A predictive coding account of bistable perception - a model-based fMRI study

PLoS Computational Biology
Veith A WeilnhammerKatharina Schmack

Abstract

In bistable vision, subjective perception wavers between two interpretations of a constant ambiguous stimulus. This dissociation between conscious perception and sensory stimulation has motivated various empirical studies on the neural correlates of bistable perception, but the neurocomputational mechanism behind endogenous perceptual transitions has remained elusive. Here, we recurred to a generic Bayesian framework of predictive coding and devised a model that casts endogenous perceptual transitions as a consequence of prediction errors emerging from residual evidence for the suppressed percept. Data simulations revealed close similarities between the model's predictions and key temporal characteristics of perceptual bistability, indicating that the model was able to reproduce bistable perception. Fitting the predictive coding model to behavioural data from an fMRI-experiment on bistable perception, we found a correlation across participants between the model parameter encoding perceptual stabilization and the behaviourally measured frequency of perceptual transitions, corroborating that the model successfully accounted for participants' perception. Formal model comparison with established models of bistable perception based ...Continue Reading

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Citations

Apr 25, 2018·PLoS Biology·Sam EreiraZeb Kurth-Nelson
Nov 21, 2017·PLoS Computational Biology·Stefan AlbertGaby Schneider
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Dec 15, 2020·PLoS Computational Biology·Pantelis LeptourgosSophie Denève
Nov 3, 2020·Frontiers in Psychiatry·Chun Yuen FongShinsuke Koike
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Apr 6, 2021·Neuroscience of Consciousness·Canhuang LuoAndrea Alamia
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Software Mentioned

SPM Anatomy Toolbox
SPM12
Psychophysics Toolbox
Matlab
HGF4

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