Visual search is slowed when visuospatial working memory is occupied |
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Authors: | Email author" target="_blank">Geoffrey?F?WoodmanEmail author Steven?J?Luck |
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Institution: | (1) Department of Clinical Neuroscience, Imperial College London, Charing Cross Hospital, St. Dunstan’s Road, London, W6 8RP, UK;(2) Department of Clinical Neurology, University of Oxford, Level 6, West Wing, John Radcliffe Hospital, Headley Way, Headington, Oxford, OX3 9DU, UK;(3) UCL Institute of Cognitive Neuroscience, Alexandra House, 17 Queen Square, London, WC1N 3AR, UK;(4) Wellcome Trust Centre for Neuroimaging, UCL, 12 Queen Square, London, WC1N 3BG, UK;(5) School of Psychology, Cardiff University, Park Place, Cardiff, CF10 3AT, UK |
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Abstract: | Visual working memory plays a central role in most models of visual search. However, a recent study showed that search efficiency
was not impaired when working memory was filled to capacity by a concurrent object memory task (Woodman, Vogel, & Luck, 2001).
Objects and locations may be stored in separate working memory subsystems, and it is plausible that visual search relies on
the spatial subsystem, but not on the object subsystem. In the present study, we sought to determine whether maintaining spatial
information in visual working memory impairs the efficiency of a concurrent visual search task. Visual search efficiency and
spatial memory accuracy were both impaired when the search and the memory tasks were performed concurrently, as compared with
when the tasks were performed separately. These findings suggest that common mechanisms are used to process information during
difficult visual search tasks and to maintain spatial information in working memory. |
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