Different computations underlie overt presaccadic and covert spatial attention
Hsin-Hung Li (),
Jasmine Pan and
Marisa Carrasco
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Hsin-Hung Li: New York University
Jasmine Pan: New York University
Marisa Carrasco: New York University
Nature Human Behaviour, 2021, vol. 5, issue 10, 1418-1431
Abstract:
Abstract Perception and action are tightly coupled: visual responses at the saccade target are enhanced right before saccade onset. This phenomenon, presaccadic attention, is a form of overt attention—deployment of visual attention with concurrent eye movements. Presaccadic attention is well-documented, but its underlying computational process remains unknown. This is in stark contrast to covert attention—deployment of visual attention without concurrent eye movements—for which the computational processes are well characterized by a normalization model. Here, a series of psychophysical experiments reveal that presaccadic attention modulates visual performance only via response gain changes. A response gain change was observed even when attention field size increased, violating the predictions of a normalization model of attention. Our empirical results and model comparisons reveal that the perceptual modulations by overt presaccadic and covert spatial attention are mediated through different computations.
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:nathum:v:5:y:2021:i:10:d:10.1038_s41562-021-01099-4
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DOI: 10.1038/s41562-021-01099-4
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