HapticV1, PubMed, Curation, bibRecord, 001345

Context effects in haptic perception of roughness.

Identifieur interne : 001345 ( PubMed/Curation ); précédent : 001344; suivant : 001346

Context effects in haptic perception of roughness.

Auteurs : Mirela Kahrimanovic [Pays-Bas] ; Wouter M. Bergmann Tiest ; Astrid M L. Kappers

Source :

Experimental brain research [ 1432-1106 ] ; 2009.

RBID : pubmed:19156403

English descriptors

KwdEn :
- Adaptation, Physiological, Analysis of Variance, Choice Behavior, Female, Fingers, Humans, Male, Physical Stimulation, Psychophysics, Sensory Thresholds, Touch Perception, Young Adult.
MESH :
- Adaptation, Physiological, Analysis of Variance, Choice Behavior, Female, Fingers, Humans, Male, Physical Stimulation, Psychophysics, Sensory Thresholds, Touch Perception, Young Adult.

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

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Le document en format XML

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<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>
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Context effects in haptic perception of roughness.

Context effects in haptic perception of roughness.

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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Pour générer des pages wiki