Journal
VISION RESEARCH
Volume 46, Issue 24, Pages 4118-4133Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.visres.2006.08.008
Keywords
top-down guidance; bottom-up guidance; real-world objects; attention capture; color singletons; saliency maps; eye movements; overt visual search
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Funding
- NIMH NIH HHS [R01 MH63748] Funding Source: Medline
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How do bottom-up and top-down guidance signals combine to guide search behavior? Observers searched for a target either with or without a preview (top-down manipulation) or a color singleton (bottom-up manipulation) among the display objects. With a preview, reaction times were faster and more initial eye movements were guided to the target; the singleton failed to attract initial saccades under these conditions. Only in the absence of a preview did subjects preferentially fixate the color singleton. We conclude that the search for realistic objects is guided primarily by top-down control. Implications for saliency map models of visual search are discussed. (C) 2006 Elsevier Ltd. All rights reserved.
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