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  Body and objects representations are associated with similar distortions

Saulton, A., Dodds, T. J., Bülthoff, H. H., & de la Rosa, S. (2014). Body and objects representations are associated with similar distortions. Poster presented at 14th Annual Meeting of the Vision Sciences Society (VSS 2014), St. Pete Beach, FL, USA.

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アイテムのパーマリンク: https://hdl.handle.net/21.11116/0000-0001-3265-5 版のパーマリンク: https://hdl.handle.net/21.11116/0000-0001-353C-1
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 作成者:
Saulton, Aurelie1, 2, 著者           
Dodds, Trevor J1, 2, 著者           
Bülthoff, Heinrich H1, 2, 著者           
de la Rosa, Stephan1, 2, 著者           
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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, ou_1497794              

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 要旨: Stored representations of body size and shape as derived from somatosensation (body model) are considered to be critical components of perception and action. It is commonly believed that the body model can be measured using a localization task and be distinguished from other visual representations of the body using a visual template matching task. Specifically, localization tasks have shown distorted hand representations consisting of an overestimation of hand width and an underestimation of finger length [Longo and Haggard, 2010, PNAS,107 (26), 11727-11732]. In contrast, template matching tasks indicate that visual hand representations (body image) do not show such distortions [Longo and Haggard, 2012, Acta Psychologica, 141, 164-168]. We examined the specificity of the localization and visual template matching tasks to measure body related representations. Participants conducted a localization and template matching task with objects (box, post-it, rake) and their own hand. The localization task revealed that all items' dimensions were significantly distorted (all p <.0018) except for the width of the hand and rake. In contrast, the template matching task indicated no significant differences between the estimated and actual item's shape for all items (all p>0.05) except for the box (p<0.01) suggesting that the visual representation of items is almost veridical. Moreover, the performance across these tasks was significantly correlated for the hand and rake (p<.001). Overall, these results show that effects considered to be body-specific, i.e. distortions of the body model, are actually more general than previously thought as they are also observed with objects. Because localizing points on an object is unlikely to be aided by somatosensation, the assessed representations are unlikely to be mainly based on somatosensation but might reflect more general cognitive processes e.g. visual memory. These findings have important implications for the nature of the body image and the body model.

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 日付: 2014-08
 出版の状態: 出版
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 識別子(DOI, ISBNなど): DOI: 10.1167/14.10.845
BibTex参照ID: SaultonDBd2014
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イベント名: 14th Annual Meeting of the Vision Sciences Society (VSS 2014)
開催地: St. Pete Beach, FL, USA
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出版物名: Journal of Vision
種別: 学術雑誌
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ページ: - 巻号: 14 (10) 通巻号: - 開始・終了ページ: 845 識別子(ISBN, ISSN, DOIなど): -