Predictive coding of visual motion in both monocular and binocular human visual processing
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166713176. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. |
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Description
Neural processing of sensory input in the brain takes time, and for that reason our awareness of visual events lags behind their actual occurrence. One way the brain might compensate to minimize the impact of the resulting delays is through extrapolation. Extrapolation mechanisms have been argued to underlie perceptual illusions in which moving and static stimuli are mislocalised relative to one another (such as the flashlag and related effects). However, where in the visual hierarchy such extrapolation processes take place remains unknown. Here, we address this question by identifying monocular and binocular contributions to the flash-grab illusion. In this illusion, a brief target is flashed on a moving background that reverses direction. As a result, the perceived position of the target is shifted in the direction of the reversal.We show that the illusion is attenuated, but not eliminated, when the motion reversal and the target are presented dichoptically to separate eyes. This reveals extrapolation mechanisms at both monocular and binocular processing stages contribute to the illusion. We interpret the results in a hierarchical predictive coding framework, and argue that prediction errors in this framework manifest directly as perceptual illusions.
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ID Code: | 247930 |
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Item Type: | Contribution to Journal (Journal Article) |
Refereed: | Yes |
Measurements or Duration: | 12 pages |
Keywords: | Motion extrapolation, Prediction, Predictive coding |
DOI: | 10.1167/19.1.3 |
ISSN: | 1534-7362 |
Pure ID: | 166713176 |
Funding Information: | EvH and HH were supported by the Australian Government through the Australian Research Council’s Discovery Projects funding scheme (project DP180102268). MG acknowledges a University of Queensland Fellowship (2016000071). |
Copyright Owner: | 2019 The Authors. |
Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au |
Deposited On: | 11 Apr 2024 05:59 |
Last Modified: | 12 Apr 2024 20:40 |
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