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A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions
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Long trial durations normalise the interference effect and sequential updating during healthy aging.

D Aisenberg1, A Sapir2, G d'Avossa2

  • 1Department of Psychology, Zlotowski Center for Neuroscience, Ben-Gurion University of the Negev, Beer Sheva, Israel.

Acta Psychologica
|December 3, 2014
PubMed
Summary
This summary is machine-generated.

Aging impairs cognitive flexibility, leading to slower responses and greater interference in seniors during the Simon task. Increasing the inter-trial interval normalized these age-related effects, suggesting improved adaptation.

Keywords:
AgingCognitive controlSimon task

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Aging Research

Background:

  • Cognitive control mechanisms can be affected by aging.
  • The Simon task is a common paradigm to study cognitive control and interference.
  • Understanding age-related differences in cognitive flexibility is crucial.

Purpose of the Study:

  • To investigate the impact of a task-irrelevant dimension on response times in young adults and seniors.
  • To examine age-related differences in cognitive interference and adaptation using the Simon task.
  • To determine if manipulating the inter-trial interval affects these age-related cognitive control differences.

Main Methods:

  • Utilized the Simon task with congruent, incongruent, and neutral trial types.
  • Compared response times and interference effects between young adult and senior participant groups.
  • Manipulated the inter-trial interval (ITI) to assess its effect on cognitive adaptation.

Main Results:

  • Seniors exhibited a larger Simon congruency effect due to greater interference (slower on incongruent vs. neutral trials).
  • A Gratton effect (diminished Simon effect after incongruent trials) was observed in young adults but not seniors.
  • Increasing the inter-trial interval reduced the Simon effect and interference in seniors and revealed a Gratton effect.

Conclusions:

  • Aging may impair the ability to rapidly adapt behavioral strategies to changing environmental demands.
  • Cognitive flexibility, particularly in adjusting to interference, appears reduced in older adults.
  • Inter-trial interval manipulation can mitigate age-related deficits in cognitive control and enhance adaptive responding.