Haptic discrimination of size and texture in squirrel monkeys (Saimiri sciureus).
Identifieur interne : 001B04 ( PubMed/Checkpoint ); précédent : 001B03; suivant : 001B05Haptic discrimination of size and texture in squirrel monkeys (Saimiri sciureus).
Auteurs : P. Hille [Allemagne] ; C. Becker-Carus ; G. Dücker ; G. DehnhardtSource :
- Somatosensory & motor research [ 0899-0220 ] ; 2001.
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Abstract
The present study analyzed haptic abilities of four squirrel monkeys. Using a two-alternative forced-choice procedure, stimuli were presented in a visually opaque box, allowing unrestrained test subjects to grab through a small opening and touch the discriminanda. Difference thresholds were determined by a modified method of limits. In the first experiment we determined size difference thresholds for the discrimination of circular cylinders using standard stimuli differing in diameter from 10 mm to 35 mm. In the second experiment a texture difference threshold was obtained for the discrimination of grooved surfaces (groove width 2-7 mm). The squirrel monkeys achieved a mean size difference threshold of 8% stimulus difference. The linear increase of absolute thresholds as a function of the starting stimulus size showed that haptic size discriminations in squirrel monkeys correspond to Weber's law. Three of the animals achieved a texture difference of 10% stimulus difference, while one monkey showed a distinctively lower haptic acuity. An analysis of the exploratory behavior points to a subject-related difference in the significance of cutaneous and kinesthetic information during size discriminations. Whereas differences in the animals' exploratory behavior did not correlate with the size difference threshold a subject achieved, different thresholds for texture discrimination can be explained by the different exploratory procedures the monkeys used to touch grooved surfaces. The low difference thresholds determined for the squirrel monkeys in the present study point to the significance of unrestrained test conditions for the assessment of the haptic capacity of a species.
PubMed: 11327571
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Dücker</name></author><author><name sortKey="Dehnhardt, G" sort="Dehnhardt, G" uniqKey="Dehnhardt G" first="G" last="Dehnhardt">G. Dehnhardt</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2001">2001</date><idno type="RBID">pubmed:11327571</idno><idno type="pmid">11327571</idno><idno type="wicri:Area/PubMed/Corpus">001D55</idno><idno type="wicri:Area/PubMed/Curation">001D55</idno><idno type="wicri:Area/PubMed/Checkpoint">001B04</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Haptic discrimination of size and texture in squirrel monkeys (Saimiri sciureus).</title><author><name sortKey="Hille, P" sort="Hille, P" uniqKey="Hille P" first="P" last="Hille">P. Hille</name><affiliation wicri:level="1"><nlm:affiliation>University of Münster, Department of Psychology, Germany. Hillep@psy.uni-muenster.de</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>University of Münster, Department of Psychology</wicri:regionArea><wicri:noRegion>Department of Psychology</wicri:noRegion><wicri:noRegion>Department of Psychology</wicri:noRegion><wicri:noRegion>Department of Psychology</wicri:noRegion></affiliation></author><author><name sortKey="Becker Carus, C" sort="Becker Carus, C" uniqKey="Becker Carus C" first="C" last="Becker-Carus">C. Becker-Carus</name></author><author><name sortKey="Ducker, G" sort="Ducker, G" uniqKey="Ducker G" first="G" last="Dücker">G. Dücker</name></author><author><name sortKey="Dehnhardt, G" sort="Dehnhardt, G" uniqKey="Dehnhardt G" first="G" last="Dehnhardt">G. Dehnhardt</name></author></analytic><series><title level="j">Somatosensory & motor research</title><idno type="ISSN">0899-0220</idno><imprint><date when="2001" type="published">2001</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Discrimination (Psychology) (physiology)</term><term>Exploratory Behavior (physiology)</term><term>Female</term><term>Functional Laterality (physiology)</term><term>Male</term><term>Reaction Time (physiology)</term><term>Saimiri</term><term>Sensory Thresholds (physiology)</term><term>Size Perception (physiology)</term><term>Touch (physiology)</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Discrimination (Psychology)</term><term>Exploratory Behavior</term><term>Functional Laterality</term><term>Reaction Time</term><term>Sensory Thresholds</term><term>Size Perception</term><term>Touch</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Female</term><term>Male</term><term>Saimiri</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The present study analyzed haptic abilities of four squirrel monkeys. Using a two-alternative forced-choice procedure, stimuli were presented in a visually opaque box, allowing unrestrained test subjects to grab through a small opening and touch the discriminanda. Difference thresholds were determined by a modified method of limits. In the first experiment we determined size difference thresholds for the discrimination of circular cylinders using standard stimuli differing in diameter from 10 mm to 35 mm. In the second experiment a texture difference threshold was obtained for the discrimination of grooved surfaces (groove width 2-7 mm). The squirrel monkeys achieved a mean size difference threshold of 8% stimulus difference. The linear increase of absolute thresholds as a function of the starting stimulus size showed that haptic size discriminations in squirrel monkeys correspond to Weber's law. Three of the animals achieved a texture difference of 10% stimulus difference, while one monkey showed a distinctively lower haptic acuity. An analysis of the exploratory behavior points to a subject-related difference in the significance of cutaneous and kinesthetic information during size discriminations. Whereas differences in the animals' exploratory behavior did not correlate with the size difference threshold a subject achieved, different thresholds for texture discrimination can be explained by the different exploratory procedures the monkeys used to touch grooved surfaces. The low difference thresholds determined for the squirrel monkeys in the present study point to the significance of unrestrained test conditions for the assessment of the haptic capacity of a species.