Drift and ownership toward a distant virtual body.

In body ownership illusions participants feel that a mannequin or virtual body (VB) is their own. Earlier results suggest that body ownership over a body seen from behind in extra personal space is possible when the surrogate body is visually stroked and tapped on its back, while spatially and tempo...

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Detalles Bibliográficos
Autores: Pomés Freixa, Ausiàs, Slater, Mel
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2013
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/53493
Acceso en línea:https://hdl.handle.net/2445/53493
Access Level:acceso abierto
Palabra clave:Realitat virtual
Percepció visual
Simulació per ordinador
Virtual reality
Visual perception
Computer simulation
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spelling Drift and ownership toward a distant virtual body.Pomés Freixa, AusiàsSlater, MelRealitat virtualPercepció visualSimulació per ordinadorVirtual realityVisual perceptionComputer simulationIn body ownership illusions participants feel that a mannequin or virtual body (VB) is their own. Earlier results suggest that body ownership over a body seen from behind in extra personal space is possible when the surrogate body is visually stroked and tapped on its back, while spatially and temporal synchronous tactile stimulation is applied to the participant's back. This result has been disputed with the claim that the results can be explained by self-recognition rather than somatic body ownership. We carried out an experiment with 30 participants in a between-groups design. They all saw the back of a VB 1.2 m in front, that moved in real-time determined by upper body motion capture. All felt tactile stimulation on their back, and for 15 of them this was spatially and temporally synchronous with stimulation that they saw on the back of the VB, but asynchronous for the other 15. After 3 min a revolving fan above the VB descended and stopped at the position of the VB neck. A questionnaire assessed referral of touch to the VB, body ownership, the illusion of drifting forwards toward the VB, and the VB drifting backwards. Heart rate deceleration (HRD) and the amount of head movement during the threat period were used to assess the response to the threat from the fan. Results showed that although referral of touch was significantly greater in the synchronous condition than the asynchronous, there were no other differences between the conditions. However, a further multivariate analysis revealed that in the visuotactile synchronous condition HRD and head movement increased with the illusion of forward drift and decreased with backwards drift. Body ownership contributed positively to these drift sensations. Our conclusion is that the setup results in a contradiction-somatic feelings associated with a distant body-that the brain attempts to resolve by generating drift illusions that would make the two bodies coincide.Frontiers Media2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/53493Articles publicats en revistes (Psicologia Clínica i Psicobiologia)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: http://dx.doi.org/10.3389/fnhum.2013.00908Frontiers in Human Neuroscience, 2013, vol. 7, num. 12http://dx.doi.org/10.3389/fnhum.2013.00908info:eu-repo/grantAgreement/EC/FP7/227985cc-by (c) Pomés, Ausiàs et al., 2013http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/534932026-05-27T06:46:51Z
dc.title.none.fl_str_mv Drift and ownership toward a distant virtual body.
title Drift and ownership toward a distant virtual body.
spellingShingle Drift and ownership toward a distant virtual body.
Pomés Freixa, Ausiàs
Realitat virtual
Percepció visual
Simulació per ordinador
Virtual reality
Visual perception
Computer simulation
title_short Drift and ownership toward a distant virtual body.
title_full Drift and ownership toward a distant virtual body.
title_fullStr Drift and ownership toward a distant virtual body.
title_full_unstemmed Drift and ownership toward a distant virtual body.
title_sort Drift and ownership toward a distant virtual body.
dc.creator.none.fl_str_mv Pomés Freixa, Ausiàs
Slater, Mel
author Pomés Freixa, Ausiàs
author_facet Pomés Freixa, Ausiàs
Slater, Mel
author_role author
author2 Slater, Mel
author2_role author
dc.subject.none.fl_str_mv Realitat virtual
Percepció visual
Simulació per ordinador
Virtual reality
Visual perception
Computer simulation
topic Realitat virtual
Percepció visual
Simulació per ordinador
Virtual reality
Visual perception
Computer simulation
description In body ownership illusions participants feel that a mannequin or virtual body (VB) is their own. Earlier results suggest that body ownership over a body seen from behind in extra personal space is possible when the surrogate body is visually stroked and tapped on its back, while spatially and temporal synchronous tactile stimulation is applied to the participant's back. This result has been disputed with the claim that the results can be explained by self-recognition rather than somatic body ownership. We carried out an experiment with 30 participants in a between-groups design. They all saw the back of a VB 1.2 m in front, that moved in real-time determined by upper body motion capture. All felt tactile stimulation on their back, and for 15 of them this was spatially and temporally synchronous with stimulation that they saw on the back of the VB, but asynchronous for the other 15. After 3 min a revolving fan above the VB descended and stopped at the position of the VB neck. A questionnaire assessed referral of touch to the VB, body ownership, the illusion of drifting forwards toward the VB, and the VB drifting backwards. Heart rate deceleration (HRD) and the amount of head movement during the threat period were used to assess the response to the threat from the fan. Results showed that although referral of touch was significantly greater in the synchronous condition than the asynchronous, there were no other differences between the conditions. However, a further multivariate analysis revealed that in the visuotactile synchronous condition HRD and head movement increased with the illusion of forward drift and decreased with backwards drift. Body ownership contributed positively to these drift sensations. Our conclusion is that the setup results in a contradiction-somatic feelings associated with a distant body-that the brain attempts to resolve by generating drift illusions that would make the two bodies coincide.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/53493
url https://hdl.handle.net/2445/53493
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: http://dx.doi.org/10.3389/fnhum.2013.00908
Frontiers in Human Neuroscience, 2013, vol. 7, num. 12
http://dx.doi.org/10.3389/fnhum.2013.00908
info:eu-repo/grantAgreement/EC/FP7/227985
dc.rights.none.fl_str_mv cc-by (c) Pomés, Ausiàs et al., 2013
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Pomés, Ausiàs et al., 2013
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Frontiers Media
publisher.none.fl_str_mv Frontiers Media
dc.source.none.fl_str_mv Articles publicats en revistes (Psicologia Clínica i Psicobiologia)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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