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  Using the past to estimate sensory uncertainty

Beierholm, U., Rohe, T., Ferrari, A., Stegle, O., & Noppeney, U. (submitted). Using the past to estimate sensory uncertainty.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-B9DC-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-CB8C-8
Genre: Paper

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 Creators:
Beierholm, U, Author
Rohe, T1, 2, Author              
Ferrari, A, Author
Stegle, O, Author              
Noppeney, U1, 2, 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: To form the most reliable percept of the environment, the brain needs to represent sensory uncertainty. Current theories of perceptual inference assume that the brain computes sensory uncertainty instantaneously and independently for each stimulus. In a series of psychophysics experiments human observers localized auditory signals that were presented in synchrony with spatially disparate visual signals. Critically, the visual noise changed dynamically over time with or without intermittent jumps. Our results show that observers integrate audiovisual inputs weighted by sensory reliability estimates that combine information from past and current signals as predicted by an optimal Bayesian learner or approximate strategies of exponential discounting Our results challenge classical models of perceptual inference where sensory uncertainty estimates depend only on the current stimulus. They demonstrate that the brain capitalizes on the temporal dynamics of the external world and estimates sensory uncertainty by combining past experiences with new incoming sensory signals.

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 Dates: 2019-08
 Publication Status: Submitted
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1101/589275
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