Cognitive Psychology D06
Prof. Kazumichi Matsumiya
KeywordsHuman behavior, Psychophysics, Bodily awareness, Decision-making
The question of how our body interacts with objects in the world is a fundamental problem in psychology and neuroscience. We have shown that the sense of owning one’s own body can affect visual perception, which suggests the importance of considering body-in-mind in perceptual processing. Based on this finding, we are now investigating human perceptual processes linked to body-in-mind. Our recent study has investigated whether the process underlying body awareness is shared between body localization and body ownership. To address this issue, we used a perceptual illusion in which ownership over a computer graphics hand is experienced (this illusion is referred to as the rubber hand illusion), and combined this illusion with a statistical model of optimal multisensory integration process. This study revealed that there are separate multisensory integration processes between body localization and body ownership in the human brain. This finding has implications for understanding the underlying mechanisms for body self-awareness. We promote the research and teaching of understanding human behavior, human body, and human perception by means of psychophysics.