The haptic recognition of geometrical shapes in congenitally blind and blindfolded adolescents: is there a haptic prototype effect?
Identifieur interne : 000237 ( Hal/Checkpoint ); précédent : 000236; suivant : 000238The haptic recognition of geometrical shapes in congenitally blind and blindfolded adolescents: is there a haptic prototype effect?
Auteurs : Anne Theurel ; Stéphanie Frileux ; Yvette Hatwell [France] ; Edouard Gentaz [France]Source :
- PLoS ONE [ 1932-6203 ] ; 2012.
Abstract
BACKGROUND: It has been shown that visual geometrical shape categories (rectangle and triangle) are graded structures organized around a prototype as demonstrated by perception and production tasks in adults as well as in children. The visual prototypical shapes are better recognized than other exemplars of the categories. Their existence could emerge from early exposure to these prototypical shapes that are present in our visual environment. The present study examined the role of visual experience in the existence of prototypical shapes by comparing the haptic recognition of geometrical shapes in congenitally blind and blindfolded adolescents. METHODOLOGY/PRINCIPAL FINDINGS: To determine whether the existence of a prototype effect (higher recognition of prototypical shapes than non prototypical shapes) depended on visual experience, congenitally blind and blindfolded sighted adolescents were asked to recognize in the haptic modality three categories of correct shapes (square, rectangle, triangle) varying in orientation (prototypical/canonical orientation vs. non prototypical/canonical orientation rotated by 45°) among a set of other shapes. A haptic prototype effect was found in the blindfolded sighted whereas no difference between prototypical and non prototypical correct shapes was observed in the congenitally blind. A control experiment using a similar visual recognition task confirmed the existence of a visual prototype effect in a group of sighted adolescents. CONCLUSION/SIGNIFICANCE: These findings show that the prototype effect is not intrinsic to the haptic modality but depends on visual experience. This suggests that the occurrence of visual and haptic prototypical shapes in the recognition of geometrical shape seems to depend on visual exposure to these prototypical shapes existing in our environment.
Url:
DOI: 10.1371/journal.pone.0040251
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The visual prototypical shapes are better recognized than other exemplars of the categories. Their existence could emerge from early exposure to these prototypical shapes that are present in our visual environment. The present study examined the role of visual experience in the existence of prototypical shapes by comparing the haptic recognition of geometrical shapes in congenitally blind and blindfolded adolescents. METHODOLOGY/PRINCIPAL FINDINGS: To determine whether the existence of a prototype effect (higher recognition of prototypical shapes than non prototypical shapes) depended on visual experience, congenitally blind and blindfolded sighted adolescents were asked to recognize in the haptic modality three categories of correct shapes (square, rectangle, triangle) varying in orientation (prototypical/canonical orientation vs. non prototypical/canonical orientation rotated by 45°) among a set of other shapes. A haptic prototype effect was found in the blindfolded sighted whereas no difference between prototypical and non prototypical correct shapes was observed in the congenitally blind. A control experiment using a similar visual recognition task confirmed the existence of a visual prototype effect in a group of sighted adolescents. CONCLUSION/SIGNIFICANCE: These findings show that the prototype effect is not intrinsic to the haptic modality but depends on visual experience. This suggests that the occurrence of visual and haptic prototypical shapes in the recognition of geometrical shape seems to depend on visual exposure to these prototypical shapes existing in our environment.</div></front></TEI><hal api="V3"><titleStmt><title xml:lang="en">The haptic recognition of geometrical shapes in congenitally blind and blindfolded adolescents: is there a haptic prototype effect?</title><author role="aut"><persName><forename type="first">Anne</forename><surname>Theurel</surname></persName><email></email><idno type="halauthor">945417</idno></author><author role="aut"><persName><forename type="first">Stéphanie</forename><surname>Frileux</surname></persName><email></email><idno type="halauthor">1002988</idno></author><author role="aut"><persName><forename type="first">Yvette</forename><surname>Hatwell</surname></persName><email></email><idno type="halauthor">1002959</idno><affiliation ref="#struct-596"></affiliation></author><author role="aut"><persName><forename type="first">Edouard</forename><surname>Gentaz</surname></persName><email></email><idno type="halauthor">353871</idno><affiliation ref="#struct-596"></affiliation></author><editor role="depositor"><persName><forename>Christine</forename><surname>Cannard</surname></persName><email>hal-lpnc@upmf-grenoble.fr</email></editor></titleStmt><editionStmt><edition n="v1" type="current"><date type="whenSubmitted">2014-03-24 18:37:37</date><date type="whenModified">2014-03-24 18:37:37</date><date type="whenReleased">2014-03-24 18:37:37</date><date