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Aging, focus switching, and task switching in a continuous calculation task: evidence toward a new working memory

Paul Verhaeghen1, William J Hoyer

  • 1Syracuse University, New York, NY 13244-2340, USA. pverhaeg@psych.syr.edu

Neuropsychology, Development, and Cognition. Section B, Aging, Neuropsychology and Cognition
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Summary

Older adults show specific deficits in focus switching within working memory, impacting accuracy but not response time. Global task switching abilities remain comparable across age groups, suggesting distinct cognitive processes.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Factors

Background:

  • Working memory involves maintaining and manipulating information.
  • Task switching and focus switching are key executive functions.
  • Age-related cognitive decline affects executive functions.

Purpose of the Study:

  • To investigate age differences in focus switching within working memory.
  • To compare focus switching with global task switching across age groups.
  • To identify age-related deficits in attentional control.

Main Methods:

  • Continuous calculation task with two rules (midpoint, up-and-down).
  • Assessment of younger and older adult performance on focus and task switching.
  • Ex-Gaussian decomposition analysis of response time distributions.

Main Results:

  • Age differences observed in accuracy for focus switching tasks.
  • No age differences in response time for focus switching.
  • No age differences found for global task switching performance.
  • Ex-Gaussian analysis revealed distinct effects of focus and task switching on cognitive parameters.

Conclusions:

  • Task switching and focus switching are distinct cognitive processes.
  • Older adults exhibit specific age-related deficits in focus switching accuracy.
  • Attentional control in working memory shows age-dependent changes.