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Age-related intraindividual performance variability with practice.

Suzanne Bonneau Miller1, Katharine H Odell

  • 1California State University, Chico 95929-0350, USA. sbmiller@csuchico.edu

International Journal of Aging & Human Development
|October 26, 2007
PubMed
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Older adults show more cognitive fluctuations during practice tasks than younger adults. This suggests age-related declines in cognitive processing efficiency may occur with repeated task engagement.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Gerontology

Background:

  • Cognitive task performance can fluctuate within individuals, particularly in older populations.
  • Understanding intraindividual variability is crucial for assessing cognitive aging.

Purpose of the Study:

  • To investigate how practice affects intraindividual variability in cognitive task performance across different age groups.
  • To explore age-related differences in cognitive processing efficiency during learning.

Main Methods:

  • 34 younger (20-30 years) and 34 older (70-82 years) female participants completed a reading span task 16 times over four sessions.
  • Recall accuracy was analyzed to measure intraindividual variability across practice trials.
  • Performance fluctuations were compared between younger and older adults.

Related Experiment Videos

Main Results:

  • Older adults exhibited significantly more frequent intraindividual variability compared to younger adults.
  • Cognitive fluctuations were more pronounced in the mid to later practice trials for older individuals.
  • The pattern suggests practice may exacerbate age-related cognitive inefficiencies.

Conclusions:

  • Increased intraindividual variability in older adults indicates less stable cognitive processing with practice.
  • Findings support a resource theory framework, suggesting age-related decreases in cognitive processing efficiency.
  • Cognitive training interventions may need to account for age-related practice effects on performance stability.