Executive functioning and processing speed in age-related differences in memory: Contribution of a coding task |
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Authors: | Alexia Baudouin David ClarysSandrine Vanneste Michel Isingrini |
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Affiliation: | UMR-CNRS-6234, Centre de Recherches sur la Cognition et l’Apprentissage, Université de François-Rabelais de Tours, France |
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Abstract: | The aim of the present study was to examine executive dysfunctioning and decreased processing speed as potential mediators of age-related differences in episodic memory. We compared the performances of young and elderly adults in a free-recall task. Participants were also given tests to measure executive functions and perceptual processing speed and a coding task (the Digit Symbol Substitution Test, DSST). More precisely, we tested the hypothesis that executive functions would mediate the age-related differences observed in the free-recall task better than perceptual speed. We also tested the assumption that a coding task, assumed to involve both executive processes and perceptual speed, would be the best mediator of age-related differences in memory. Findings first confirmed that the DSST combines executive processes and perceptual speed. Secondly, they showed that executive functions are a significant mediator of age-related differences in memory, and that DSST performance is the best predictor. |
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Keywords: | Aging Memory Executive function Processing speed |
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