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A cognitive-based model of tool use in normal aging.

Mathieu Lesourd1, Josselin Baumard2,3, Christophe Jarry2,3

  • 1a Laboratoire d'Etude des Mécanismes Cognitifs (EA 3082) , Université de Lyon , Lyon , France.

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Summary

Aging negatively impacts tool use and the underlying mechanical and semantic knowledge. These distinct knowledge types are both crucial for using familiar tools effectively in older adults.

Keywords:
Tool useagingapraxiamechanical knowledgesemantic knowledge

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Area of Science:

  • Cognitive Neuroscience
  • Gerontology
  • Human Factors

Background:

  • Aging research has extensively studied cognitive domains, yet age-related effects on tool use remain underexplored.
  • Tool use relies on mechanical and semantic knowledge, but their specific roles and age-related changes are not well understood.

Purpose of the Study:

  • To investigate the impact of normal aging on familiar tool use.
  • To examine how aging affects mechanical and semantic knowledge supporting tool use.
  • To clarify the distinct and combined contributions of mechanical and semantic knowledge to tool use in older adults.

Main Methods:

  • A cohort of 98 healthy elderly adults participated in the study.
  • Participants completed a familiar tool use task, a novel tool use task (assessing mechanical knowledge), and a picture matching task (assessing semantic knowledge).

Main Results:

  • Aging significantly impairs performance on tool use tasks.
  • Age-related decline affects mechanical and semantic knowledge differently, supporting their distinct nature.
  • Both mechanical and semantic knowledge are essential for the successful use of familiar tools in aging.

Conclusions:

  • Normal aging negatively impacts both tool use abilities and the supporting knowledge systems.
  • Mechanical and semantic knowledge are distinct cognitive functions that are differentially affected by aging.
  • Understanding these age-related changes is crucial for interventions aimed at maintaining functional independence in older adults.