000195778 001__ 195778
000195778 005__ 20190316235826.0
000195778 0247_ $$2doi$$a10.3389/fpsyg.2013.00946
000195778 022__ $$a1664-1078
000195778 02470 $$2ISI$$a000331574500001
000195778 037__ $$aARTICLE
000195778 245__ $$aVisual capture and the experience of having two bodies – Evidence from two different virtual reality techniques
000195778 269__ $$a2013
000195778 260__ $$bFrontiers Research Foundation$$c2013
000195778 336__ $$aJournal Articles
000195778 520__ $$aIn neurology and psychiatry the detailed study of illusory own body perceptions has suggested close links between bodily processing and self-consciousness. One such illusory own body perception is heautoscopy where patients have the sensation of being reduplicated and to exist at two or even more locations. In previous experiments, using a video head-mounted display, self-location and self-identification were manipulated by applying conflicting visuo-tactile information. Yet the experienced singularity of the self was not affected, i.e., participants did not experience having multiple bodies or selves. In two experiments presented in this paper, we investigated self-location and self-identification while participants saw two virtual bodies (video-generated in study 1 and 3D computer generated in study 2) that were stroked either synchronously or asynchronously with their own body. In both experiments, we report that self-identification with two virtual bodies was stronger during synchronous stroking. Furthermore, in the video generated setup with synchronous stroking participants reported a greater feeling of having multiple bodies than in the control conditions. In study 1, but not in study 2, we report that self-location - measured by anterior posterior drift - was significantly shifted towards the two bodies in the synchronous condition only. Self-identification with two bodies, the sensation of having multiple bodies, and the changes in self-location show that the experienced singularity of the self can be studied experimentally. We discuss our data with respect to ownership for supernumerary hands and heautoscopy. We finally compare the effects of the video and 3D computer generated head-mounted display technology and discuss the possible benefits of using either technology to induce changes in illusory self-identification with a virtual body.
000195778 6531_ $$aheautoscopy
000195778 6531_ $$afull body illusion
000195778 6531_ $$avirtual reality
000195778 6531_ $$aownership
000195778 6531_ $$aself consciousness
000195778 700__ $$0244856$$g185375$$aHeydrich, Lukas
000195778 700__ $$aDodds, Trevor J.
000195778 700__ $$aAspell, Jane E.
000195778 700__ $$0241247$$g146265$$aHerbelin, Bruno
000195778 700__ $$aBülthoff, Heinrich H.
000195778 700__ $$aMohler, Betty J.
000195778 700__ $$aBlanke, Olaf$$0240593$$g165806
000195778 773__ $$j4$$tFrontiers in Psychology
000195778 8564_ $$uhttps://infoscience.epfl.ch/record/195778/files/Heydrich%20et%20al._2013.pdf$$zn/a$$s1587396$$yn/a
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000195778 937__ $$aEPFL-ARTICLE-195778
000195778 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000195778 980__ $$aARTICLE