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Mechanisms of percept-percept and image-percept integration in vision: behavioral and electrophysiological evidence

Dalvit, Silvia and Eimer, Martin (2011) Mechanisms of percept-percept and image-percept integration in vision: behavioral and electrophysiological evidence. Journal of Experimental Psychology: Human Perception and Performance 37 (1), pp. 1-11. ISSN 0096-1523.

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Official URL: http://dx.doi.org/10.1037/a0020371

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.

Item Type: Article
School or Research Centre: Birkbeck Schools and Research Centres > School of Science > Psychological Sciences
Depositing User: Administrator
Date Deposited: 16 Jun 2011 14:49
Last Modified: 17 Apr 2013 12:20
URI: http://eprints.bbk.ac.uk/id/eprint/3521

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