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• W4312194511 endingPage "108164" @default.
• W4312194511 startingPage "108164" @default.
• W4312194511 abstract "Optic flow is an important visual cue for human perception and locomotion and naturally triggers eye movements. Here we investigate whether the perception of optic flow direction is limited or enhanced by eye movements. In Exp. 1, 23 human observers localized the focus of expansion (FOE) of an optic flow pattern; in Exp. 2, 18 observers had to detect brief visual changes at the FOE. Both tasks were completed during free viewing and fixation conditions while eye movements were recorded. Task difficulty was varied by manipulating the coherence of radial motion from the FOE (4 %-90 %). During free viewing, observers tracked the optic flow pattern with a combination of saccades and smooth eye movements. During fixation, observers nevertheless made small-scale eye movements. Despite differences in spatial scale, eye movements during free viewing and fixation were similarly directed toward the FOE (saccades) and away from the FOE (smooth tracking). Whereas FOE localization sensitivity was not affected by eye movement instructions (Exp. 1), observers' sensitivity to detect brief changes at the FOE was 27 % higher (p <.001) during free-viewing compared to fixation (Exp. 2). This performance benefit was linked to reduced saccade endpoint errors, indicating the direct beneficial impact of foveating eye movements on performance in a fine-grain perceptual task, but not during coarse perceptual localization." @default.
• W4312194511 created "2023-01-04" @default.
• W4312194511 creator A5034815400 @default.
• W4312194511 creator A5058056846 @default.
• W4312194511 date "2023-03-01" @default.
• W4312194511 modified "2023-09-23" @default.
• W4312194511 title "Eye movements during optic flow perception" @default.
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• W4312194511 doi "https://doi.org/10.1016/j.visres.2022.108164" @default.
• W4312194511 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36566560" @default.
• W4312194511 hasPublicationYear "2023" @default.
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