Rubber hands 'feel' touch that eyes see

Rubber hands 'feel' touch that eyes see

19 FEBRUARY 1998 | Matthew Botvinick, Jonathan Cohen
The study explores a visual-tactile illusion where subjects perceive touch on a rubber hand as if it were their own, despite the rubber hand being hidden from view. Ten subjects participated in an experiment where they were shown a life-sized rubber hand while their hidden hand was simultaneously brushed with a paintbrush. After ten minutes, subjects reported feeling the touch on the rubber hand, indicating a strong illusion. A second experiment tested the proprioceptive distortion caused by the illusion, showing that subjects' reaches after the illusion were displaced toward the rubber hand, with the displacement magnitude varying with the duration of the illusion. The control group, who experienced a small asynchrony between the brushes, showed a much lower prevalence of the illusion and no significant displacement. The study suggests that intermodal matching can lead to self-attribution, supporting the idea that the body is distinguished from other objects through specific forms of intermodal perceptual correlation.The study explores a visual-tactile illusion where subjects perceive touch on a rubber hand as if it were their own, despite the rubber hand being hidden from view. Ten subjects participated in an experiment where they were shown a life-sized rubber hand while their hidden hand was simultaneously brushed with a paintbrush. After ten minutes, subjects reported feeling the touch on the rubber hand, indicating a strong illusion. A second experiment tested the proprioceptive distortion caused by the illusion, showing that subjects' reaches after the illusion were displaced toward the rubber hand, with the displacement magnitude varying with the duration of the illusion. The control group, who experienced a small asynchrony between the brushes, showed a much lower prevalence of the illusion and no significant displacement. The study suggests that intermodal matching can lead to self-attribution, supporting the idea that the body is distinguished from other objects through specific forms of intermodal perceptual correlation.
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