Haptic aftereffect of curved surfaces.
Identifieur interne : 004605 ( Ncbi/Checkpoint ); précédent : 004604; suivant : 004606Haptic aftereffect of curved surfaces.
Auteurs : I M Vogels [Pays-Bas] ; A M Kappers ; J J KoenderinkSource :
- Perception [ 0301-0066 ] ; 1996.
English descriptors
- KwdEn :
- MESH :
Abstract
A haptic aftereffect of curved surfaces is demonstrated. Two spherical surfaces were presented sequentially to human subjects. They rested one hand on the first (conditioning) surface. After a fixed conditioning period they transferred their hand to the second (test) surface and judged whether the test surface was convex or concave. In experiment 1 the curvature of the conditioning surface was varied; the subject's judgment of convexity or concavity of the test surface was strongly shifted in the direction opposite to the curvature of the conditioning surface (negative aftereffect). Therefore, subjects judged a flat surface to be concave after being exposed to a convex surface. After a conditioning period of 5 s the shift was about 20% of the curvature of the conditioning surface. In experiment 2 the duration of the conditioning period was varied; the magnitude of the aftereffect could be described by a first-order integrator with a time constant of 2 s. In experiment 3 the time interval between the conditioning period and the touching of the second surface was varied; the magnitude of the aftereffect could be described by an exponential decay with a time constant of 40 s. It is concluded that the haptic aftereffect of curved surfaces is an important effect that occurs almost instantaneously and lasts for an appreciable period.
PubMed: 8861174
Affiliations:
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pubmed:8861174Le document en format XML
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<affiliation wicri:level="1"><nlm:affiliation>Helmholtz Instituut, Princetonplein 5, 3584 CC Utrecht, The Netherlands.</nlm:affiliation>
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<author><name sortKey="Kappers, A M" sort="Kappers, A M" uniqKey="Kappers A" first="A M" last="Kappers">A M Kappers</name>
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<author><name sortKey="Koenderink, J J" sort="Koenderink, J J" uniqKey="Koenderink J" first="J J" last="Koenderink">J J Koenderink</name>
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<series><title level="j">Perception</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term>
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<front><div type="abstract" xml:lang="en">A haptic aftereffect of curved surfaces is demonstrated. Two spherical surfaces were presented sequentially to human subjects. They rested one hand on the first (conditioning) surface. After a fixed conditioning period they transferred their hand to the second (test) surface and judged whether the test surface was convex or concave. In experiment 1 the curvature of the conditioning surface was varied; the subject's judgment of convexity or concavity of the test surface was strongly shifted in the direction opposite to the curvature of the conditioning surface (negative aftereffect). Therefore, subjects judged a flat surface to be concave after being exposed to a convex surface. After a conditioning period of 5 s the shift was about 20% of the curvature of the conditioning surface. In experiment 2 the duration of the conditioning period was varied; the magnitude of the aftereffect could be described by a first-order integrator with a time constant of 2 s. In experiment 3 the time interval between the conditioning period and the touching of the second surface was varied; the magnitude of the aftereffect could be described by an exponential decay with a time constant of 40 s. It is concluded that the haptic aftereffect of curved surfaces is an important effect that occurs almost instantaneously and lasts for an appreciable period.</div>
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<name sortKey="Koenderink, J J" sort="Koenderink, J J" uniqKey="Koenderink J" first="J J" last="Koenderink">J J Koenderink</name>
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<country name="Pays-Bas"><noRegion><name sortKey="Vogels, I M" sort="Vogels, I M" uniqKey="Vogels I" first="I M" last="Vogels">I M Vogels</name>
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