Braithwaite, Jason J., Hulleman, Johan, 1968- , Watson, Derrick G. and Humphreys, Glyn W.. (2006) Is it impossible to inhibit isoluminant items, or does it simply take longer? Evidence from preview search. Perception and Psychophysics, Vol.68 (No.2). pp. 290-300. ISSN 0031-5117

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Abstract

Visual search can be facilitated when participants receive a preview of half the distractors (the preview benefit in search; Watson & Humphreys, 1997). Donk and Theeuwes (2001) have argued that preview-based benefits are abolished if the display items are isoluminant to a background. This is consistent with the preview benefit being due to onset capture by the new stimuli. In contrast, the present experiments challenge this suggestion and show that preview benefits can occur under isoluminant conditions, providing that they are given enough time to occur. In Experiment 1, we showed that a preview benefit can occur even with isoluminant stimuli, provided that the old items are previewed for a sufficient time. In Experiment 2, we tested and rejected the idea that this advantage is due to low-level sensory fatigue for the preview stimuli. These findings indicate that the preview effect is not caused solely by onset capture. This research was supported by a British Academy postdoctoral fellowship awarded to the first author and an MRC grant to the fourth author.

Item Type:	Journal Article
Subjects:	B Philosophy. Psychology. Religion > BF Psychology R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Divisions:	Faculty of Science > Psychology
Library of Congress Subject Headings (LCSH):	Visual perception, Light, Human information processing, Inhibition, Brightness perception
Journal or Publication Title:	Perception and Psychophysics
Publisher:	Springer New York LLC
ISSN:	0031-5117
Date:	February 2006
Volume:	Vol.68
Number:	No.2
Page Range:	pp. 290-300
Identification Number:	10.3758/BF03193676
Status:	Peer Reviewed
Funder:	Medical Research Council (Great Britain) (MRC)
URI:	http://wrap.warwick.ac.uk/id/eprint/36124

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