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  Haptic Categorical Perception of Shape

Gaissert, N., Waterkamp, S., Fleming, R., & Bülthoff, I. (2012). Haptic Categorical Perception of Shape. PLoS One, 7(8), 1-7. doi:10.1371/journal.pone.0043062.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-B676-E Version Permalink: http://hdl.handle.net/21.11116/0000-0001-857B-F
Genre: Journal Article

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 Creators:
Gaissert, N1, 2, Author              
Waterkamp, S1, 2, Author              
Fleming, RW1, 2, Author              
Bülthoff, I1, 2, Author              
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Categorization and categorical perception have been extensively studied, mainly in vision and audition. In the haptic domain, our ability to categorize objects has also been demonstrated in earlier studies. Here we show for the first time that categorical perception also occurs in haptic shape perception. We generated a continuum of complex shapes by morphing between two volumetric objects. Using similarity ratings and multidimensional scaling we ensured that participants could haptically discriminate all objects equally. Next, we performed classification and discrimination tasks. After a short training with the two shape categories, both tasks revealed categorical perception effects. Training leads to between-category expansion resulting in higher discriminability of physical differences between pairs of stimuli straddling the category boundary. Thus, even brief training can alter haptic representations of shape. This suggests that the weights attached to various haptic shape features can be changed dynamically in response to top-down information about class membership.

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 Dates: 2012-08
 Publication Status: Published online
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 Identifiers: DOI: 10.1371/journal.pone.0043062
eDoc: e43062
BibTex Citekey: GaissertWFB2012
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Title: PLoS One
Source Genre: Journal
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Pages: - Volume / Issue: 7 (8) Sequence Number: - Start / End Page: 1 - 7 Identifier: -