Global feature-based attention for motion and color |
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Authors: | Sàenz Melissa Bura?as Giedrius T Boynton Geoffrey M |
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Institution: | The Salk Institute for Biological Studies, Systems Neurobiology Laboratory--B, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA. |
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Abstract: | We used a divided attention psychophysical task to test the hypothesis that visual attention to a stimulus feature(1) facilitates the processing of other stimuli sharing the same feature. Performance on a dual-task was significantly better when human observers divided attention across two spatially separate stimuli sharing a common feature (same direction of motion or same color) compared to opposing features. This attentional effect was dependent upon the presence of competing stimuli. These results are consistent with a spatially global feature-based mechanism of attention that increases the response of cortical neurons tuned to an attended feature throughout the visual field. |
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Keywords: | Feature-based attention Dual-task Divided attention Psychophysics Human |
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