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Inhibition mediates the relationship between age cohort and virtual reality-based prospective memory.

Michael D Barnett1,2, Carmen Jia-Wen Chek1,2

  • 1Aging, Neuropsychology, and Technology (ANT) Lab, Memory Assessment and Research Center, Department of Psychology and Counseling, The University of Texas at Tyler, Tyler, United States of America.

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Older adults show lower prospective memory performance compared to younger adults. This difference is linked to reduced inhibition abilities, a key executive function, impacting daily task completion.

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Area of Science:

  • Neuroscience
  • Psychology
  • Gerontology

Background:

  • Prospective memory is crucial for daily functioning but receives limited clinical attention.
  • Executive functions are linked to prospective memory, with age-related differences observed in both.
  • Investigating age-related prospective memory decline and its executive function mediators is clinically relevant.

Purpose of the Study:

  • To examine age cohort differences in prospective memory.
  • To determine if executive functions, specifically inhibition, mediate these age differences.
  • To explore the role of cognitive flexibility in prospective memory across age groups.

Main Methods:

  • 108 healthy participants (53 young adults, 55 older adults) were recruited.
  • Neuropsychological tests included the MMSE-2-SV, WCST-64, D-KEFS CWIT, and VKP.
  • Prospective memory, inhibition, and cognitive flexibility were assessed.

Main Results:

  • Younger adults outperformed older adults on prospective memory tasks.
  • Inhibition, assessed via the D-KEFS CWIT, significantly mediated the relationship between age cohort and prospective memory.
  • Cognitive flexibility did not show a mediating effect.

Conclusions:

  • Diminished inhibition abilities in older adults may contribute to poorer prospective memory performance.
  • Executive function deficits, particularly in inhibition, are implicated in age-related prospective memory decline.
  • Understanding these mechanisms can inform interventions for older adults.