Visual marking and change detection |
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Authors: | Jose L Herrero Ros Crawley Cees van Leeuwen Antonino Raffone |
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Institution: | (1) Department of Psychology, University of Sunderland, Sunderland, UK;(2) Laboratory for Perceptual Dynamics, RIKEN BSI, Wako, Japan;(3) Department of Psychology, University of Rome “La Sapienza”, Via dei Marsi, 78, 00185 Rome, Italy |
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Abstract: | The preview benefit from prior exposure of response-irrelevant (distracter) objects in visual search has been accounted for
in terms of top-down inhibition (i.e. visual marking), bottom-up abrupt onset capture, or asynchrony-dependent perceptual
segregation. We assess the relative contribution of abrupt onset and visual marking in a paradigm combining visual search
with a visual working memory task. We investigated time-based selection of multiple objects for storage in visual working
memory, using a change detection paradigm (Luck and Vogel in Nature 390:279–281, 1997) with distracter preview. We varied preview exposure (short vs. long), in a series of three experiments. The contribution
of asynchrony-related perceptual segregation was assessed across experiments by varying the complexity of the stimuli (colored
squares, oriented bars and oriented T-shapes) and the type of change detection (color or orientation), resulting in different
levels of perceptual segregation between visual elements. The results suggest that bottom-up abrupt onset, visual marking
and perceptual segregation factors co-operate in time-based selection for storage in visual working memory. |
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Keywords: | Visual marking Visual working memory Visual attention Change detection |
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