HapticV1, PubMed, Corpus, bibRecord, 001C02

A haptic size-contrast illusion affects size perception but not grasping.

Identifieur interne : 001C02 ( PubMed/Corpus ); précédent : 001C01; suivant : 001C03

A haptic size-contrast illusion affects size perception but not grasping.

Auteurs : David A. Westwood ; Melvyn A. Goodale

Source :

Experimental brain research [ 0014-4819 ] ; 2003.

RBID : pubmed:12898086

English descriptors

KwdEn :
- Adult, Female, Hand (physiology), Hand Strength (physiology), Humans, Illusions (physiology), Male, Psychomotor Performance (physiology), Psychophysics, Space Perception (physiology).
MESH :
- physiology : Hand, Hand Strength, Illusions, Psychomotor Performance, Space Perception.
- Adult, Female, Humans, Male, Psychophysics.

Abstract

Object features (e.g. size, shape and orientation) are relevant for recognition and identification, but also for the control of manual actions. Converging evidence suggests a dissociation between the visual systems that mediate object perception and object-directed action. Here we present evidence suggesting that a similar dissociation might exist in the haptic domain. We demonstrate that a haptic variation of a size-contrast illusion influences the perceived size of a target object, but not the degree to which the hand is opened when that object is the target of a grasping movement. This finding is consistent with the view that object perception is "scene-based" and takes into consideration not only the size of the target object but also the sizes of other nearby objects. In contrast, the control of object-directed action is primarily driven by the absolute size of the target object independent of the relative sizes of other objects in the environment, suggesting a "actor-based" frame of reference. The present findings suggest that dissociations between action and perception are not unique to the visual system, but might instead reflect a general organizational principle of sensory processing.

DOI: 10.1007/s00221-003-1599-x
PubMed: 12898086

Links to Exploration step

pubmed:12898086

Le document en format XML

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<front><div type="abstract" xml:lang="en">Object features (e.g. size, shape and orientation) are relevant for recognition and identification, but also for the control of manual actions. Converging evidence suggests a dissociation between the visual systems that mediate object perception and object-directed action. Here we present evidence suggesting that a similar dissociation might exist in the haptic domain. We demonstrate that a haptic variation of a size-contrast illusion influences the perceived size of a target object, but not the degree to which the hand is opened when that object is the target of a grasping movement. This finding is consistent with the view that object perception is "scene-based" and takes into consideration not only the size of the target object but also the sizes of other nearby objects. In contrast, the control of object-directed action is primarily driven by the absolute size of the target object independent of the relative sizes of other objects in the environment, suggesting a "actor-based" frame of reference. The present findings suggest that dissociations between action and perception are not unique to the visual system, but might instead reflect a general organizational principle of sensory processing.</div>
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A haptic size-contrast illusion affects size perception but not grasping.

A haptic size-contrast illusion affects size perception but not grasping.

Source :

English descriptors

Abstract

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki