In another variant on the rubber hand illusion, Mel Slater of UPC Barcelona Tech, Spain, recently persuaded 21 people that a virtual arm was their own, She showed volunteers a computerised image of a right arm on a 3D display while their own right arm was stretched out in front of them but hidden from view. The volunteers felt as if the virtual arm was projecting out in front of them from their right shoulder. As in the rubber hand illusion, Slater touched and stroked the real arm with a wand that relayed images of a virtual wand performing the same touches and strokes on the virtual arm.
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