Involvement of memory-comparison-based change detection in visual distraction

Authors


Address reprint requests to: Motohiro Kimura, Graduate School of Education, Hokkaido University, Kita-11 Nishi-7, Kita-ku, Sapporo 060-0811, Japan. E-mail: m-kimura@edu.hokudai.ac.jp

Abstract

The involvement of memory-comparison-based change detection in visual distraction was elucidated. Not only luminance increments that engaged memory-comparison-based change detection and refractoriness-based rareness detection but also luminance decrements that engaged only memory-comparison-based change detection caused behavioral distraction, which was mirrored by a posterior negativity (240–260 ms, posterior N2) and a broad positivity (420–460 ms, P3a) that reflected attentional capture. Preceding these effects, luminance increments elicited a posterior positivity (100–120 ms, change-related positivity) and a posterior negativity (120–140 ms, change-related negativity), whereas luminance decrements elicited only a posterior positivity (160–180 ms, change-related positivity). These results suggest that memory-comparison-based change detection indexed by change-related positivity is involved in visual distraction as a result of attentional capture.

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