Different computations underlie overt presaccadic and covert spatial attention
| Autor: | Marisa Carrasco, Jasmine Pan, Hsin-Hung Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Social Psychology
genetic structures media_common.quotation_subject Experimental and Cognitive Psychology Article 03 medical and health sciences Behavioral Neuroscience 0302 clinical medicine Spatial Processing Perception Field size Psychophysics Saccades Visual attention Contrast (vision) Humans Attention 030304 developmental biology media_common 0303 health sciences Normalization model Eye movement Covert Saccade Visual Perception Psychology Neuroscience 030217 neurology & neurosurgery Photic Stimulation Psychomotor Performance Spatial Navigation |
| Zdroj: | Nat Hum Behav |
| ISSN: | 2397-3374 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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