Forward displacement in grasping and visually judging pliers
Identifieur interne : 006943 ( Main/Merge ); précédent : 006942; suivant : 006944Forward displacement in grasping and visually judging pliers
Auteurs : Anne-Marie Brouwer [Allemagne] ; Ian M. Thornton [Allemagne] ; Volker H. Franz [Allemagne]Source :
- Visual cognition [ 1350-6285 ] ; 2005.
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- Pascal (Inist)
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- topic : Homme.
English descriptors
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Abstract
Observers often tend to misremember the visual stopping point of a movement in the direction of movement (representational momentum). We investigated whether this forward displacement also occurs in grasping. We asked participants to close virtual pliers after the pliers had been opening or closing. The participants' thumbs and index fingers were attached to robot arms which allowed us to provide haptic feedback about the location of the pliers' handles. In a visual task, participants judged the remembered final opening width of the pliers relative to a comparison stimulus. For grasping, we found forward displacement: participants opened their fingers wider if the pliers had been opening compared to when they had been closing. In contrast, we did not find clear forward displacement in the visual task. The effects in grasping and the visual task were not correlated between participants. These results seem to argue against the existence of one form of anticipation that serves both perception and grasping.
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Pascal:05-0307125Le document en format XML
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Thornton</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Max Planck Institute for Biological Cybernetics</s1><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>Max Planck Institute for Biological Cybernetics</wicri:noRegion><wicri:noRegion>Max Planck Institute for Biological Cybernetics</wicri:noRegion></affiliation></author><author><name sortKey="Franz, Volker H" sort="Franz, Volker H" uniqKey="Franz V" first="Volker H." last="Franz">Volker H. Franz</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Max Planck Institute for Biological Cybernetics</s1><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>Max Planck Institute for Biological Cybernetics</wicri:noRegion><wicri:noRegion>Max Planck Institute for Biological Cybernetics</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Justus-Liebig-Universitat Giessen</s1><s3>DEU</s3><sZ>3 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>Justus-Liebig-Universitat Giessen</wicri:noRegion><wicri:noRegion>Justus-Liebig-Universitat Giessen</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Visual cognition</title><title level="j" type="abbreviated">Vis. cogn.</title><idno type="ISSN">1350-6285</idno><imprint><date when="2005">2005</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Visual cognition</title><title level="j" type="abbreviated">Vis. cogn.</title><idno type="ISSN">1350-6285</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Body movement</term><term>Cognition</term><term>Gripping</term><term>Human</term><term>Motricity</term><term>Perception</term><term>Upper limb</term><term>Vision</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Préhension</term><term>Motricité</term><term>Mouvement corporel</term><term>Membre supérieur</term><term>Vision</term><term>Perception</term><term>Cognition</term><term>Homme</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Homme</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Observers often tend to misremember the visual stopping point of a movement in the direction of movement (representational momentum). We investigated whether this forward displacement also occurs in grasping. We asked participants to close virtual pliers after the pliers had been opening or closing. The participants' thumbs and index fingers were attached to robot arms which allowed us to provide haptic feedback about the location of the pliers' handles. In a visual task, participants judged the remembered final opening width of the pliers relative to a comparison stimulus. For grasping, we found forward displacement: participants opened their fingers wider if the pliers had been opening compared to when they had been closing. In contrast, we did not find clear forward displacement in the visual task. The effects in grasping and the visual task were not correlated between participants. These results seem to argue against the existence of one form of anticipation that serves both perception and grasping.</div></front></TEI><affiliations><list><country><li>Allemagne</li></country></list><tree><country name="Allemagne"><noRegion><name sortKey="Brouwer, Anne Marie" sort="Brouwer, Anne Marie" uniqKey="Brouwer A" first="Anne-Marie" last="Brouwer">Anne-Marie Brouwer</name></noRegion><name sortKey="Franz, Volker H" sort="Franz, Volker H" uniqKey="Franz V" first="Volker H." last="Franz">Volker H. Franz</name><name sortKey="Franz, Volker H" sort="Franz, Volker H" uniqKey="Franz V" first="Volker H." last="Franz">Volker H. Franz</name><name sortKey="Thornton, Ian M" sort="Thornton, Ian M" uniqKey="Thornton I" first="Ian M." last="Thornton">Ian M. Thornton</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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