Material properties determine how force and position signals combine in haptic shape perception

Drewing K, Wiecki TV, Ernst MO (2008)
Acta Psychologica 128(2): 264-273.

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Abstract
When integrating estimates from redundant sensory signals, humans seem to weight these estimates according to their reliabilities. In the present study, human observers used active touch to judge the curvature of a shape. The curvature was specified by positional and force signals: When a finger slides across a surface, the finger's position follows the surface geometry (position signal). At the same time, it is exposed to patterns of forces depending on the gradient of the surface (force signal; Robles-de-la-Torre, G., & Hayward, V. (2001). Force can overcome object geometry in the perception of shape through active touch. Nature, 412, 445-448). We show that variations ill the surface's material properties (compliance, friction) influence the sensorily available position and force signals, as well as the noise associated with these signals. Along with this, material properties affect the weights given to the position and force signals for curvature judgements. Our findings are consistent with the notion of an observer who weights signal estimates according to their reliabilities. That is, signal weights shifted with the signal noise, which in the present case resulted from active exploration. (c) 2008 Elsevier B.V. All rights reserved.
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Drewing K, Wiecki TV, Ernst MO. Material properties determine how force and position signals combine in haptic shape perception. Acta Psychologica. 2008;128(2):264-273.
Drewing, K., Wiecki, T. V., & Ernst, M. O. (2008). Material properties determine how force and position signals combine in haptic shape perception. Acta Psychologica, 128(2), 264-273.
Drewing, K., Wiecki, T. V., and Ernst, M. O. (2008). Material properties determine how force and position signals combine in haptic shape perception. Acta Psychologica 128, 264-273.
Drewing, K., Wiecki, T.V., & Ernst, M.O., 2008. Material properties determine how force and position signals combine in haptic shape perception. Acta Psychologica, 128(2), p 264-273.
K. Drewing, T.V. Wiecki, and M.O. Ernst, “Material properties determine how force and position signals combine in haptic shape perception”, Acta Psychologica, vol. 128, 2008, pp. 264-273.
Drewing, K., Wiecki, T.V., Ernst, M.O.: Material properties determine how force and position signals combine in haptic shape perception. Acta Psychologica. 128, 264-273 (2008).
Drewing, Knut, Wiecki, Thomas V., and Ernst, Marc O. “Material properties determine how force and position signals combine in haptic shape perception”. Acta Psychologica 128.2 (2008): 264-273.
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5 Citations in Europe PMC

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Visual and haptic integration in the estimation of softness of deformable objects.
Cellini C, Kaim L, Drewing K., Iperception 4(8), 2013
PMID: 25165510
Exploratory pressure influences haptic shape perception via force signals.
Kaim L, Drewing K., Atten Percept Psychophys 72(3), 2010
PMID: 20348586
Optimal integration of visual and proprioceptive movement information for the perception of trajectory geometry.
Reuschel J, Drewing K, Henriques DY, Rosler F, Fiehler K., Exp Brain Res 201(4), 2010
PMID: 19953230
Transfer of the curvature aftereffect in dynamic touch.
van der Horst BJ, Willebrands WP, Kappers AM., Neuropsychologia 46(12), 2008
PMID: 18602409

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