Visual object memory and memory-guided saccades rely on shared mental representations

Experimental Brain Research
Gülden AkdalC Kennard

Abstract

We investigated the organisation of working memory processes by examining how a secondary memory task interferes with the accuracy of memory-guided saccades. A target was flashed at a random location, followed by a Kanji character. Subjects had to remember the location of the target and the Kanji character, and then they had to make a saccade towards the remembered target location. A second Kanji character was displayed and the subject had to decide if it was same or different. The performance of seven non-Kanji reader's were compared with six fluent Kanji readers in the task. Memorisation of Kanji characters was found to interfere with the accuracy of memory-guided saccades made by non-Kanji, but not by Kanji readers. These findings directly contradict accounts of working memory function which propose that spatial and visual object memory are functionally discrete.

Citations

Mar 29, 2008·PLoS Computational Biology·Yasser Roudi, Alessandro Treves
Nov 26, 2008·Brain and Cognition·S B Hutton

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