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• W4229368144 abstract "Bayesian inference provides an elegant theoretical framework for understanding the characteristic biases and discrimination thresholds in visual speed perception. However, the framework is difficult to validate because of its flexibility and the fact that suitable constraints on the structure of the sensory uncertainty have been missing. Here, we demonstrate that a Bayesian observer model constrained by efficient coding not only well explains human visual speed perception but also provides an accurate quantitative account of the tuning characteristics of neurons known for representing visual speed. Specifically, we found that the population coding accuracy for visual speed in area MT (neural prior) is precisely predicted by the power-law, slow-speed prior extracted from fitting the Bayesian observer model to psychophysical data (behavioral prior) to the point that the two priors are indistinguishable in a cross-validation model comparison. Our results demonstrate a quantitative validation of the Bayesian observer model constrained by efficient coding at both the behavioral and neural levels.SIGNIFICANCE STATEMENT Statistical regularities of the environment play an important role in shaping both neural representations and perceptual behavior. Most previous work addressed these two aspects independently. Here we present a quantitative validation of a theoretical framework that makes joint predictions for neural coding and behavior, based on the assumption that neural representations of sensory information are efficient but also optimally used in generating a percept. Specifically, we demonstrate that the neural tuning characteristics for visual speed in brain area MT are precisely predicted by the statistical prior expectations extracted from psychophysical data. As such, our results provide a normative link between perceptual behavior and the neural representation of sensory information in the brain." @default.
• W4229368144 created "2022-05-10" @default.
• W4229368144 creator A5006725498 @default.
• W4229368144 creator A5042556986 @default.
• W4229368144 date "2022-02-15" @default.
• W4229368144 modified "2023-10-16" @default.
• W4229368144 title "Prior Expectations in Visual Speed Perception Predict Encoding Characteristics of Neurons in Area MT" @default.
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• W4229368144 doi "https://doi.org/10.1523/jneurosci.1920-21.2022" @default.
• W4229368144 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35169018" @default.
• W4229368144 hasPublicationYear "2022" @default.
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