Different computations underlie overt presaccadic and covert spatial attention.
Nat Hum Behav
; 5(10): 1418-1431, 2021 10.
Article
em En
| MEDLINE
| ID: mdl-33875838
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.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Desempenho Psicomotor
/
Movimentos Sacádicos
/
Percepção Visual
/
Processamento Espacial
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article