Hagiwara Takayoshi, Ganesh Gowrishankar, Sugimoto Maki, Inami Masahiko, Kitazaki Michiteru
Department of Computer Science and Engineering, Toyohashi University of Technology, Toyohashi, Aichi, Japan.
UM-CNRS Laboratoire d'Informatique de Robotique et de Microelectronique de Montpellier (LIRMM), 161, Rue Ada, Montpellier, France.
iScience. 2020 Nov 10;23(12):101732. doi: 10.1016/j.isci.2020.101732. eCollection 2020 Dec 18.
Cyber space enables us to "share" bodies whose movements are a consequence of movements by several individuals. But whether and how our motor behavior is affected during body sharing remains unclear. Here we examined this issue in arm reaching performed by a shared avatar, whose movement was generated by averaging the movements of two participants. We observed that participants exhibited improved reaction times with a shared avatar than alone. Moreover, the reach trajectory of the shared avatar was straighter than that of either participant and correlated with their subjective embodiment of the avatar. Finally, the jerk of the avatar's hand was less than either participant's own hand, both when they reached alone and in the shared body. Movement straightness and hand jerk are well known characteristics of human reach behavior, and our results suggest that during body sharing, humans prioritize these movement characteristics of the shared body over their own.
网络空间使我们能够“共享”身体，这些身体的动作是由多个人的动作共同产生的结果。但在身体共享过程中，我们的运动行为是否以及如何受到影响仍不清楚。在这里，我们通过一个共享化身进行手臂伸展来研究这个问题，该化身的动作是通过平均两名参与者的动作生成的。我们观察到，与单独操作相比，参与者在使用共享化身时反应时间有所改善。此外，共享化身的伸展轨迹比任何一名参与者的都更直，并且与他们对化身的主观身体体验相关。最后，无论是在单独伸手还是在共享身体中伸手时，化身手部的加加速度都小于任何一名参与者自己手部的加加速度。运动直线性和手部加加速度是人类伸手行为的众所周知的特征，我们的结果表明，在身体共享过程中，人类会优先考虑共享身体的这些运动特征而非自身的运动特征。
