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Journal Article

Citation

Dalvit S, Eimer M. J. Exp. Psychol. Hum. Percept. Perform. 2011; 37(1): 1-11.

Copyright

(Copyright © 2011, American Psychological Association)

DOI

10.1037/a0020371

PMID

21038994

Abstract

Previous research has shown that the detection of a visual target can be guided not only by the temporal integration of two percepts, but also by integrating a percept and an image held in working memory. Behavioral and event-related brain potential (ERP) measures were obtained in a target detection task that required temporal integration of 2 successively presented stimuli in the left or right hemifield. Task performance was good when both displays followed each other immediately (percept-percept integration) and when displays were separated by a 300- or 900-ms interval (image-percept integration), but was poor with intermediate interstimulus intervals. An enhanced posterior negativity at electrodes contralateral to the side of the target was observed for percept-percept and for image-percept integration, demonstrating that both are based on spatiotopic representations. However, this contralateral negativity emerged later and was more sustained on trials with long interstimulus intervals, indicating that image-percept integration is slower and involves a sustained activation of working memory. (PsycINFO Database Record (c) 2010 APA, all rights reserved).


Language: en

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