Inter-trial and redundant-signals effects in visual search and discrimination tasks: separable pre-attentive and post-selective effects
Krummenacher, J. and Grubert, A. and Muller, Hermann J. (2010) Inter-trial and redundant-signals effects in visual search and discrimination tasks: separable pre-attentive and post-selective effects. Vision Research 50 (14), pp. 1382-1395. ISSN 0042-6989.
Feature singleton search is faster when the target-defining dimension is repeated, rather than changed, across trials (Found & Müller, 1996). A similar dimension repetition benefit has been observed in a non-search (discrimination) task with a single stimulus (Mortier, Theeuwes, & Starreveld, 2005). Two experiments examined whether these effects in the two tasks originate from the same or different processing stages. Experiment 1 revealed differential feature-specific effects, and Experiment 2 differential processing of dimensionally redundant target signals between the two types of task. These dissociations support the existence of separable, pre-attentive and post-selective sources of inter-trial effects in the two tasks.
|Keyword(s) / Subject(s):||Visual search, inter-trial effects, redundancy gain, pre-attentive processing, post-selective processing, race model inequality, Grice inequality|
|School:||Birkbeck Schools and Departments > School of Science > Psychological Sciences|
|Date Deposited:||31 Mar 2011 10:41|
|Last Modified:||17 Apr 2013 12:20|
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