Top-down control of saccades requires inhibition of suddenly appearing stimuli
| Autor: | Christian Wolf, Markus Lappe |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Linguistics and Language
Eye Movements Experimental and Cognitive Psychology Article 050105 experimental psychology Language and Linguistics 03 medical and health sciences 0302 clinical medicine Eye movements and visual attention Salience (neuroscience) Reaction Time Saccades Humans Attention 0501 psychology and cognitive sciences 05 social sciences Eye movement Sensory Systems Eye Movements: Mechanisms Inhibition Psychological Saccade Psychology Neuroscience Photic Stimulation 030217 neurology & neurosurgery Sudden onset |
| Zdroj: | Attention, Perception & Psychophysics |
| ISSN: | 1943-393X 1943-3921 |
| DOI: | 10.3758/s13414-020-02101-3 |
| Popis: | Humans scan their visual environment using saccade eye movements. Where we look is influenced by bottom-up salience and top-down factors, like value. For reactive saccades in response to suddenly appearing stimuli, it has been shown that short-latency saccades are biased towards salience, and that top-down control increases with increasing latency. Here, we show, in a series of six experiments, that this transition towards top-down control is not determined by the time it takes to integrate value information into the saccade plan, but by the time it takes to inhibit suddenly appearing salient stimuli. Participants made consecutive saccades to three fixation crosses and a vertical bar consisting of a high-salient and a rewarded low-salient region. Endpoints on the bar were biased towards salience whenever it appeared or reappeared shortly before the last saccade was initiated. This was also true when the eye movement was already planned. When the location of the suddenly appearing salient region was predictable, saccades were aimed in the opposite direction to nullify this sudden onset effect. Successfully inhibiting salience, however, could only be achieved by previewing the target. These findings highlight the importance of inhibition for top-down eye-movement control. Electronic supplementary material The online version of this article (10.3758/s13414-020-02101-3) contains supplementary material, which is available to authorized users. |
| Databáze: | OpenAIRE |
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