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Presaccadic attention does not facilitate the detection of changes in the visual field

Gupta, P and Sridharan, D (2024) Presaccadic attention does not facilitate the detection of changes in the visual field. In: PLoS Biology, 22 (1).

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Official URL: https://doi.org/10.1371/journal.pbio.3002485


Planning a rapid eye movement (saccade) changes how we perceive our visual world. Even before we move the eyes visual discrimination sensitivity improves at the impending target of eye movements, a phenomenon termed "presaccadic attention."Yet, it is unknown if such presaccadic selection merely affects perceptual sensitivity, or also affects downstream decisional processes, such as choice bias. We report a surprising lack of presaccadic perceptual benefits in a common, everyday setting-detection of changes in the visual field. Despite the lack of sensitivity benefits, choice bias for reporting changes increased reliably for the saccade target. With independent follow-up experiments, we show that presaccadic change detection is rendered more challenging because percepts at the saccade target location are biased toward, and more precise for, only the most recent of two successive stimuli. With a Bayesian model, we show how such perceptual and choice biases are crucial to explain the effects of saccade plans on change detection performance. In sum, visual change detection sensitivity does not improve presaccadically, a result that is readily explained by teasing apart distinct components of presaccadic selection. The findings may have critical implications for real-world scenarios, like driving, that require rapid gaze shifts in dynamically changing environments. © 2024 Gupta, Sridharan. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Item Type: Journal Article
Publication: PLoS Biology
Publisher: Public Library of Science
Additional Information: The copyright for this article belongs to Auhtor.
Keywords: adult; article; attention; clinical article; controlled study; eye movement; female; follow up; gaze; human; human experiment; male; normal human; REM sleep; saccadic eye movement; visual discrimination; visual field; attention; Bayes theorem; photostimulation; vision, Attention; Bayes Theorem; Eye Movements; Photic Stimulation; Saccades; Visual Fields; Visual Perception
Department/Centre: Division of Biological Sciences > Centre for Neuroscience
Date Deposited: 01 Mar 2024 11:11
Last Modified: 01 Mar 2024 11:11
URI: https://eprints.iisc.ac.in/id/eprint/84201

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