アフォーダンス課題を用いたVR空間での複数身体に対する所有感の同時性の検討

抄録

Visual-tactile synchronization or visual-motor synchronization makes a non-native body feel like one’s own body (illusory body ownership). Although previous studies have shown that body ownership can be induced in multiple bodies, it is unclear whether body ownership switches between bodies or is generated in multiple bodies simultaneously. We hypothesized that if body ownership is generated in multiple bodies simultaneously, the perception of affordance for aperture pass-ability will change corresponding to the number of bodies. This study investigated whether two avatars moving synchronously with the participant’s movements could induce body ownership in multiple avatars and whether this could change the affordance perception. The results showed that two avatars induced weaker body ownership than one avatar. However, the affordance perception did not change regardless of the number of bodies. One possibility is that the body ownership switched between the two avatars. Thus, even if the body ownership for one body switches between bodies, all the multiple bodies are may still be experienced as one’s own body.