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  Exploring connections between similarity and categorization using vision and touch

Cooke, T., Jäkel, F., Wallraven, C., & Bülthoff, H. (2006). Exploring connections between similarity and categorization using vision and touch. Poster presented at 9th Tübingen Perception Conference (TWK 2006), Tübingen, Germany.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-D297-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-C81F-9
Genre: Poster

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 Creators:
Cooke, T1, 2, Author              
Jäkel, F2, 3, Author              
Wallraven, C1, 2, Author              
Bülthoff, HH1, 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              
3Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497795              

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 Abstract: Similarity has been proposed as a fundamental principle underlying the formation of category structures, however, much of the research involving perceptual similarity and categorization has focused on a single modality, usually vision. Can the notion of similarity still provide a basis for explaining categorization when objects are perceived with one or more modalities? We addressed these questions by having subjects see, touch, or both see and touch novel, 3D objects which varied parametrically in shape and texture. Then, they performed a pair-wise similarity rating task and a free sorting categorization task. Using multidimensional scaling (MDS), we found that that a single underlying perceptual map whose dimensions corresponded to shape and texture could explain visual, haptic, and bimodal similarity ratings. However, the relative weights of the map’s dimensions varied according to modality: shape dominated texture when objects were seen, whereas shape and texture were equally important in the haptic and bimodal conditions. We found some evidence for a connection between similarity and categorization in a multimodal context: the probability of category membership increased with similarity, while the probability of a category boundary being placed between two stimuli decreased with similarity. Moreover, the relative weight accorded to shape and texture varied in the same way for both tasks when modality was changed. The study also demonstrates how 3D printing technology and MDS techniques can be fruitfully applied in the study of visuohaptic object processing.

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 Dates: 2006-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: BibTex Citekey: 3920
 Degree: -

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Title: 9th Tübingen Perception Conference (TWK 2006)
Place of Event: Tübingen, Germany
Start-/End Date: 2006-03-03 - 2006-03-05

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Title: 9th Tübingen Perception Conference: TWK 2006
Source Genre: Proceedings
 Creator(s):
Bülthoff, HH1, Editor            
Gillner, S, Editor
Mallot, HA, Editor            
Ulrich, R, Editor
Affiliations:
1 Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794            
Publ. Info: Kirchentellinsfurt, Germany : Knirsch
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 74 Identifier: ISBN: 3-927091-73-1