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Updating information in verbal working memory and executive functioning.

Frédéric Doiseau1, Michel Isingrini

  • 1Université François Rabelais.

Psychological Reports
|April 14, 2005
PubMed
Summary

Older adults

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Area of Science:

  • Cognitive Psychology
  • Neuropsychology
  • Gerontology

Background:

  • Working memory is crucial for cognitive function in aging.
  • Executive functions, including updating, are vital for daily activities.
  • The Wisconsin Card Sorting Test (WCST) is a common measure of executive function.

Purpose of the Study:

  • To investigate the distinct processes within the updating working-memory task in older adults.
  • To examine the relationship between working memory updating and executive functions measured by the WCST.

Main Methods:

  • Fifty older adults completed an updating working-memory task and the WCST.
  • Factor analysis was used to identify components of the updating task.
  • Partial correlations controlled for age, education, and verbal ability.

Main Results:

  • The updating working-memory task yielded two independent factors: storage and updating.
  • WCST performance significantly correlated with the updating factor, not the storage factor.
  • This suggests distinct neural underpinnings for storage and updating processes.

Conclusions:

  • Working memory updating in older adults involves distinct processes.
  • The updating component is linked to executive-frontal functions, as measured by the WCST.
  • These findings support models of working memory involving a central executive system.

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