The second me: Seeing the real body during humanoid robot embodiment produces an illusion of bi-location.
Whole-body embodiment studies have shown that synchronized multi-sensory cues can trick a healthy human mind to perceive self-location outside the bodily borders, producing an illusion that resembles an out-of-body experience (OBE). But can a healthy mind also perceive the sense of self in more than one body at the same time? To answer this question, we created a novel artificial reduplication of one's body using a humanoid robot embodiment system. We first enabled individuals to embody the humanoid robot by providing them with audio-visual feedback and control of the robot head movements and walk, and then explored the self-location and self-identification perceived by them when they observed themselves through the embodied robot. Our results reveal that, when individuals are exposed to the humanoid body reduplication, they experience an illusion that strongly resembles heautoscopy, suggesting that a healthy human mind is able to bi-locate in two different bodies simultaneously.
CNRS-AIST Joint Robotics Laboratory (JRL), UMI3218/RL, Tsukuba, Japan. Electronic address: laura.aymerich@gmail.com.
Laura
L
Aymerich-Franch
CNRS-UM LIRMM, Interactive Digital Human Group, UMR5506, Montpellier, France; CNRS-AIST Joint Robotics Laboratory (JRL), UMI3218/RL, Tsukuba, Japan.
Damien
D
Petit
CNRS-AIST Joint Robotics Laboratory (JRL), UMI3218/RL, Tsukuba, Japan; CNRS-UM LIRMM, Interactive Digital Human Group, UMR5506, Montpellier, France.
Gowrishankar
G
Ganesh
CNRS-AIST Joint Robotics Laboratory (JRL), UMI3218/RL, Tsukuba, Japan; CNRS-UM LIRMM, Interactive Digital Human Group, UMR5506, Montpellier, France.
Abderrahmane
A
Kheddar
D000328:Adult; D004532:Ego; D005260:Female; D006801:Humans; D007088:Illusions / Q000502:physiology*; D008297:Male; D012371:Robotics; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
Autoscopic phenomena; Full-body illusion; Heautoscopy; Humanoid robot embodiment; Mental bilocation; Out-of-body experience; Sense of self