title: The effects of visual search efficiency on object-based attention.
abstract: The attentional prioritization hypothesis of object-based attention (Shomstein & Yantis in Perception & Psychophysics, 64, 41-51, 2002) suggests a two-stage selection process comprising an automatic spatial gradient and flexible strategic (prioritization) selection. The combined attentional priorities of these two stages of object-based selection determine the order in which participants will search the display for the presence of a target. The strategic process has often been likened to a prioritized visual search. By modifying the double-rectangle cueing paradigm (Egly, Driver, & Rafal in Journal of Experimental Psychology: General, 123, 161-177, 1994) and placing it in the context of a larger-scale visual search, we examined how the prioritization search is affected by search efficiency. By probing both targets located on the cued object and targets external to the cued object, we found that the attentional priority surrounding a selected object is strongly modulated by search mode. However, the ordering of the prioritization search is unaffected by search mode. The data also provide evidence that standard spatial visual search and object-based prioritization search may rely on distinct mechanisms. These results provide insight into the interactions between the mode of visual search and object-based selection, and help define the modulatory consequences of search efficiency for object-based attention.
authors.affiliation: Department of Psychology and Center for the Neural Basis of Cognition, Carnegie Mellon University, Pittsburgh, PA, USA, agreenb@uwm.edu.
authors.forename: Adam S
authors.initials: AS
authors.lastname: Greenberg
authors.forename: Maya
authors.initials: M
authors.lastname: Rosen
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Cutrone
authors.forename: Marlene
authors.initials: M
authors.lastname: Behrmann
mesh_terms: D000328:Adult; D059031:Anticipation, Psychological / Q000502:physiology; D001288:Attention / Q000502:physiology*; D003463:Cues; D005260:Female; D006801:Humans; D008297:Male; D010470:Perceptual Masking / Q000502:physiology; D011340:Problem Solving; D011601:Psychophysics; D011930:Reaction Time / Q000502:physiology; D013028:Space Perception / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*
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