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The fate of task-irrelevant visual motion: perceptual load versus feature-based attention.

Taya, Shuichiro, Adams, Wendy J., Graf, Erich W. and Lavie, Nilli (2009) The fate of task-irrelevant visual motion: perceptual load versus feature-based attention. Journal of Vision, 9, (12), 12-[10pp]. (doi:10.1167/9.12.12).

Record type: Article


We tested contrasting predictions derived from perceptual load theory and from recent feature-based selection accounts. Observers viewed moving, colored stimuli and performed low or high load tasks associated with one stimulus feature, either color or motion. The resultant motion aftereffect (MAE) was used to evaluate attentional allocation. We found that task-irrelevant visual features received less attention than co-localized task-relevant features of the same objects. Moreover, when color and motion features were co-localized yet perceived to belong to two distinct surfaces, feature-based selection was further increased at the expense of object-based co-selection. Load theory predicts that the MAE for task-irrelevant motion would be reduced with a higher load color task. However, this was not seen for co-localized features; perceptual load only modulated the MAE for task-irrelevant motion when this was spatially separated from the attended color location. Our results suggest that perceptual load effects are mediated by spatial selection and do not generalize to the feature domain. Feature-based selection operates to suppress processing of task-irrelevant, co-localized features, irrespective of perceptual load

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Published date: 2009


Local EPrints ID: 69680
ISSN: 1534-7362
PURE UUID: 01ef87da-c3b1-42ef-8ef7-ce90189f1fd0
ORCID for Wendy J. Adams: ORCID iD
ORCID for Erich W. Graf: ORCID iD

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Date deposited: 26 Nov 2009
Last modified: 19 Jul 2017 00:07

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Author: Shuichiro Taya
Author: Wendy J. Adams ORCID iD
Author: Erich W. Graf ORCID iD
Author: Nilli Lavie

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