Abstract
This paper verifies an improvement of accuracy of position recognition for extra robotic thumb by different position feedback. Embodiment has three subcomponents: Sense of Self-Location, Sense of Ownership, and Sense of Agency. Embodiment of the robotic thumb is enhanced by three issues: reaching task for fingertips, body ownership transfer illusion, and synchronous action. In this study we focused on the three kind of position feedback in reaching task. The reaching tasks for fingertips, face parts, and environment experiment are conducted to verify that decreasing the somatosensory feedback improve Sense of Self-Location. The results shows that the somatosensory feedback is important for embodiment of extra robotic prosthesis In addition, embodiment of extra robotic prosthesis cannot be improved without the somatosensory feedback.
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