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">11327571</PMID><DateCreated><Year>2001</Year><Month>04</Month><Day>30</Day></DateCreated><DateCompleted><Year>2001</Year><Month>09</Month><Day>20</Day></DateCompleted><DateRevised><Year>2006</Year><Month>11</Month><Day>15</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0899-0220</ISSN><JournalIssue CitedMedium="Print"><Volume>18</Volume><Issue>1</Issue><PubDate><Year>2001</Year></PubDate></JournalIssue><Title>Somatosensory & motor research</Title><ISOAbbreviation>Somatosens Mot Res</ISOAbbreviation></Journal><ArticleTitle>Haptic discrimination of size and texture in squirrel monkeys (Saimiri sciureus).</ArticleTitle><Pagination><MedlinePgn>50-61</MedlinePgn></Pagination><Abstract><AbstractText>The present study analyzed haptic abilities of four squirrel monkeys. Using a two-alternative forced-choice procedure, stimuli were presented in a visually opaque box, allowing unrestrained test subjects to grab through a small opening and touch the discriminanda. Difference thresholds were determined by a modified method of limits. In the first experiment we determined size difference thresholds for the discrimination of circular cylinders using standard stimuli differing in diameter from 10 mm to 35 mm. In the second experiment a texture difference threshold was obtained for the discrimination of grooved surfaces (groove width 2-7 mm). The squirrel monkeys achieved a mean size difference threshold of 8% stimulus difference. The linear increase of absolute thresholds as a function of the starting stimulus size showed that haptic size discriminations in squirrel monkeys correspond to Weber's law. Three of the animals achieved a texture difference of 10% stimulus difference, while one monkey showed a distinctively lower haptic acuity. An analysis of the exploratory behavior points to a subject-related difference in the significance of cutaneous and kinesthetic information during size discriminations. Whereas differences in the animals' exploratory behavior did not correlate with the size difference threshold a subject achieved, different thresholds for texture discrimination can be explained by the different exploratory procedures the monkeys used to touch grooved surfaces. The low difference thresholds determined for the squirrel monkeys in the present study point to the significance of unrestrained test conditions for the assessment of the haptic capacity of a species.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Hille</LastName><ForeName>P</ForeName><Initials>P</Initials><AffiliationInfo><Affiliation>University of Münster, Department of Psychology, Germany. Hillep@psy.uni-muenster.de</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Becker-Carus</LastName><ForeName>C</ForeName><Initials>C</Initials></Author><Author ValidYN="Y"><LastName>Dücker</LastName><ForeName>G</ForeName><Initials>G</Initials></Author><Author ValidYN="Y"><LastName>Dehnhardt</LastName><ForeName>G</ForeName><Initials>G</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Somatosens Mot Res</MedlineTA><NlmUniqueID>8904127</NlmUniqueID><ISSNLinking>0899-0220</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName MajorTopicYN="N" UI="D000818">Animals</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D004192">Discrimination (Psychology)</DescriptorName><QualifierName MajorTopicYN="N" UI="Q000502">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D005106">Exploratory Behavior</DescriptorName><QualifierName MajorTopicYN="N" UI="Q000502">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D005260">Female</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D007839">Functional Laterality</DescriptorName><QualifierName MajorTopicYN="N" UI="Q000502">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D008297">Male</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D011930">Reaction Time</DescriptorName><QualifierName MajorTopicYN="N" UI="Q000502">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D012453">Saimiri</DescriptorName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D012684">Sensory Thresholds</DescriptorName><QualifierName MajorTopicYN="N" UI="Q000502">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D012858">Size Perception</DescriptorName><QualifierName MajorTopicYN="Y" UI="Q000502">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName MajorTopicYN="N" UI="D014110">Touch</DescriptorName><QualifierName MajorTopicYN="Y" UI="Q000502">physiology</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2001</Year><Month>5</Month><Day>1</Day><Hour>10</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2001</Year><Month>9</Month><Day>21</Day><Hour>10</Hour><Minute>1</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2001</Year><Month>5</Month><Day>1</Day><Hour>10</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">11327571</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Allemagne</li></country></list><tree><noCountry><name sortKey="Becker Carus, C" sort="Becker Carus, C" uniqKey="Becker Carus C" first="C" last="Becker-Carus">C. Becker-Carus</name><name sortKey="Dehnhardt, G" sort="Dehnhardt, G" uniqKey="Dehnhardt G" first="G" last="Dehnhardt">G. Dehnhardt</name><name sortKey="Ducker, G" sort="Ducker, G" uniqKey="Ducker G" first="G" last="Dücker">G. Dücker</name></noCountry><country name="Allemagne"><noRegion><name sortKey="Hille, P" sort="Hille, P" uniqKey="Hille P" first="P" last="Hille">P. Hille</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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