Does Seeing Ice Really Feel Cold? Visual-Thermal Interaction under an Illusory Body-Ownership
Identifieur interne : 002233 ( Pmc/Corpus ); précédent : 002232; suivant : 002234Does Seeing Ice Really Feel Cold? Visual-Thermal Interaction under an Illusory Body-Ownership
Auteurs : Shoko Kanaya ; Yuka Matsushima ; Kazuhiko YokosawaSource :
- PLoS ONE [ 1932-6203 ] ; 2012.
Abstract
Although visual information seems to affect thermal perception (e.g. red color is associated with heat), previous studies have failed to demonstrate the interaction between visual and thermal senses. However, it has been reported that humans feel an illusory thermal sensation in conjunction with an apparently-thermal visual stimulus placed on a prosthetic hand in the rubber hand illusion (RHI) wherein an individual feels that a prosthetic (rubber) hand belongs to him/her. This study tests the possibility that the ownership of the body surface on which a visual stimulus is placed enhances the likelihood of a visual-thermal interaction. We orthogonally manipulated three variables: induced hand-ownership, visually-presented thermal information, and tactically-presented physical thermal information. Results indicated that the sight of an apparently-thermal object on a rubber hand that is illusorily perceived as one's own hand affects thermal judgments about the object physically touching this hand. This effect was not observed without the RHI. The importance of ownership of a body part that is touched by the visual object on the visual-thermal interaction is discussed.
Url:
DOI: 10.1371/journal.pone.0047293
PubMed: 23144814
PubMed Central: 3492393
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