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  Material Properties Determine How Force and Position Signals Combine in Haptic Shape Perception

Drewing, K., Wiecki, T., & Ernst, M. (2008). Material Properties Determine How Force and Position Signals Combine in Haptic Shape Perception. Acta Psychologica, 128(2), 264-273. doi:10.1016/j.actpsy.2008.02.002.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-C8D1-B Version Permalink: http://hdl.handle.net/21.11116/0000-0003-304F-F
Genre: Journal Article

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 Creators:
Drewing, K1, 2, Author              
Wiecki, TV2, 3, Author              
Ernst, MO1, 2, Author              
Affiliations:
1Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              
2Research Group Multisensory Perception and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497806              
3Research Group Computational Vision and Neuroscience, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497805              

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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 amp; Hayward, 2001). We show that variations in the surface’s material properties (compliance, friction) influence the sensorily available position and force signals, as well as the 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 wei ghts shifted with the signal noise, which in the present case resulted from active exploration.

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 Dates: 2008-06
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1016/j.actpsy.2008.02.002
BibTex Citekey: 5018
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Title: Acta Psychologica
  Other : Acta Psychol.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 128 (2) Sequence Number: - Start / End Page: 264 - 273 Identifier: ISSN: 0001-6918
CoNE: https://pure.mpg.de/cone/journals/resource/954925374822