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Integration of force and position cues for shape perception through active touch

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons84862

Drewing,  K
Max Planck Institute for Biological Cybernetics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons83906

Ernst,  MO
Research Group Multisensory Perception and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Drewing, K., & Ernst, M. (2006). Integration of force and position cues for shape perception through active touch. Brain Research, 1078(1), 92-100. doi:10.1016/j.brainres.2005.12.026.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-D2DD-8
Abstract
This article systematically explores cue integration within active touch. Our research builds upon a recently made distinction between position and force cues for haptic shape perception: When sliding a finger across a bumpy surface, the finger follows the surface geometry (position cue). At the same time the finger is exposed to forces related to the slope of the surface (force cue). Experiment 1 independently varied force and position cues to the curvature of 3D-arches. Perceived curvature could be well described as a weighted average of the two cues. Experiment 2 found more weight of the position cue for more convex high arches and higher weight of the force cue for less convex shallow arches – probably mediated through a change in relative cue reliability. Both findings are in good agreement with the Maximum-Likelihood-Estimation (MLE) model for cue integration and, thus, carrying this model over to the domain of active haptic perception.