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  Objects vs. hand: the effect of knuckle misconceptions on localization task distortions

Saulton, A., Bülthoff, H., & de la Rosa, S. (2016). Objects vs. hand: the effect of knuckle misconceptions on localization task distortions. Poster presented at 46th Annual Meeting of the Society for Neuroscience (Neuroscience 2016), San Diego, CA, USA.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-7AF4-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-E1D1-0
Genre: Poster

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Saulton, A1, 2, Author              
Bülthoff, HH1, 2, 3, Author              
de la Rosa, S1, 2, 4, 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              
3Project group: Cybernetics Approach to Perception & Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_2528701              
4Project group: Social & Spatial Cognition, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_2528706              

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 Abstract: Stored representations of body size and shape as derived from somatosensation are considered to be critical components of perception and action. Recent research has shown the presence of large hand distortions in proprioceptive localization tasks consisting of an overestimation of hand width and an underestimation of finger length. Those results were interpreted as reflecting specific somatosensory perceptual distortion bound to a body model underlying position sense. One important prerequisite to this interpretation is that measured localization task distortions actually stem from body representation. In this study, we re-examine hand distortions underlying positon sense and investigate whether these distortions are body specific or due to non-perceptual factors, e.g. conceptual knowledge. Participants made localization judgments regarding the spatial position of various landmarks on occluded items including their own hand. Our results show that larger hand distortions in localization tasks are likely to be induced by participants' incorrect conceptual knowledge about hand landmarks rather than proprioceptive or somatosensory influences. Moreover, we show that once we account for such incorrect conceptual knowledge, hand distortions in localization tasks are statistically similar to those of other objects. These results suggest that localization task distortions are not specific to the hand and call for caution when interpreting localization task distortions in terms of body specific effects.

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 Dates: 2016-11
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: SaultonBd2016
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Title: 46th Annual Meeting of the Society for Neuroscience (Neuroscience 2016)
Place of Event: San Diego, CA, USA
Start-/End Date: 2016-11-12 - 2016-11-16

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Title: 46th Annual Meeting of the Society for Neuroscience (Neuroscience 2016)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 56.24 Start / End Page: - Identifier: -