Age-related effects on a novel dual-task Stroop paradigm

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Development

Background:

• The Stroop task is a standard measure of cognitive control.
• Previous studies show mixed results regarding age-related differences in Stroop performance, potentially due to participant strategies.
• Inhibitory control is crucial for Stroop task success.

Purpose of the Study:

• To investigate age-related differences in cognitive control using novel dual-task Stroop variants.
• To examine how dual-task demands influence inhibitory control and strategy use in younger and older adults.
• To clarify mixed findings on age and Stroop performance.

Main Methods:

• Thirty-three older adults and 34 younger adults participated.
• Participants completed a traditional (single-task) Stroop task and two novel dual-task Stroop variants: Color-Dual and Lexical-Dual.
• Performance was assessed based on accuracy and response latency.

Main Results:

• Older adults were selectively impaired on incongruent trials compared to younger adults in the baseline Stroop task.
• Performance was worse in the Lexical-Dual condition than the Color-Dual condition, indicating increased inhibitory control demands.
• Age interacted with trial type and dual-task type, particularly in error rates, suggesting age-related differences in inhibitory control under dual-task conditions.

Conclusions:

• Dual-task demands differentially affect Stroop performance, potentially reducing strategy use.
• Novel dual-task Stroop variants offer insights into age-related changes in cognitive control and inhibitory processes.
• Findings have implications for understanding cognitive aging and task performance in both younger and older adults.