Does differential strategy use account for age-related deficits in working-memory performance?

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Development

Background:

• The strategy-deficit hypothesis posits that age-related working memory deficits stem from differing strategy use.
• Working memory span tasks are crucial for assessing cognitive function across the lifespan.

Purpose of the Study:

• To empirically test the strategy-deficit hypothesis concerning age and working memory span.
• To investigate the role of strategy use and processing speed in age-related working memory performance.

Main Methods:

• Two experiments utilizing the Reading Span task and Operation Span task.
• Measurement of strategy use via set-by-set strategy reports.
• Assessment of individual differences in strategy use and processing speed.

Main Results:

• Individual differences in effective strategy use significantly predicted span performance.
• Young and older adults reported using comparable proportions of effective strategies.
• Processing speed significantly accounted for age-related variance in span performance.

Conclusions:

• The strategy-deficit hypothesis was not supported; age differences in effective strategy use do not explain age-related working memory deficits.
• Processing speed emerges as a critical factor in age-related declines in working memory span.
• While strategy use influences performance, it does not account for the observed age-related differences.