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  Perceived object stability is affected by the internal representation of gravity

Fleming, R., Barnett-Cowan, M., & Bülthoff, H. (2010). Perceived object stability is affected by the internal representation of gravity. Perception, 39(ECVP Abstract Supplement), 109.

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Fleming, RW1, 2, Autor           
Barnett-Cowan, M1, 2, Autor           
Bülthoff, HH1, 2, Autor           
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              

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 Zusammenfassung: Knowing an object's physical stability affects our expectations about its behaviour and our interactions with it. Objects topple over when the gravity-projected centre-of-mass (COM) lies outside the support area. The critical angle (CA) is the orientation for which an object is perceived to be equally likely to topple over or right itself, which is influenced by global shape information about an object's COM and its orientation relative to gravity. When observers lie on their sides, the perceived direction of gravity is tilted towards the body. Here we test the hypothesis that the CA of falling objects is affected by this internal representation of gravity. Observers sat upright or lay left- or right-side-down, and observed images of objects with different 3D mass distributions that were placed close to the right edge of a table in various orientations. Observers indicated whether the objects were more likely to fall back onto or off the table. The subjective visual vertical was also tested as a measure of perceived gravity. Our results show the CA increases when lying right-side-down and decreases when left-side-down relative to an upright posture, consistent with estimating the stability of rightward falling objects as relative to perceived and not physical gravity.

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 Datum: 2010-08
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: BibTex Citekey: 6405
DOI: 10.1177/03010066100390S101
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Veranstaltung

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Titel: 33rd European Conference on Visual Perception (ECVP 2010)
Veranstaltungsort: Lausanne, Switzerland
Start-/Enddatum: 2010-08-22 - 2010-08-26

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Titel: Perception
Genre der Quelle: Zeitschrift
 Urheber:
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Ort, Verlag, Ausgabe: London : Pion Ltd.
Seiten: - Band / Heft: 39 (ECVP Abstract Supplement) Artikelnummer: - Start- / Endseite: 109 Identifikator: ISSN: 0301-0066
CoNE: https://pure.mpg.de/cone/journals/resource/954925509369