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  Causal Inference in the Perception of Verticality

de Winkel, K., & Bülthoff, H. (2017). Causal Inference in the Perception of Verticality. Poster presented at 18th International Multisensory Research Forum (IMRF 2017), Nashville, TN, USA.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-C481-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-9E27-2
Genre: Poster

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de Winkel, KN1, 2, 3, Author              
Bülthoff, HH1, 3, 4, Author              
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Project group: Motion Perception & Simulation, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_2528705              
3Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              
4Project group: Cybernetics Approach to Perception & Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_2528701              

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 Abstract: It has been proposed that the perception of 'up' is constructed by the brain as a vector sum; combining estimates of the visual vertical, the orientation of gravity, and the prior knowledge that 'up' is usually above our heads - called the idiotropic vector (Mittelstaedt, 1983). In a more recent study (Dyde et al., 2006), the weighting of the respective cues was found to be consistent with predictions from Bayesian accounts of perception. However, a study conducted in partial gravity (De Winkel et al., 2012) has shown that visual cues were discarded entirely, and that the contributions of the idiotropic vector and gravitational vertical have a dichotomous nature under conditions of reduced gravity. These findings suggest that the analogy of a vector sum does not always apply. Here we investigate how the perception of vertical is affected by intersensory discrepancies. We presented our participants with an array of visual and inertial orientation stimuli using a motion platform and a newly developed augmented reality system, and tasked them to indicate the perceived vertical. We will discuss the study's findings, and their implications for theories on orientation perception.

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 Dates: 2017-05
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: deWinkelKDB2017
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Title: 18th International Multisensory Research Forum (IMRF 2017)
Place of Event: Nashville, TN, USA
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Title: 18th International Multisensory Research Forum (IMRF 2017)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 52 - 53 Identifier: -