HapticV1, PascalFrancis, Corpus, bibRecord, 001093

Bias and sensitivity in the haptic perception of geometry

Identifieur interne : 001093 ( PascalFrancis/Corpus ); précédent : 001092; suivant : 001094

Bias and sensitivity in the haptic perception of geometry

Auteurs : Denise Y. P. Henriques ; John F. Soechting

Source :

Experimental brain research [ 0014-4819 ] ; 2003.

RBID : Pascal:04-0153273

Descripteurs français

Pascal (Inist)
- Main, Tâche manuelle, Courbure, Mouvement orienté, Guide, Kinesthésie, Psychophysique, Sensibilité tactile, Vision, Coordination sensorimotrice, Contrôle moteur, Homme, Perception haptique.

English descriptors

KwdEn :
- Curvature, Goal directed movement, Guide, Hand, Haptic perception, Human, Kinesthesia, Manual task, Motor control, Psychophysics, Sensorimotor coordination, Tactile sensitivity, Vision.

Abstract

Our ability to recognize and manipulate objects relies on our haptic sense of the objects' geometry. But little is known about the acuity of haptic perception compared to other senses like sight and hearing. Here, we determined how accurately humans could sense various geometric features of objects across the workspace. Subjects gripped the handle of a robot arm which was programmed to keep the hand inside a planar region with straight or curved boundaries. With eyes closed, subjects moved the manipulandum along this virtual wall and judged its curvature or direction. We mapped their sensitivity in different parts of the workspace. We also tested subjects' ability to discriminate between boundaries with different degrees of curvature, to sense the rate of change of curvature, and to detect the elongation or flattening of ellipses. We found that subjects' estimates of the curvature of their hand path were close to veridical, and did not change across the workspace though they did vary somewhat with hand path direction. Subjects were less accurate at judging the direction of the hand path in an egocentric frame of reference, and were slightly poorer at discriminating between arcs of different curvature than at detecting absolute curvature. They also consistently mistook flattened ellipses and paths of decreasing curvature (inward spirals) for circles - and mistook arcs of true circles for arcs of tall ellipses or outward spirals. Nevertheless, the sensitivity of haptic perception compared well with that of spatial vision in other studies. Furthermore, subjects detected curvature and directional deviations much smaller than those that actually arise for most reaching movements. These findings suggest that our haptic sense is acute enough to guide and train motor systems and to form accurate representations of shapes.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A14	`01`			`@1 Department of Neuroscience, University of Minnesota @2 Minneapolis, MN 55455 @3 USA @Z 1 aut. @Z 2 aut.`
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N21				`@1 096`

Format Inist (serveur)

NO :	PASCAL 04-0153273 INIST
ET :	Bias and sensitivity in the haptic perception of geometry
AU :	HENRIQUES (Denise Y. P.); SOECHTING (John F.)
AF :	Department of Neuroscience, University of Minnesota/Minneapolis, MN 55455/Etats-Unis (1 aut., 2 aut.); Department of Neuroscience, University of Minnesota, 6-145 Jackson Hall, 321 Church St./Minneapolis, MN 55455/Etats-Unis (1 aut.)
DT :	Publication en série; Niveau analytique
SO :	Experimental brain research; ISSN 0014-4819; Coden EXBRAP; Allemagne; Da. 2003; Vol. 150; No. 1; Pp. 95-108; Bibl. 36 ref.
LA :	Anglais
EA :	Our ability to recognize and manipulate objects relies on our haptic sense of the objects' geometry. But little is known about the acuity of haptic perception compared to other senses like sight and hearing. Here, we determined how accurately humans could sense various geometric features of objects across the workspace. Subjects gripped the handle of a robot arm which was programmed to keep the hand inside a planar region with straight or curved boundaries. With eyes closed, subjects moved the manipulandum along this virtual wall and judged its curvature or direction. We mapped their sensitivity in different parts of the workspace. We also tested subjects' ability to discriminate between boundaries with different degrees of curvature, to sense the rate of change of curvature, and to detect the elongation or flattening of ellipses. We found that subjects' estimates of the curvature of their hand path were close to veridical, and did not change across the workspace though they did vary somewhat with hand path direction. Subjects were less accurate at judging the direction of the hand path in an egocentric frame of reference, and were slightly poorer at discriminating between arcs of different curvature than at detecting absolute curvature. They also consistently mistook flattened ellipses and paths of decreasing curvature (inward spirals) for circles - and mistook arcs of true circles for arcs of tall ellipses or outward spirals. Nevertheless, the sensitivity of haptic perception compared well with that of spatial vision in other studies. Furthermore, subjects detected curvature and directional deviations much smaller than those that actually arise for most reaching movements. These findings suggest that our haptic sense is acute enough to guide and train motor systems and to form accurate representations of shapes.
CC :	002A25E
FD :	Main; Tâche manuelle; Courbure; Mouvement orienté; Guide; Kinesthésie; Psychophysique; Sensibilité tactile; Vision; Coordination sensorimotrice; Contrôle moteur; Homme; Perception haptique
ED :	Hand; Manual task; Curvature; Goal directed movement; Guide; Kinesthesia; Psychophysics; Tactile sensitivity; Vision; Sensorimotor coordination; Motor control; Human; Haptic perception
SD :	Mano; Tarea manual; Curvatura; Movimiento orientado; Guía; Kinestesia; Psicofísica; Sensibilidad tactil; Visión; Coordinación sensoriomotora; Control motor; Hombre
LO :	INIST-12535.354000116254320120
ID :	04-0153273

