Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/38593
Title: Visuospatial Working Memory Mediates Inhibitory and Facilitatory Guidance in Preview Search
Authors: Barrett, Doug J. K.
Shimozaki, Steven S.
Jensen, Silke
Zobay, Oliver
First Published: 19-May-2016
Publisher: American Psychological Association
Citation: Journal of Experimental Psychology: Human Perception and Performance, 2016, 42 (10), pp. 1533-1546
Abstract: Visual search is faster and more accurate when a subset of distractors is presented before the display containing the target. This "preview benefit" has been attributed to separate inhibitory and facilitatory guidance mechanisms during search. In the preview task the temporal cues thought to elicit inhibition and facilitation provide complementary sources of information about the likely location of the target. In this study, we use a Bayesian observer model to compare sensitivity when the temporal cues eliciting inhibition and facilitation produce complementary, and competing, sources of information. Observers searched for T-shaped targets among L-shaped distractors in 2 standard and 2 preview conditions. In the standard conditions, all the objects in the display appeared at the same time. In the preview conditions, the initial subset of distractors either stayed on the screen or disappeared before the onset of the search display, which contained the target when present. In the latter, the synchronous onset of old and new objects negates the predictive utility of stimulus-driven capture during search. The results indicate observers combine memory-driven inhibition and sensory-driven capture to reduce spatial uncertainty about the target's likely location during search. In the absence of spatially predictive onsets, memory-driven inhibition at old locations persists despite irrelevant sensory change at previewed locations. This result is consistent with a bias toward unattended objects during search via the active suppression of irrelevant capture at previously attended locations.
DOI Link: 10.1037/xhp0000239
ISSN: 0096-1523
eISSN: 1939-1277
Links: http://psycnet.apa.org/index.cfm?fa=search.displayrecord&uid=2016-24585-001
http://hdl.handle.net/2381/38593
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2016, American Psychological Association. Deposited with reference to the publisher’s open access archiving policy.
Appears in Collections:Published Articles, Dept. of Neuroscience, Psychology and Behaviour

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