyo, Graduate School of Arts and Sciences (Japan)

Sense of Agency (SoA) is the feeling of causing one's own action. One of the most influential accounts of SoA is the comparator model, which emphasizes a comparison between actual sensory feedback and predicted sensory consequences. According to this theory, the flexibility of sensory predictions contributes to the high plasticity in SoA. We examined the influence of optimization of sensory predictions on SoA as well as motor performance. Seven participants performed pointing-movements with a wireless mouse. Visual feedback was in spatial correspondence with the actual movement or rotated by certain angles. After adapting to a certain degree distortion, the peak of SoA shifted toward the angle used in adaptation phase. Moreover, predictions and motor performance also changed. This indicates that internal prediction about sensory outcome was updated and that SoA as well as motor control depends on it. This result is consistent with the comparator model.
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