HapticV1, Main, Exploration, bibRecordById, pubmed:15521697

Haptic perception of virtual surfaces: Scaling subjective qualities and interstimulus differences

Identifieur interne : 006C09 ( Main/Exploration ); précédent : 006C08; suivant : 006C10

Haptic perception of virtual surfaces: Scaling subjective qualities and interstimulus differences

Auteurs : Mark Hollins [États-Unis] ; Adam Seeger [États-Unis] ; Gabriele Pelli [États-Unis] ; Russell Taylor [États-Unis]

Source :

Perception : (London. Print) [ 0301-0066 ] ; 2004.

RBID : Pascal:04-0579653

Descripteurs français

Pascal (Inist)
- Etude expérimentale, Sensibilité tactile, Surface, Psychophysique, Perception, Cognition, Homme.
Wicri :
- topic : Homme.

English descriptors

KwdEn :
- Cognition, Computer Simulation, Experimental study, Human, Humans, Neuropsychological Tests, Perception, Psychophysics, Sensory Thresholds, Surface, Surface Properties, Tactile sensitivity, Touch (physiology), Visual Perception (physiology).
MESH :
- physiology : Touch, Visual Perception.
- Computer Simulation, Humans, Neuropsychological Tests, Sensory Thresholds, Surface Properties.

Abstract

We examined, in two experiments, the perceptual scaling of the properties of haptically examined virtual surfaces, and the way in which these properties subjectively combine. Participants used a consistent movement pattern to explore, with a stylus, virtual surfaces generated by a force-feedback device. In experiment 1, four surface properties (bump size, friction, resistance to normal force, and vibration amplitude) were varied individually, in separate blocks of trials. Free magnitude estimates of the subjective dimensions corresponding to these properties showed that all four dimensions conformed closely to the power law, except at very low stimulus values. Exponents for bump size (0.80) and stiffness (1.01) were consistent with values established in earlier work with direct touch of real surfaces. Surprisingly, the exponent for stickiness, not previously measured, was much higher than those for other dimensions (1.49). In experiment 2, dimensional combinations were analyzed by asking subjects to give magnitude estimates of the subjective difference between pairs of surfaces differing in one or two properties. Magnitude estimates of a given one-dimensional difference were generally larger when the subject was pressing down firmly on the surfaces, than when only gentle downward pressure was required; this result suggests that forces generated when a surface is haptically examined are interpreted as invariant indicators of the magnitudes of the surface properties themselves. Estimates of one-dimensional differences were also used to make predictions of two-dimensional differences, under assumptions of dimensional integrality and separability. The results fell between these two sets of predictions, indicating only modest integration of surface properties examined with indirect touch.

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en">We examined, in two experiments, the perceptual scaling of the properties of haptically examined virtual surfaces, and the way in which these properties subjectively combine. Participants used a consistent movement pattern to explore, with a stylus, virtual surfaces generated by a force-feedback device. In experiment 1, four surface properties (bump size, friction, resistance to normal force, and vibration amplitude) were varied individually, in separate blocks of trials. Free magnitude estimates of the subjective dimensions corresponding to these properties showed that all four dimensions conformed closely to the power law, except at very low stimulus values. Exponents for bump size (0.80) and stiffness (1.01) were consistent with values established in earlier work with direct touch of real surfaces. Surprisingly, the exponent for stickiness, not previously measured, was much higher than those for other dimensions (1.49). In experiment 2, dimensional combinations were analyzed by asking subjects to give magnitude estimates of the subjective difference between pairs of surfaces differing in one or two properties. Magnitude estimates of a given one-dimensional difference were generally larger when the subject was pressing down firmly on the surfaces, than when only gentle downward pressure was required; this result suggests that forces generated when a surface is haptically examined are interpreted as invariant indicators of the magnitudes of the surface properties themselves. Estimates of one-dimensional differences were also used to make predictions of two-dimensional differences, under assumptions of dimensional integrality and separability. The results fell between these two sets of predictions, indicating only modest integration of surface properties examined with indirect touch.</div>
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Serveur d'exploration sur les dispositifs haptiques

Haptic perception of virtual surfaces: Scaling subjective qualities and interstimulus differences

Haptic perception of virtual surfaces: Scaling subjective qualities and interstimulus differences

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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