Visual marking and change detection.
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.
Herrero
Jose L
JL
Department of Psychology, University of Sunderland, Sunderland, UK.
Crawley
Ros
R
van Leeuwen
Cees
C
Raffone
Antonino
A
D000293:Adolescent; D000328:Adult; D001288:Attention / Q000502:physiology*; D003657:Decision Making / Q000502:physiology; D004192:Discrimination, Psychological / Q000502:physiology*; D005364:Field Dependence-Independence; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D008570:Memory, Short-Term / Q000502:physiology*; D010775:Photic Stimulation; D012016:Reference Values; D013997:Time Factors; D014796:Visual Perception / Q000502:physiology*
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