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Complex backgrounds delay low-load visual search

Complex backgrounds delay low-load visual search Spatial Vision , Vol. 20, No. 5, pp. 467 – 488 (2007)  VSP 2007. Also available online - www.brill.nl/sv Complex backgrounds delay low-load visual search ANGELA VAVASSIS ∗ and MICHAEL W. VON GRÜNAU Visual Perception Laboratory, Psychology Department, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec, H4B 1R6, Canada Received 27 March 2006; accepted 3 May 2007 Abstract —Past research has shown, separately, that endogenous location cues and high perceptual load search tasks increase the specificity of attentional deployment to task-relevant regions of the visual field, while complex task-irrelevant backgrounds greatly resembling task-relevant stimuli reduce it. Here, we investigated in the same study whether the perceptual load created by an endogenously cued set of task-relevant stimuli determines whether a surrounding complex background of similar task-irrelevant stimuli would interfere with search. Our results show that high perceptual load protects against interference from a complex background of similar but task-irrelevant stimuli, situated just beyond the boundaries of the task-relevant set. Furthermore, our findings demonstrate that search characteristics do not change when the relevant set is restricted attentionally to a smaller delineated area, even in the presence of a background. Finally, we found that the efficacy of endogenous location cueing http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Spatial Vision (continued as Seeing & Perceiving from 2010) Brill

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Publisher
Brill
Copyright
© 2007 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0169-1015
eISSN
1568-5683
DOI
10.1163/156856807781503631
pmid
17716528
Publisher site
See Article on Publisher Site

Abstract

Spatial Vision , Vol. 20, No. 5, pp. 467 – 488 (2007)  VSP 2007. Also available online - www.brill.nl/sv Complex backgrounds delay low-load visual search ANGELA VAVASSIS ∗ and MICHAEL W. VON GRÜNAU Visual Perception Laboratory, Psychology Department, Concordia University, 7141 Sherbrooke Street West, Montreal, Quebec, H4B 1R6, Canada Received 27 March 2006; accepted 3 May 2007 Abstract —Past research has shown, separately, that endogenous location cues and high perceptual load search tasks increase the specificity of attentional deployment to task-relevant regions of the visual field, while complex task-irrelevant backgrounds greatly resembling task-relevant stimuli reduce it. Here, we investigated in the same study whether the perceptual load created by an endogenously cued set of task-relevant stimuli determines whether a surrounding complex background of similar task-irrelevant stimuli would interfere with search. Our results show that high perceptual load protects against interference from a complex background of similar but task-irrelevant stimuli, situated just beyond the boundaries of the task-relevant set. Furthermore, our findings demonstrate that search characteristics do not change when the relevant set is restricted attentionally to a smaller delineated area, even in the presence of a background. Finally, we found that the efficacy of endogenous location cueing

Journal

Spatial Vision (continued as Seeing & Perceiving from 2010)Brill

Published: Jan 1, 2007

Keywords: COMPLEX BACKGROUNDS; GUIDED SEARCH; PERCEPTUAL LOAD; SIGNAL DETECTION THEORY (SDT); VISUAL ATTENTION; ENDOGENOUS LOCATION CUEING; VISUAL SEARCH

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