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Pascal:04-0153273

Le document en format XML

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<front><div type="abstract" xml:lang="en">Our ability to recognize and manipulate objects relies on our haptic sense of the objects' geometry. But little is known about the acuity of haptic perception compared to other senses like sight and hearing. Here, we determined how accurately humans could sense various geometric features of objects across the workspace. Subjects gripped the handle of a robot arm which was programmed to keep the hand inside a planar region with straight or curved boundaries. With eyes closed, subjects moved the manipulandum along this virtual wall and judged its curvature or direction. We mapped their sensitivity in different parts of the workspace. We also tested subjects' ability to discriminate between boundaries with different degrees of curvature, to sense the rate of change of curvature, and to detect the elongation or flattening of ellipses. We found that subjects' estimates of the curvature of their hand path were close to veridical, and did not change across the workspace though they did vary somewhat with hand path direction. Subjects were less accurate at judging the direction of the hand path in an egocentric frame of reference, and were slightly poorer at discriminating between arcs of different curvature than at detecting absolute curvature. They also consistently mistook flattened ellipses and paths of decreasing curvature (inward spirals) for circles - and mistook arcs of true circles for arcs of tall ellipses or outward spirals. Nevertheless, the sensitivity of haptic perception compared well with that of spatial vision in other studies. Furthermore, subjects detected curvature and directional deviations much smaller than those that actually arise for most reaching movements. These findings suggest that our haptic sense is acute enough to guide and train motor systems and to form accurate representations of shapes.</div>
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<server><NO>PASCAL 04-0153273 INIST</NO>
<ET>Bias and sensitivity in the haptic perception of geometry</ET>
<AU>HENRIQUES (Denise Y. P.); SOECHTING (John F.)</AU>
<AF>Department of Neuroscience, University of Minnesota/Minneapolis, MN 55455/Etats-Unis (1 aut., 2 aut.); Department of Neuroscience, University of Minnesota, 6-145 Jackson Hall, 321 Church St./Minneapolis, MN 55455/Etats-Unis (1 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Experimental brain research; ISSN 0014-4819; Coden EXBRAP; Allemagne; Da. 2003; Vol. 150; No. 1; Pp. 95-108; Bibl. 36 ref.</SO>
<LA>Anglais</LA>
<EA>Our ability to recognize and manipulate objects relies on our haptic sense of the objects' geometry. But little is known about the acuity of haptic perception compared to other senses like sight and hearing. Here, we determined how accurately humans could sense various geometric features of objects across the workspace. Subjects gripped the handle of a robot arm which was programmed to keep the hand inside a planar region with straight or curved boundaries. With eyes closed, subjects moved the manipulandum along this virtual wall and judged its curvature or direction. We mapped their sensitivity in different parts of the workspace. We also tested subjects' ability to discriminate between boundaries with different degrees of curvature, to sense the rate of change of curvature, and to detect the elongation or flattening of ellipses. We found that subjects' estimates of the curvature of their hand path were close to veridical, and did not change across the workspace though they did vary somewhat with hand path direction. Subjects were less accurate at judging the direction of the hand path in an egocentric frame of reference, and were slightly poorer at discriminating between arcs of different curvature than at detecting absolute curvature. They also consistently mistook flattened ellipses and paths of decreasing curvature (inward spirals) for circles - and mistook arcs of true circles for arcs of tall ellipses or outward spirals. Nevertheless, the sensitivity of haptic perception compared well with that of spatial vision in other studies. Furthermore, subjects detected curvature and directional deviations much smaller than those that actually arise for most reaching movements. These findings suggest that our haptic sense is acute enough to guide and train motor systems and to form accurate representations of shapes.</EA>
<CC>002A25E</CC>
<FD>Main; Tâche manuelle; Courbure; Mouvement orienté; Guide; Kinesthésie; Psychophysique; Sensibilité tactile; Vision; Coordination sensorimotrice; Contrôle moteur; Homme; Perception haptique</FD>
<ED>Hand; Manual task; Curvature; Goal directed movement; Guide; Kinesthesia; Psychophysics; Tactile sensitivity; Vision; Sensorimotor coordination; Motor control; Human; Haptic perception</ED>
<SD>Mano; Tarea manual; Curvatura; Movimiento orientado; Guía; Kinestesia; Psicofísica; Sensibilidad tactil; Visión; Coordinación sensoriomotora; Control motor; Hombre</SD>
<LO>INIST-12535.354000116254320120</LO>
<ID>04-0153273</ID>
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Bias and sensitivity in the haptic perception of geometry

Bias and sensitivity in the haptic perception of geometry

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