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The effects of eccentricity on attentional capture. | LitMetric

The effects of eccentricity on attentional capture.

Atten Percept Psychophys

Faculty of Behavioral and Movement Sciences, Cognitive Psychology, Vrije Universiteit Amsterdam, Van der Boechorststraat 7, 1081 HV, Amsterdam, The Netherlands.

Published: February 2024

Visual attention may be captured by an irrelevant yet salient distractor, thereby slowing search for a relevant target. This phenomenon has been widely studied using the additional singleton paradigm in which search items are typically all presented at one and the same eccentricity. Yet, differences in eccentricity may well bias the competition between target and distractor. Here we investigate how attentional capture is affected by the relative eccentricities of a target and a distractor. Participants searched for a shape-defined target in a grid of homogeneous nontargets of the same color. On 75% of trials, one of the nontarget items was replaced by a salient color-defined distractor. Crucially, target and distractor eccentricities were independently manipulated across three levels of eccentricity (i.e., near, middle, and far). Replicating previous work, we show that the presence of a distractor slows down search. Interestingly, capture as measured by manual reaction times was not affected by target and distractor eccentricity, whereas capture as measured by the eyes was: items close to fixation were more likely to be selected than items presented further away. Furthermore, the effects of target and distractor eccentricity were largely additive, suggesting that the competition between saliency- and relevance-driven selection was modulated by an independent eccentricity-based spatial component. Implications of the dissociation between manual and oculomotor responses are also discussed.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10806068PMC
http://dx.doi.org/10.3758/s13414-023-02735-zDOI Listing

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