Context effects in haptic perception of roughness.
Identifieur interne : 001022 ( Ncbi/Checkpoint ); précédent : 001021; suivant : 001023Context effects in haptic perception of roughness.
Auteurs : Mirela Kahrimanovic [Pays-Bas] ; Wouter M. Bergmann Tiest ; Astrid M L. KappersSource :
- Experimental brain research [ 1432-1106 ] ; 2009.
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Abstract
The influence of temporal and spatial context during haptic roughness perception was investigated in two experiments. Subjects examined embossed dot patterns of varying average dot distance. A two-alternative forced-choice procedure was used to measure discrimination thresholds and biases. In Experiment 1, subjects had to discriminate between two stimuli that were presented simultaneously to adjacent fingers, after adaptation of one of these fingers. The results showed that adaptation to a rough surface decreased the perceived roughness of a surface subsequently scanned with the adapted finger, whereas adaptation to a smooth surface increased the perceived roughness (i.e. contrast after effect). In Experiment 2, subjects discriminated between subsequent test stimuli, while the adjacent finger was stimulated simultaneously. The results showed that perceived roughness of the test stimulus shifted towards the roughness of the adjacent stimulus (i.e. assimilation effect). These contextual effects are explained by structures of cortical receptive fields. Analogies with comparable effects in the visual system are discussed.
DOI: 10.1007/s00221-008-1697-x
PubMed: 19156403
Affiliations:
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Bergmann Tiest</name></author><author><name sortKey="Kappers, Astrid M L" sort="Kappers, Astrid M L" uniqKey="Kappers A" first="Astrid M L" last="Kappers">Astrid M L. Kappers</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2009">2009</date><idno type="doi">10.1007/s00221-008-1697-x</idno><idno type="RBID">pubmed:19156403</idno><idno type="pmid">19156403</idno><idno type="wicri:Area/PubMed/Corpus">001345</idno><idno type="wicri:Area/PubMed/Curation">001345</idno><idno type="wicri:Area/PubMed/Checkpoint">001143</idno><idno type="wicri:Area/Ncbi/Merge">001022</idno><idno type="wicri:Area/Ncbi/Curation">001022</idno><idno type="wicri:Area/Ncbi/Checkpoint">001022</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Context effects in haptic perception of roughness.</title><author><name sortKey="Kahrimanovic, Mirela" sort="Kahrimanovic, Mirela" uniqKey="Kahrimanovic M" first="Mirela" last="Kahrimanovic">Mirela Kahrimanovic</name><affiliation wicri:level="3"><nlm:affiliation>Physics of Man, Universiteit Utrecht, Padualaan 8, 3584 CH, Utrecht, The Netherlands. m.kahrimanovic@uu.nl</nlm:affiliation><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>Physics of Man, Universiteit Utrecht, Padualaan 8, 3584 CH, Utrecht</wicri:regionArea><placeName><settlement type="city">Utrecht</settlement><region nuts="2" type="province">Utrecht (province)</region></placeName></affiliation></author><author><name sortKey="Bergmann Tiest, Wouter M" sort="Bergmann Tiest, Wouter M" uniqKey="Bergmann Tiest W" first="Wouter M" last="Bergmann Tiest">Wouter M. Bergmann Tiest</name></author><author><name sortKey="Kappers, Astrid M L" sort="Kappers, Astrid M L" uniqKey="Kappers A" first="Astrid M L" last="Kappers">Astrid M L. Kappers</name></author></analytic><series><title level="j">Experimental brain research</title><idno type="eISSN">1432-1106</idno><imprint><date when="2009" type="published">2009</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adaptation, Physiological</term><term>Analysis of Variance</term><term>Choice Behavior</term><term>Female</term><term>Fingers</term><term>Humans</term><term>Male</term><term>Physical Stimulation</term><term>Psychophysics</term><term>Sensory Thresholds</term><term>Touch Perception</term><term>Young Adult</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adaptation, Physiological</term><term>Analysis of Variance</term><term>Choice Behavior</term><term>Female</term><term>Fingers</term><term>Humans</term><term>Male</term><term>Physical Stimulation</term><term>Psychophysics</term><term>Sensory Thresholds</term><term>Touch Perception</term><term>Young Adult</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The influence of temporal and spatial context during haptic roughness perception was investigated in two experiments. Subjects examined embossed dot patterns of varying average dot distance. A two-alternative forced-choice procedure was used to measure discrimination thresholds and biases. In Experiment 1, subjects had to discriminate between two stimuli that were presented simultaneously to adjacent fingers, after adaptation of one of these fingers. The results showed that adaptation to a rough surface decreased the perceived roughness of a surface subsequently scanned with the adapted finger, whereas adaptation to a smooth surface increased the perceived roughness (i.e. contrast after effect). In Experiment 2, subjects discriminated between subsequent test stimuli, while the adjacent finger was stimulated simultaneously. The results showed that perceived roughness of the test stimulus shifted towards the roughness of the adjacent stimulus (i.e. assimilation effect). These contextual effects are explained by structures of cortical receptive fields. Analogies with comparable effects in the visual system are discussed.</div></front></TEI><affiliations><list><country><li>Pays-Bas</li></country><region><li>Utrecht (province)</li></region><settlement><li>Utrecht</li></settlement></list><tree><noCountry><name sortKey="Bergmann Tiest, Wouter M" sort="Bergmann Tiest, Wouter M" uniqKey="Bergmann Tiest W" first="Wouter M" last="Bergmann Tiest">Wouter M. Bergmann Tiest</name><name sortKey="Kappers, Astrid M L" sort="Kappers, Astrid M L" uniqKey="Kappers A" first="Astrid M L" last="Kappers">Astrid M L. Kappers</name></noCountry><country name="Pays-Bas"><region name="Utrecht (province)"><name sortKey="Kahrimanovic, Mirela" sort="Kahrimanovic, Mirela" uniqKey="Kahrimanovic M" first="Mirela" last="Kahrimanovic">Mirela Kahrimanovic</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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