type="whenProduced">2012</date></edition><respStmt><resp>contributor</resp><name key="191802"><persName><forename>Christine</forename><surname>Cannard</surname></persName><email>hal-lpnc@upmf-grenoble.fr</email></name></respStmt></editionStmt><publicationStmt><distributor>CCSD</distributor><idno type="halId">hal-00965210</idno><idno type="halUri">https://hal.archives-ouvertes.fr/hal-00965210</idno><idno type="halBibtex">theurel:hal-00965210</idno><idno type="halRefHtml">PLoS ONE, Public Library of Science, 2012, 7 (6), pp.e40251. <10.1371/journal.pone.0040251></idno><idno type="halRef">PLoS ONE, Public Library of Science, 2012, 7 (6), pp.e40251. <10.1371/journal.pone.0040251></idno></publicationStmt><seriesStmt><idno type="stamp" n="UNIV-SAVOIE">Université Savoie Mont Blanc</idno><idno type="stamp" n="CNRS">CNRS - Centre national de la recherche scientifique</idno><idno type="stamp" n="UNIV-GRENOBLE1" p="UGA">Université Joseph Fourier - Grenoble I</idno><idno type="stamp" n="UGA">HAL Grenoble Alpes</idno><idno type="stamp" n="UNIV-PMF_GRENOBLE" p="UGA">Université Pierre-Mendès-France - Grenoble II</idno><idno type="stamp" n="LPNC" p="UGA">Laboatoire de Psychologie et Neurocognition</idno></seriesStmt><notesStmt><note type="audience" n="2">International</note><note type="popular" n="0">No</note><note type="peer" n="1">Yes</note></notesStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">The haptic recognition of geometrical shapes in congenitally blind and blindfolded adolescents: is there a haptic prototype effect?</title><author role="aut"><persName><forename type="first">Anne</forename><surname>Theurel</surname></persName><idno type="halAuthorId">945417</idno></author><author role="aut"><persName><forename type="first">Stéphanie</forename><surname>Frileux</surname></persName><idno type="halAuthorId">1002988</idno></author><author role="aut"><persName><forename type="first">Yvette</forename><surname>Hatwell</surname></persName><idno type="halAuthorId">1002959</idno><affiliation ref="#struct-596"></affiliation></author><author role="aut"><persName><forename type="first">Edouard</forename><surname>Gentaz</surname></persName><idno type="halAuthorId">353871</idno><affiliation ref="#struct-596"></affiliation></author></analytic><monogr><idno type="halJournalId" status="VALID">28700</idno><idno type="issn">1932-6203</idno><title level="j">PLoS ONE</title><imprint><publisher>Public Library of Science</publisher><biblScope unit="volume">7</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="pp">e40251</biblScope><date type="datePub">2012</date><date type="dateEpub">2012-06-28</date></imprint></monogr><idno type="doi">10.1371/journal.pone.0040251</idno><idno type="pubmed">22761961</idno></biblStruct></sourceDesc><profileDesc><langUsage><language ident="en">English</language></langUsage><textClass><classCode scheme="mesh">Adolescent</classCode><classCode scheme="mesh">Bandages</classCode><classCode scheme="mesh">Blindness</classCode><classCode scheme="mesh">Case-Control Studies</classCode><classCode scheme="mesh">Female</classCode><classCode scheme="mesh">Humans</classCode><classCode scheme="mesh">Male</classCode><classCode scheme="mesh">Visual Perception</classCode><classCode scheme="halDomain" n="sdv.neu">Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]</classCode><classCode scheme="halTypology" n="ART">Journal articles</classCode></textClass><abstract xml:lang="en">BACKGROUND: It has been shown that visual geometrical shape categories (rectangle and triangle) are graded structures organized around a prototype as demonstrated by perception and production tasks in adults as well as in children. The visual prototypical shapes are better recognized than other exemplars of the categories. Their existence could emerge from early exposure to these prototypical shapes that are present in our visual environment. The present study examined the role of visual experience in the existence of prototypical shapes by comparing the haptic recognition of geometrical shapes in congenitally blind and blindfolded adolescents. METHODOLOGY/PRINCIPAL FINDINGS: To determine whether the existence of a prototype effect (higher recognition of prototypical shapes than non prototypical shapes) depended on visual experience, congenitally blind and blindfolded sighted adolescents were asked to recognize in the haptic modality three categories of correct shapes (square, rectangle, triangle) varying in orientation (prototypical/canonical orientation vs. non prototypical/canonical orientation rotated by 45°) among a set of other shapes. A haptic prototype effect was found in the blindfolded sighted whereas no difference between prototypical and non prototypical correct shapes was observed in the congenitally blind. A control experiment using a similar visual recognition task confirmed the existence of a visual prototype effect in a group of sighted adolescents. CONCLUSION/SIGNIFICANCE: These findings show that the prototype effect is not intrinsic to the haptic modality but depends on visual experience. This suggests that the occurrence of visual and haptic prototypical shapes in the recognition of geometrical shape seems to depend on visual exposure to these prototypical shapes existing in our environment.</abstract></profileDesc></hal></record>Pour manipuler ce document sous Unix (Dilib)
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