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Oculomotor preparation as a rehearsal mechanism in spatial working memory.

Pearson, D.G. and Ball, K. and Smith, D.T. (2014) 'Oculomotor preparation as a rehearsal mechanism in spatial working memory.', Cognition., 132 (3). pp. 416-428.

Abstract

There is little consensus regarding the specific processes responsible for encoding, maintenance, and retrieval of information in visuo-spatial working memory (VSWM). One influential theory is that VSWM may involve activation of the eye-movement (oculomotor) system. In this study we experimentally prevented healthy participants from planning or executing saccadic eye-movements during the encoding, maintenance, and retrieval stages of visual and spatial working memory tasks. Participants experienced a significant reduction in spatial memory span only when oculomotor preparation was prevented during encoding or maintenance. In contrast there was no reduction when oculomotor preparation was prevented only during retrieval. These results show that (a) involvement of the oculomotor system is necessary for optimal maintenance of directly-indicated locations in spatial working memory and (b) oculomotor preparation is not necessary during retrieval from spatial working memory. We propose that this study is the first to unambiguously demonstrate that the oculomotor system contributes to the maintenance of spatial locations in working memory independently from the involvement of covert attention.

Item Type:Article
Keywords:Visual, Spatial, Working memory, Eye movement, Attention, Saccade.
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1016/j.cognition.2014.05.006
Publisher statement:© 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).
Date accepted:10 May 2014
Date deposited:16 June 2014
Date of first online publication:06 June 2014
Date first made open access:No date available

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