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Ecological Relevance Determines Task Priority in Older Adults' Multitasking.

Michail Doumas1, Ralf Th Krampe2

  • 1Department of Psychology, University of Leuven, Belgium. School of Psychology, Queen's University Belfast, UK. m.doumas@qub.ac.uk.

The Journals of Gerontology. Series B, Psychological Sciences and Social Sciences
|October 24, 2013
PubMed
Summary
This summary is machine-generated.

Older adults show significant multitasking costs, especially with complex tasks. However, they prioritize ecologically relevant tasks like postural control when facing high cognitive and motor demands.

Keywords:
AgingDual taskingMultitaskingPostural controlSensorimotor controlWorking memory.

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Area of Science:

  • Cognitive psychology
  • Neuroscience
  • Human factors engineering

Background:

  • Multitasking presents challenges, particularly when tasks differ in nature.
  • Older adults often exhibit performance decrements (dual-task costs) in combined cognitive and motor tasks.
  • Previous research shows varied cost patterns and unclear resource allocation strategies in older adults.

Purpose of the Study:

  • To investigate how young and older adults manage multitasking involving working memory and sensorimotor tasks of varying ecological relevance.
  • To examine performance costs across single-, dual-, and triple-task conditions.
  • To elucidate resource allocation strategies in older adults during complex multitasking.

Main Methods:

  • Participants: Young and older adults.
  • Tasks: Working memory, low-relevance sensorimotor (finger force control), high-relevance sensorimotor (postural control).
  • Conditions: Single-task, dual-task, and triple-task performance were assessed.

Main Results:

  • Working memory accuracy decreased in dual-task and further in triple-task conditions.
  • Sensorimotor performance declined with age and task difficulty.
  • In triple-task scenarios, older adults prioritized postural control over memory and force control.

Conclusions:

  • Ecological relevance is a critical determinant of how older adults allocate resources during multitasking.
  • Older adults strategically prioritize essential sensorimotor tasks, like maintaining balance, under high-demand conditions.