Visual-haptic integration with pliers and tongs: signal "weights" take account of changes in haptic sensitivity caused by different tools.
Identifieur interne : 000733 ( PubMed/Corpus ); précédent : 000732; suivant : 000734Visual-haptic integration with pliers and tongs: signal "weights" take account of changes in haptic sensitivity caused by different tools.
Auteurs : Chie Takahashi ; Simon J. WattSource :
- Frontiers in psychology [ 1664-1078 ] ; 2014.
Abstract
When we hold an object while looking at it, estimates from visual and haptic cues to size are combined in a statistically optimal fashion, whereby the "weight" given to each signal reflects their relative reliabilities. This allows object properties to be estimated more precisely than would otherwise be possible. Tools such as pliers and tongs systematically perturb the mapping between object size and the hand opening. This could complicate visual-haptic integration because it may alter the reliability of the haptic signal, thereby disrupting the determination of appropriate signal weights. To investigate this we first measured the reliability of haptic size estimates made with virtual pliers-like tools (created using a stereoscopic display and force-feedback robots) with different "gains" between hand opening and object size. Haptic reliability in tool use was straightforwardly determined by a combination of sensitivity to changes in hand opening and the effects of tool geometry. The precise pattern of sensitivity to hand opening, which violated Weber's law, meant that haptic reliability changed with tool gain. We then examined whether the visuo-motor system accounts for these reliability changes. We measured the weight given to visual and haptic stimuli when both were available, again with different tool gains, by measuring the perceived size of stimuli in which visual and haptic sizes were varied independently. The weight given to each sensory cue changed with tool gain in a manner that closely resembled the predictions of optimal sensory integration. The results are consistent with the idea that different tool geometries are modeled by the brain, allowing it to calculate not only the distal properties of objects felt with tools, but also the certainty with which those properties are known. These findings highlight the flexibility of human sensory integration and tool-use, and potentially provide an approach for optimizing the design of visual-haptic devices.
DOI: 10.3389/fpsyg.2014.00109
PubMed: 24592245
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Watt</name><affiliation><nlm:affiliation>Wolfson Centre for Cognitive Neuroscience, School of Psychology, Bangor University Bangor, UK.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2014">2014</date><idno type="doi">10.3389/fpsyg.2014.00109</idno><idno type="RBID">pubmed:24592245</idno><idno type="pmid">24592245</idno><idno type="wicri:Area/PubMed/Corpus">000733</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Visual-haptic integration with pliers and tongs: signal "weights" take account of changes in haptic sensitivity caused by different tools.</title><author><name sortKey="Takahashi, Chie" sort="Takahashi, Chie" uniqKey="Takahashi C" first="Chie" last="Takahashi">Chie Takahashi</name><affiliation><nlm:affiliation>Wolfson Centre for Cognitive Neuroscience, School of Psychology, Bangor University Bangor, UK ; Behavioural Brain Science Centre, School of Psychology, University of Birmingham Birmingham, UK.</nlm:affiliation></affiliation></author><author><name sortKey="Watt, Simon J" sort="Watt, Simon J" uniqKey="Watt S" first="Simon J" last="Watt">Simon J. Watt</name><affiliation><nlm:affiliation>Wolfson Centre for Cognitive Neuroscience, School of Psychology, Bangor University Bangor, UK.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Frontiers in psychology</title><idno type="eISSN">1664-1078</idno><imprint><date when="2014" type="published">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">When we hold an object while looking at it, estimates from visual and haptic cues to size are combined in a statistically optimal fashion, whereby the "weight" given to each signal reflects their relative reliabilities. This allows object properties to be estimated more precisely than would otherwise be possible. Tools such as pliers and tongs systematically perturb the mapping between object size and the hand opening. This could complicate visual-haptic integration because it may alter the reliability of the haptic signal, thereby disrupting the determination of appropriate signal weights. To investigate this we first measured the reliability of haptic size estimates made with virtual pliers-like tools (created using a stereoscopic display and force-feedback robots) with different "gains" between hand opening and object size. Haptic reliability in tool use was straightforwardly determined by a combination of sensitivity to changes in hand opening and the effects of tool geometry. The precise pattern of sensitivity to hand opening, which violated Weber's law, meant that haptic reliability changed with tool gain. We then examined whether the visuo-motor system accounts for these reliability changes. We measured the weight given to visual and haptic stimuli when both were available, again with different tool gains, by measuring the perceived size of stimuli in which visual and haptic sizes were varied independently. The weight given to each sensory cue changed with tool gain in a manner that closely resembled the predictions of optimal sensory integration. The results are consistent with the idea that different tool geometries are modeled by the brain, allowing it to calculate not only the distal properties of objects felt with tools, but also the certainty with which those properties are known. These findings highlight the flexibility of human sensory integration and tool-use, and potentially provide an approach for optimizing the design of visual-haptic devices.