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Related Experiment Videos

Aging and interference in verbal working memory.

T Hedden1, D Park

  • 1Department of Psychology and Institute for Social Research, University of Michigan, Ann Arbor, Michigan 48106-1248, USA. hedden@umich.edu

Psychology and Aging
|January 5, 2002
PubMed
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Older adults show greater memory interference than younger adults due to difficulties clearing irrelevant information from working memory. This sustained activation of unwanted memories impacts cognitive aging.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Aging Research

Background:

  • Inhibitory models of working memory suggest older adults struggle to delete irrelevant information.
  • This difficulty may lead to increased interference effects in memory tasks for older populations.

Purpose of the Study:

  • To investigate if older adults experience greater retroactive interference in working memory compared to younger adults.
  • To examine the role of inhibitory processes in age-related working memory differences.

Main Methods:

  • Employed an A-B, C-D retroactive interference paradigm adapted for working memory.
  • Utilized a recognition memory task with young and older adult participants, measuring accuracy and reaction time.

Main Results:

Related Experiment Videos

  • Senior adults demonstrated proportionally greater retroactive interference effects than young adults.
  • Interference was particularly pronounced when participants had to reject previously presented, interfering word pairs.
  • Data indicated similar target material activation but sustained irrelevant material activation in older adults.

Conclusions:

  • Findings support the inhibitory deficit account of cognitive aging.
  • Older adults' working memory challenges may stem from difficulties in suppressing or clearing irrelevant information.
  • Results contribute to understanding age-related changes in memory and executive functions.