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  Grasping visual illusions: No evidence for a dissociation between perception and action

Franz, V., Gegenfurtner, K., Bülthoff, H., & Fahle, M. (2000). Grasping visual illusions: No evidence for a dissociation between perception and action. Psychological Science, 11(1), 20-25. doi:10.1111/1467-9280.00209.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-E569-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-1993-9
Genre: Journal Article

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 Creators:
Franz, VH1, 2, Author              
Gegenfurtner, KR1, 2, Author              
Bülthoff, HH1, 2, Author              
Fahle, M, Author              
Affiliations:
1Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              
2Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              

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 Abstract: Neuropsychological studies prompted the theory that the primate visual system might be organized into two parallel pathways, one for conscious perception and one for guiding action. Supporting evidence in healthy subjects seemed to come from a dissociation in visual illusions: In previous studies, the Ebbinghaus (or Titchener) illusion deceived perceptual judgments of size, but only marginally influenced the size estimates used in grasping. Contrary to those results, the findings from the present study show that there is no difference in the sizes of the perceptual and grasp illusions if the perceptual and grasping tasks are appropriately matched. We show that the differences found previously can be accounted for by a hitherto unknown , nonadditive effect in the addition. We conclude that the illusion does not provide evidence for the existence of two distinct pathways for perception and action in the visual system.

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 Dates: 2000-01
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1111/1467-9280.00209
BibTex Citekey: 80
 Degree: -

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Title: Psychological Science
Source Genre: Journal
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Publ. Info: Malden, MA : Blackwell Publishers
Pages: - Volume / Issue: 11 (1) Sequence Number: - Start / End Page: 20 - 25 Identifier: ISSN: 0956-7976
CoNE: https://pure.mpg.de/cone/journals/resource/974392592005