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Article: Adaptation to conflicting visual and physical heading directions during walking

TitleAdaptation to conflicting visual and physical heading directions during walking
Authors
KeywordsAdaptation
Heading
Optic flow
Walking
Issue Date2011
PublisherAssociation for Research in Vision and Ophthalmology. The Journal's web site is located at http://wwwjournalofvisionorg/
Citation
Journal Of Vision, 2011, v. 11 n. 3, p. 1-10 How to Cite?
AbstractWe investigated the role of global optic flow for visual-motor adaptation of walking direction. In an immersive virtual environment, observers walked to a circular target lying on either a homogeneous ground plane (target-motion condition) or a textured ground plane (ground-flow condition). During adaptation trials, we changed the mapping from physical to visual space to create a conflict between physical and visual heading directions. On these trials, the visual heading specified by optic flow deviated from an observer's physical heading by ±10°. This conflict was not noticed by observers but caused them to walk along curved paths to the target. Over the course of 20 adaptation trials, observers adapted to partially compensate for the conflicts, resulting in straighter paths. When the conflicts were removed post-adaptation, observers showed aftereffects in the opposite direction. The amount of adaptation was similar for target-motion and ground-flow conditions (20-25%), with the ground-flow environment producing slightly faster adaptation and larger aftereffects. We conclude that the visual-motor system can rapidly recalibrate the mapping from physical to visual heading and that this adaptation does not strongly depend on full-field optic flow. © ARVO.
Persistent Identifierhttp://hdl.handle.net/10722/133741
ISSN
2015 Impact Factor: 2.341
2015 SCImago Journal Rankings: 1.042
ISI Accession Number ID
Funding AgencyGrant Number
Lang Sabbatical Award
Swarthmore Faculty Research Grant
Hong Kong Research Grants CouncilGRF HKU-750209H
Funding Information:

This research was supported by a Lang Sabbatical Award and a Swarthmore Faculty Research Grant to Frank H. Durgin, and by a grant to Jeffrey A. Saunders from the Hong Kong Research Grants Council (GRF HKU-750209H).

References

 

DC FieldValueLanguage
dc.contributor.authorSaunders, JAen_HK
dc.contributor.authorDurgin, FHen_HK
dc.date.accessioned2011-05-24T02:17:31Z-
dc.date.available2011-05-24T02:17:31Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal Of Vision, 2011, v. 11 n. 3, p. 1-10en_HK
dc.identifier.issn1534-7362en_HK
dc.identifier.urihttp://hdl.handle.net/10722/133741-
dc.description.abstractWe investigated the role of global optic flow for visual-motor adaptation of walking direction. In an immersive virtual environment, observers walked to a circular target lying on either a homogeneous ground plane (target-motion condition) or a textured ground plane (ground-flow condition). During adaptation trials, we changed the mapping from physical to visual space to create a conflict between physical and visual heading directions. On these trials, the visual heading specified by optic flow deviated from an observer's physical heading by ±10°. This conflict was not noticed by observers but caused them to walk along curved paths to the target. Over the course of 20 adaptation trials, observers adapted to partially compensate for the conflicts, resulting in straighter paths. When the conflicts were removed post-adaptation, observers showed aftereffects in the opposite direction. The amount of adaptation was similar for target-motion and ground-flow conditions (20-25%), with the ground-flow environment producing slightly faster adaptation and larger aftereffects. We conclude that the visual-motor system can rapidly recalibrate the mapping from physical to visual heading and that this adaptation does not strongly depend on full-field optic flow. © ARVO.en_HK
dc.languageengen_US
dc.publisherAssociation for Research in Vision and Ophthalmology. The Journal's web site is located at http://wwwjournalofvisionorg/en_HK
dc.relation.ispartofJournal of Visionen_HK
dc.subjectAdaptationen_HK
dc.subjectHeadingen_HK
dc.subjectOptic flowen_HK
dc.subjectWalkingen_HK
dc.titleAdaptation to conflicting visual and physical heading directions during walkingen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1534-7362&volume=11&issue=3, article no. 15&spage=&epage=&date=2011&atitle=Adaptation+to+conflicting+visual+and+physical+heading+directions+during+walking-
dc.identifier.emailSaunders, JA:jsaun@hkucc.hku.hken_HK
dc.identifier.authoritySaunders, JA=rp00638en_HK
dc.description.naturelink_to_OA_fulltexten_US
dc.identifier.doi10.1167/11.3.1en_HK
dc.identifier.pmid21427210-
dc.identifier.scopuseid_2-s2.0-79960113255en_HK
dc.identifier.hkuros185167en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79960113255&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume11en_HK
dc.identifier.issue3en_HK
dc.identifier.spage1en_HK
dc.identifier.epage10en_HK
dc.identifier.eissn1534-7362-
dc.identifier.isiWOS:000289076200015-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridSaunders, JA=7402341514en_HK
dc.identifier.scopusauthoridDurgin, FH=7006906286en_HK

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