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• W4213012468 abstract "Expected surprise, defined as the anticipation of uncertainty associated with the occurrence of a future event, plays a major role in gaze shifting and spatial attention. In the present study, we analyzed its impact on oculomotor behavior. We hypothesized that the occurrence of anticipatory saccades could decrease with increasing expected surprise and that its influence on visually-guided responses could be different given the presence of sensory information and perhaps competitive attentional effects. This hypothesis was tested in humans using a saccadic reaction time task in which a cue indicated the future stimulus position. In the 'no expected surprise' condition, the visual target could appear only at one previously cued location. In other conditions, more likely future positions were cued with increasing expected surprise. Anticipation was more frequent and pupil size was larger in the 'no expected surprise' condition compared with all other conditions, probably due to increased arousal. The latency of visually-guided saccades increased linearly with the logarithm of surprise (following Hick's law) but their maximum velocity repeated the arousal-related pattern. Therefore, expected surprise affects anticipatory and visually-guided responses differently. Moreover, these observations suggest a causal chain linking surprise, attention and saccades that could be disrupted in attentional or impulse control disorders." @default.
• W4213012468 created "2022-02-24" @default.
• W4213012468 creator A5025905899 @default.
• W4213012468 creator A5085071937 @default.
• W4213012468 date "2022-02-15" @default.
• W4213012468 modified "2023-09-25" @default.
• W4213012468 title "The oculomotor signature of expected surprise" @default.
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• W4213012468 doi "https://doi.org/10.1038/s41598-022-06403-4" @default.
• W4213012468 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35169177" @default.
• W4213012468 hasPublicationYear "2022" @default.
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