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A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance

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Does initial performance variability predict dual-task optimization with practice in younger and older adults?

Tilo Strobach¹, Denis Gerstorf, François Maquestiaux

¹a Department of Psychology , Humboldt University Berlin , Berlin , Germany.

Experimental Aging Research

|December 16, 2014

Summary

This summary is machine-generated.

Early practice variability in reaction time (RT) predicts later dual-task performance improvements in both younger and older adults. This suggests variability reflects underlying neural efficiency related to executive functions.

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Area of Science:

Cognitive Psychology
Neuroscience
Human Aging Research

Background:

Reaction time (RT) variability is often linked to inefficient neural processing, especially in older adults and during complex executive function tasks.
Understanding the predictive role of early practice variability in dual-task performance is crucial for cognitive aging research.

Purpose of the Study:

To determine if early practice variability predicts later dual-task performance improvement.
To investigate if this predictive relationship differs between younger and older adults.

Main Methods:

Collected RT mean and variability data from younger and older adults across seven practice sessions in single-task and dual-task conditions.
Calculated practice benefits by comparing initial and final dual-task/single-task RTs.
Related RT and variability data to practice-related benefits.

Main Results:

Practice led to faster dual-task processing and reduced RT variability in both age groups.
Early practice variability significantly predicted dual-task practice benefits, independent of mean RTs, in both younger and older adults under specific conditions.

Conclusions:

Performance variability is linked to executive control functions under certain conditions.
Findings have implications for models of practiced dual tasks and cognitive aging.