Uniform TitleThe relationship between spatial pooling and attention in saccadic and perceptual tasks
NameCohen, Elias H. (author), Schnitzer, Brian S. (author), Gersch, Timothy M. (author), Singh, Manish (author), Kowler, Eileen (author), National Institutes of Health (U.S.), National Eye Institute,
Mean size judgments,
Mean value judgments,
Center of mass,
Saccadic eye movements,
Attentional operating characteristics
DescriptionPrevious findings of saccadic errors when attempting to look at a target in the midst of distractors encouraged suggestions that pooling occurs indiscriminately, with little or no influence of a selective filter to eliminate the influence of nearby distractors. To determine the effectiveness of filtering, saccadic localization was studied for saccades made to a set of target elements (discs) interleaved with an equivalent set of distractors of a different color. With such interleaved elements, selection and spatial pooling are constrained to occur over the same spatial region. The results showed that filtering was effective and saccadic landing position was determined mainly by the target elements. Concurrent perceptual judgments made about the same stimuli (estimating the mean size of either target or distractor discs) showed better performance for the target discs than distractors, confirming that perceptual attention was allocated to the set of target elements. These results: (1) support the role of attention in setting the input to the spatial pooling process that guides saccades to spatially extended targets, and (2) show that perceptual judgments of mean value, often thought to impose modest attentional demands, are not immune to the constraints of this pre-saccadic filter.
NoteVision Research 47 (2007) 1907–1923
NoteThe published version of this article is available at: http://www.elsevier.com/locate/visres
NoteThis research was supported by Grant EY15522 from the National Eye Institute, NIH.
NoteR01 EY15522; to Eileen Kowler
CollectionKowler, Eileen Collection
Organization NameRutgers, The State University of New Jersey
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