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ERIC Number: EJ952650
Record Type: Journal
Publication Date: 2011-Dec
Pages: 11
Abstractor: As Provided
Reference Count: 51
ISSN: ISSN-0096-1523
Time-Course of Feature-Based Top-Down Control in Saccadic Distractor Effects
Born, Sabine; Kerzel, Dirk
Journal of Experimental Psychology: Human Perception and Performance, v37 n6 p1689-1699 Dec 2011
Saccadic reaction time (SRT) is more strongly slowed by target-similar than dissimilar distractors (similarity effect). The time course of this similarity effect was investigated by varying target contrast and analyzing SRT distributions. With foveal distractors, the similarity effect increased with increasing SRT, suggesting that top-down enhancement of target features increased over time. This allowed for successful saccades to the peripheral target, but also entailed larger distraction by target-similar stimuli. Similarity effects with peripheral distractors did not increase with SRT, which we attribute to location-based inhibition containing the growing enhancement of target features. Strong inhibition was likely with peripheral distractors because they always appeared at the same task-irrelevant location. Prior inhibition with foveal distractors was weaker because this would have partially released fixation and entailed anticipations. (Contains 6 figures.)
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Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Switzerland