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  Motor Representations in Visual Object Recognition

Graf, M., Helbig, H., & Kiefer, M. (2005). Motor Representations in Visual Object Recognition. Poster presented at 8th Tübinger Wahrnehmungskonferenz (TWK 2005), Tübingen, Germany.

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 Creators:
Graf, M, Author           
Helbig, HB1, 2, Author           
Kiefer, M, Author
Affiliations:
1Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              
2Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497797              

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 Abstract: It has been proposed recently that object recognition relies on coordinate transformations, i.e. on similar processes as visuomotor control [1]. Thus, the two visual streams involved in object
recognition and object-directed action may rely on common computational principles, which
provides the possibility for interactions between the two streams. Existing behavioral and neurophysiological
findings suggest that viewing manipulable objects automatically potentiates
possible actions [e.g., 2,3]. We investigated whether action knowledge has a functional role
in visual object recognition. More specifically, we used a priming paradigm to test whether
objects are recognized better when viewed after another object which affords congruent as
compared to incongruent motor interactions. Two grey-scale pictures of artifactual manipulable
objects were presented sequentially (tools, kitchen utensils, musical instruments). Subjects
were required to name the objects. The stimuli were briefly presented and masked. The presentation
time of the second object was adjusted individually in an adjustment phase so that
naming accuracy approached 80. In the congruent condition both objects afforded a similar
motor interaction, and dissimilar motor interactions in the incongruent condition. Stimulus
pairs in both conditions were matched for baseline naming accuracy, word frequency, word
length, as well as visual and semantic similarity. We found that naming accuracy was higher
in the congruent than in the incongruent condition (Experiment 1 and 2). This action congruency
effect indicates that object naming is facilitated by a previous activation of an appropriate
action representation. In two further experiments we investigated the nature of the representations
underlying the action congruency effect. The effect was reduced or absent when the
prime stimulus was inverted (Experiment 3), and when the prime was presented as a word (Experiment
4). This suggests that the action representations underlying this congruency effect
are closer to specific (parameterised) motor representations than to abstract semantic representations.
Overall, the findings suggest that the recognition of manipulable objects involves not
only visual but also action representations. These are not abstract semantic representations, but
are relatively close to motor representations.

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 Dates: 2005-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: BibTex Citekey: 3239
 Degree: -

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Title: 8th Tübinger Wahrnehmungskonferenz (TWK 2005)
Place of Event: Tübingen, Germany
Start-/End Date: 2005-02-25 - 2005-02-27

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Title: 8th Tübingen Perception Conference: TWK 2005
Source Genre: Proceedings
 Creator(s):
Bülthoff, HH1, Editor           
Mallot, HA, Editor           
Ulrich, R, Editor
Wichmann, FA1, 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: 126 Identifier: ISBN: 3-927091-70-7