Perceiving Affordances for Fitting through Apertures
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Auteurs : Shaziela Ishak ; Karen E. Adolph ; Grace C. LinSource :
- Journal of experimental psychology. Human perception and performance [ 0096-1523 ] ; 2008.
Abstract
Affordances—possibilities for action—are constrained by the match between actors and their environments. For motor decisions to be adaptive, affordances must be detected accurately. Three experiments examined the correspondence between motor decisions and affordances as participants reached through apertures of varying size. A psychophysical procedure was used to estimate an affordance threshold for each participant (smallest aperture they could fit their hand through on 50% of trials), and motor decisions were assessed relative to affordance thresholds. Experiment 1 showed that participants scale motor decisions to hand size, and motor decisions and affordance thresholds are reliable over two blocked protocols. Experiment 2 examined the effects of habitual practice: Motor decisions were equally accurate when reaching with the more practiced dominant hand and less practiced non-dominant hand. Experiment 3 showed that participants recalibrate motor decisions to take changing body dimensions into account: Motor decisions while wearing a hand-enlarging prosthesis were similar to motor decisions without the prosthesis when data were normalized to affordance thresholds. Across experiments, errors in decisions to reach through too-small apertures were likely due to low penalty for error.
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DOI: 10.1037/a0011393
PubMed: 19045989
PubMed Central: 2660607
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Perceiving Affordances for Fitting through Apertures</title><author><name sortKey="Ishak, Shaziela" sort="Ishak, Shaziela" uniqKey="Ishak S" first="Shaziela" last="Ishak">Shaziela Ishak</name></author><author><name sortKey="Adolph, Karen E" sort="Adolph, Karen E" uniqKey="Adolph K" first="Karen E." last="Adolph">Karen E. Adolph</name></author><author><name sortKey="Lin, Grace C" sort="Lin, Grace C" uniqKey="Lin G" first="Grace C." last="Lin">Grace C. Lin</name></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">19045989</idno><idno type="pmc">2660607</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2660607</idno><idno type="RBID">PMC:2660607</idno><idno type="doi">10.1037/a0011393</idno><date when="2008">2008</date><idno type="wicri:Area/Pmc/Corpus">000F66</idno><idno type="wicri:Area/Pmc/Curation">000F66</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Perceiving Affordances for Fitting through Apertures</title><author><name sortKey="Ishak, Shaziela" sort="Ishak, Shaziela" uniqKey="Ishak S" first="Shaziela" last="Ishak">Shaziela Ishak</name></author><author><name sortKey="Adolph, Karen E" sort="Adolph, Karen E" uniqKey="Adolph K" first="Karen E." last="Adolph">Karen E. Adolph</name></author><author><name sortKey="Lin, Grace C" sort="Lin, Grace C" uniqKey="Lin G" first="Grace C." last="Lin">Grace C. Lin</name></author></analytic><series><title level="j">Journal of experimental psychology. Human perception and performance</title><idno type="ISSN">0096-1523</idno><imprint><date when="2008">2008</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p id="P1">Affordances—possibilities for action—are constrained by the match between actors and their environments. For motor decisions to be adaptive, affordances must be detected accurately. Three experiments examined the correspondence between motor decisions and affordances as participants reached through apertures of varying size. A psychophysical procedure was used to estimate an affordance threshold for each participant (smallest aperture they could fit their hand through on 50% of trials), and motor decisions were assessed relative to affordance thresholds. Experiment 1 showed that participants scale motor decisions to hand size, and motor decisions and affordance thresholds are reliable over two blocked protocols. Experiment 2 examined the effects of habitual practice: Motor decisions were equally accurate when reaching with the more practiced dominant hand and less practiced non-dominant hand. Experiment 3 showed that participants recalibrate motor decisions to take changing body dimensions into account: Motor decisions while wearing a hand-enlarging prosthesis were similar to motor decisions without the prosthesis when data were normalized to affordance thresholds. Across experiments, errors in decisions to reach through too-small apertures were likely due to low penalty for error.</p></div></front></TEI><pmc article-type="research-article" xml:lang="EN"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<pmc-dir>properties manuscript</pmc-dir>
<front><journal-meta><journal-id journal-id-type="nlm-journal-id">7502589</journal-id><journal-id journal-id-type="pubmed-jr-id">4732</journal-id><journal-id journal-id-type="nlm-ta">J Exp Psychol Hum Percept Perform</journal-id><journal-title>Journal of experimental psychology. Human perception and performance</journal-title><issn pub-type="ppub">0096-1523</issn></journal-meta><article-meta><article-id pub-id-type="pmid">19045989</article-id><article-id pub-id-type="pmc">2660607</article-id><article-id pub-id-type="doi">10.1037/a0011393</article-id><article-id pub-id-type="manuscript">NIHMS87940</article-id><article-categories><subj-group subj-group-type="heading"><subject>Article</subject></subj-group></article-categories><title-group><article-title>Perceiving Affordances for Fitting through Apertures</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Ishak</surname><given-names>Shaziela</given-names></name><xref ref-type="corresp" rid="cor1">*</xref></contrib><contrib contrib-type="author"><name><surname>Adolph</surname><given-names>Karen E.</given-names></name></contrib><contrib contrib-type="author"><name><surname>Lin</surname><given-names>Grace C.</given-names></name></contrib><aff id="A1">Department of Psychology, New York University, New York, NY 10003, USA.</aff></contrib-group><author-notes><corresp id="cor1"><label>*</label><email>shaziela@nyu.edu</email></corresp></author-notes><pub-date pub-type="nihms-submitted"><day>16</day><month>1</month><year>2009</year></pub-date><pub-date pub-type="ppub"><month>12</month><year>2008</year></pub-date><pub-date pub-type="pmc-release"><day>25</day><month>3</month><year>2009</year></pub-date><volume>34</volume><issue>6</issue><fpage>1501</fpage><lpage>1514</lpage><abstract><p id="P1">Affordances—possibilities for action—are constrained by the match between actors and their environments. For motor decisions to be adaptive, affordances must be detected accurately. Three experiments examined the correspondence between motor decisions and affordances as participants reached through apertures of varying size. A psychophysical procedure was used to estimate an affordance threshold for each participant (smallest aperture they could fit their hand through on 50% of trials), and motor decisions were assessed relative to affordance thresholds. Experiment 1 showed that participants scale motor decisions to hand size, and motor decisions and affordance thresholds are reliable over two blocked protocols. Experiment 2 examined the effects of habitual practice: Motor decisions were equally accurate when reaching with the more practiced dominant hand and less practiced non-dominant hand. Experiment 3 showed that participants recalibrate motor decisions to take changing body dimensions into account: Motor decisions while wearing a hand-enlarging prosthesis were similar to motor decisions without the prosthesis when data were normalized to affordance thresholds. Across experiments, errors in decisions to reach through too-small apertures were likely due to low penalty for error.</p></abstract><kwd-group><kwd>affordance</kwd><kwd>aperture</kwd><kwd>perception-action</kwd><kwd>psychophysics</kwd><kwd>reaching</kwd></kwd-group><contract-num rid="HD1">R37 HD033486-14</contract-num><contract-sponsor id="HD1">National Institute of Child Health & Human Development : NICHD</contract-sponsor></article-meta></front></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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