Curvature discrimination in various finger conditions.
Identifieur interne : 001761 ( PubMed/Curation ); précédent : 001760; suivant : 001762Curvature discrimination in various finger conditions.
Auteurs : Bernard J. Van Der Horst [Pays-Bas] ; Astrid M L. KappersSource :
- Experimental brain research [ 0014-4819 ] ; 2007.
English descriptors
- KwdEn :
- MESH :
- methods : Physical Stimulation.
- physiology : Discrimination (Psychology), Fingers, Touch.
- Adult, Female, Humans, Male, Psychomotor Performance, Stereognosis.
Abstract
The ability of humans to discriminate curvature was investigated for different finger conditions. The experiments were conducted in which subjects explored cylindrically curved stimuli by touch. Using a 2-alternative forced-choice procedure, discrimination thresholds and biases were measured for several conditions. In 1-finger conditions, reference and test stimulus were explored with the same finger, whereas in 2-finger conditions these stimuli were felt with different fingers. Similar thresholds were obtained for the 1-finger conditions, in which either the preferred or the non-preferred index finger or the thumb was employed. However, significantly higher thresholds were found for the conditions in which subjects used two fingers, either of the same hand or of different hands. Interestingly, even higher thresholds were obtained for a 2-finger condition in which subjects explored the stimuli simultaneously instead of sequentially. In addition, subject-dependent biases were found in the 2-finger conditions. We conclude that the number of fingers and the mode of exploration have a considerable effect on performance in a haptic task such as curvature discrimination.
DOI: 10.1007/s00221-006-0670-9
PubMed: 16947061
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Van Der Horst</name><affiliation wicri:level="1"><nlm:affiliation>Department of Physics of Man, Helmholtz Instituut, Universiteit Utrecht, Princetonplein 5, 3584 CC Utrecht, The Netherlands. b.j.vanderhorst@phys.uu.nl</nlm:affiliation><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>Department of Physics of Man, Helmholtz Instituut, Universiteit Utrecht, Princetonplein 5, 3584 CC Utrecht</wicri:regionArea></affiliation></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="ISSN">0014-4819</idno><imprint><date when="2007" type="published">2007</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term><term>Discrimination (Psychology) (physiology)</term><term>Female</term><term>Fingers (physiology)</term><term>Humans</term><term>Male</term><term>Physical Stimulation (methods)</term><term>Psychomotor Performance</term><term>Stereognosis</term><term>Touch (physiology)</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Physical Stimulation</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Discrimination (Psychology)</term><term>Fingers</term><term>Touch</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adult</term><term>Female</term><term>Humans</term><term>Male</term><term>Psychomotor Performance</term><term>Stereognosis</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The ability of humans to discriminate curvature was investigated for different finger conditions. The experiments were conducted in which subjects explored cylindrically curved stimuli by touch. Using a 2-alternative forced-choice procedure, discrimination thresholds and biases were measured for several conditions. In 1-finger conditions, reference and test stimulus were explored with the same finger, whereas in 2-finger conditions these stimuli were felt with different fingers. Similar thresholds were obtained for the 1-finger conditions, in which either the preferred or the non-preferred index finger or the thumb was employed. However, significantly higher thresholds were found for the conditions in which subjects used two fingers, either of the same hand or of different hands. Interestingly, even higher thresholds were obtained for a 2-finger condition in which subjects explored the stimuli simultaneously instead of sequentially. In addition, subject-dependent biases were found in the 2-finger conditions. We conclude that the number of fingers and the mode of exploration have a considerable effect on performance in a haptic task such as curvature discrimination.</div></front></TEI><pubmed><MedlineCitation Owner="NLM" Status="MEDLINE"><PMID Version="1">16947061</PMID><DateCreated><Year>2007</Year><Month>09</Month><Day>20</Day></DateCreated><DateCompleted><Year>2007</Year><Month>10</Month><Day>31</Day></DateCompleted><DateRevised><Year>2013</Year><Month>12</Month><Day>13</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0014-4819</ISSN><JournalIssue CitedMedium="Print"><Volume>177</Volume><Issue>3</Issue><PubDate><Year>2007</Year><Month>Mar</Month></PubDate></JournalIssue><Title>Experimental brain research</Title><ISOAbbreviation>Exp Brain Res</ISOAbbreviation></Journal><ArticleTitle>Curvature discrimination in various finger conditions.</ArticleTitle><Pagination><MedlinePgn>304-11</MedlinePgn></Pagination><Abstract><AbstractText>The ability of humans to discriminate curvature was investigated for different finger conditions. The experiments were conducted in which subjects explored cylindrically curved stimuli by touch. Using a 2-alternative forced-choice procedure, discrimination thresholds and biases were measured for several conditions. In 1-finger conditions, reference and test stimulus were explored with the same finger, whereas in 2-finger conditions these stimuli were felt with different fingers. Similar thresholds were obtained for the 1-finger conditions, in which either the preferred or the non-preferred index finger or the thumb was employed. However, significantly higher thresholds were found for the conditions in which subjects used two fingers, either of the same hand or of different hands. Interestingly, even higher thresholds were obtained for a 2-finger condition in which subjects explored the stimuli simultaneously instead of sequentially. In addition, subject-dependent biases were found in the 2-finger conditions. 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