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Serveur d'exploration sur les dispositifs haptiques

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Exploratory pressure influences haptic shape perception via force signals

Identifieur interne : 000D74 ( PascalFrancis/Curation ); précédent : 000D73; suivant : 000D75

Exploratory pressure influences haptic shape perception via force signals

Auteurs : Lukas Kaim [Allemagne] ; Knut Drewing [Allemagne]

Source :

RBID : Pascal:10-0213285

Descripteurs français

English descriptors

Abstract

In this study of the haptic perception of small bumps, we investigated the influence of exploratory movement variation on signal integration and the percept's reliability. When sliding across a bump on a surface, the finger follows the geometry of the bump (i.e., the position signal). At the same time, patterns of forces depending on the gradient of the bump act on the finger (i.e., the force signal; Robles-de-la-Torre & Hayward, 2001). Consistent with the maximum likelihood estimation (MLE) model, haptically perceived shape can be described by a weighted average of the shapes signaled by the position and force signals (Drewing & Ernst, 2006; Ernst & Banks, 2002). Here, we found that the weights of the position and force signals and the reliability of the shape percept depend on the pressure (and velocity) of the exploratory movement (Experiment 1). These effects could not be traced back to pressure effects on the reliability of the single signals, as would be predicted from the MLE model (Experiment 2). However, we found that the signal-specific shape estimate derived from the force signal increases with increasing pressure (Experiment 3), and this bias can explain the perceptual effects of exploratory pressure.
pA  
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A03   1    @0 Atten. percept. psychophys.
A05       @2 72
A06       @2 3
A08 01  1  ENG  @1 Exploratory pressure influences haptic shape perception via force signals
A11 01  1    @1 KAIM (Lukas)
A11 02  1    @1 DREWING (Knut)
A14 01      @1 University of Giessen @2 Giessen @3 DEU @Z 1 aut. @Z 2 aut.
A20       @1 823-838
A21       @1 2010
A23 01      @0 ENG
A43 01      @1 INIST @2 14257 @5 354000181726930270
A44       @0 0000 @1 © 2010 INIST-CNRS. All rights reserved.
A45       @0 3/4 p.
A47 01  1    @0 10-0213285
A60       @1 P
A61       @0 A
A64 01  1    @0 Attention, perception & psychophysics
A66 01      @0 USA
C01 01    ENG  @0 In this study of the haptic perception of small bumps, we investigated the influence of exploratory movement variation on signal integration and the percept's reliability. When sliding across a bump on a surface, the finger follows the geometry of the bump (i.e., the position signal). At the same time, patterns of forces depending on the gradient of the bump act on the finger (i.e., the force signal; Robles-de-la-Torre & Hayward, 2001). Consistent with the maximum likelihood estimation (MLE) model, haptically perceived shape can be described by a weighted average of the shapes signaled by the position and force signals (Drewing & Ernst, 2006; Ernst & Banks, 2002). Here, we found that the weights of the position and force signals and the reliability of the shape percept depend on the pressure (and velocity) of the exploratory movement (Experiment 1). These effects could not be traced back to pressure effects on the reliability of the single signals, as would be predicted from the MLE model (Experiment 2). However, we found that the signal-specific shape estimate derived from the force signal increases with increasing pressure (Experiment 3), and this bias can explain the perceptual effects of exploratory pressure.
C02 01  X    @0 002A26E05
C03 01  X  FRE  @0 Sensibilité tactile @5 01
C03 01  X  ENG  @0 Tactile sensitivity @5 01
C03 01  X  SPA  @0 Sensibilidad tactil @5 01
C03 02  X  FRE  @0 Perception espace @5 03
C03 02  X  ENG  @0 Space perception @5 03
C03 02  X  SPA  @0 Percepción espacio @5 03
C03 03  X  FRE  @0 Etude expérimentale @5 04
C03 03  X  ENG  @0 Experimental study @5 04
C03 03  X  SPA  @0 Estudio experimental @5 04
C03 04  X  FRE  @0 Pression @5 05
C03 04  X  ENG  @0 Pressure @5 05
C03 04  X  SPA  @0 Presión @5 05
C03 05  X  FRE  @0 Comportement explorateur @5 06
C03 05  X  ENG  @0 Exploratory behavior @5 06
C03 05  X  SPA  @0 Conducta exploradora @5 06
C03 06  X  FRE  @0 Doigt @5 07
C03 06  X  ENG  @0 Finger @5 07
C03 06  X  SPA  @0 Dedo @5 07
C03 07  X  FRE  @0 Homme @5 18
C03 07  X  ENG  @0 Human @5 18
C03 07  X  SPA  @0 Hombre @5 18
C07 01  X  FRE  @0 Perception @5 37
C07 01  X  ENG  @0 Perception @5 37
C07 01  X  SPA  @0 Percepción @5 37
N21       @1 144

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Pascal:10-0213285

Le document en format XML

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