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="PubMed-not-MEDLINE"><PMID Version="1">24592245</PMID><DateCreated><Year>2014</Year><Month>03</Month><Day>04</Day></DateCreated><DateCompleted><Year>2014</Year><Month>03</Month><Day>04</Day></DateCompleted><DateRevised><Year>2015</Year><Month>02</Month><Day>09</Day></DateRevised><Article PubModel="Electronic-eCollection"><Journal><ISSN IssnType="Electronic">1664-1078</ISSN><JournalIssue CitedMedium="Print"><Volume>5</Volume><PubDate><Year>2014</Year></PubDate></JournalIssue><Title>Frontiers in psychology</Title><ISOAbbreviation>Front Psychol</ISOAbbreviation></Journal><ArticleTitle>Visual-haptic integration with pliers and tongs: signal "weights" take account of changes in haptic sensitivity caused by different tools.</ArticleTitle><Pagination><MedlinePgn>109</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.3389/fpsyg.2014.00109</ELocationID><Abstract><AbstractText>When we hold an object while looking at it, estimates from visual and haptic cues to size are combined in a statistically optimal fashion, whereby the "weight" given to each signal reflects their relative reliabilities. This allows object properties to be estimated more precisely than would otherwise be possible. Tools such as pliers and tongs systematically perturb the mapping between object size and the hand opening. This could complicate visual-haptic integration because it may alter the reliability of the haptic signal, thereby disrupting the determination of appropriate signal weights. To investigate this we first measured the reliability of haptic size estimates made with virtual pliers-like tools (created using a stereoscopic display and force-feedback robots) with different "gains" between hand opening and object size. Haptic reliability in tool use was straightforwardly determined by a combination of sensitivity to changes in hand opening and the effects of tool geometry. The precise pattern of sensitivity to hand opening, which violated Weber's law, meant that haptic reliability changed with tool gain. We then examined whether the visuo-motor system accounts for these reliability changes. We measured the weight given to visual and haptic stimuli when both were available, again with different tool gains, by measuring the perceived size of stimuli in which visual and haptic sizes were varied independently. The weight given to each sensory cue changed with tool gain in a manner that closely resembled the predictions of optimal sensory integration. The results are consistent with the idea that different tool geometries are modeled by the brain, allowing it to calculate not only the distal properties of objects felt with tools, but also the certainty with which those properties are known. These findings highlight the flexibility of human sensory integration and tool-use, and potentially provide an approach for optimizing the design of visual-haptic devices.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Takahashi</LastName><ForeName>Chie</ForeName><Initials>C</Initials><AffiliationInfo><Affiliation>Wolfson Centre for Cognitive Neuroscience, School of Psychology, Bangor University Bangor, UK ; Behavioural Brain Science Centre, School of Psychology, University of Birmingham Birmingham, UK.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Watt</LastName><ForeName>Simon J</ForeName><Initials>SJ</Initials><AffiliationInfo><Affiliation>Wolfson Centre for Cognitive Neuroscience, School of Psychology, Bangor University Bangor, UK.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2014</Year><Month>02</Month><Day>14</Day></ArticleDate></Article><MedlineJournalInfo><Country>Switzerland</Country><MedlineTA>Front Psychol</MedlineTA><NlmUniqueID>101550902</NlmUniqueID><ISSNLinking>1664-1078</ISSNLinking></MedlineJournalInfo><OtherID Source="NLM">PMC3924038</OtherID><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">cue weights</Keyword><Keyword MajorTopicYN="N">haptic perception</Keyword><Keyword MajorTopicYN="N">multisensory integration</Keyword><Keyword MajorTopicYN="N">tool use</Keyword><Keyword MajorTopicYN="N">vision</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="ecollection"><Year>2014</Year><Month></Month><Day></Day></PubMedPubDate><PubMedPubDate PubStatus="received"><Year>2013</Year><Month>10</Month><Day>09</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2014</Year><Month>1</Month><Day>27</Day></PubMedPubDate><PubMedPubDate PubStatus="epublish"><Year>2014</Year><Month>2</Month><Day>14</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>3</Month><Day>5</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>3</Month><Day>5</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2014</Year><Month>3</Month><Day>5</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>epublish</PublicationStatus><ArticleIdList><ArticleId IdType="doi">10.3389/fpsyg.2014.00109</ArticleId><ArticleId IdType="pubmed">24592245</ArticleId><ArticleId IdType="pmc">PMC3924038</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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