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Contribution of specific cognitive processes to executive functioning in an aging population.
Melissa Lamar1, Alan B Zonderman, Susan Resnick
1Laboratory of Personality and Cognition, Gerontology Research Center, National Institute on Aging, Baltimore, Maryland 21224, USA. lamarm@lpc.grc.nia.nih.gov
Neuropsychology
|April 13, 2002
Summary
This study explored how executive functions, like Alpha Span (ASp), relate to other cognitive tasks in older adults. Findings show that attention, mental manipulation, and language ability significantly predict ASp performance.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Gerontology
Background:
- Executive functions are crucial for cognitive control.
- Understanding the interplay between executive and nonexecutive functions is vital for aging research.
Purpose of the Study:
- To investigate the relationship between Alpha Span (ASp) and other executive and nonexecutive cognitive tasks in older adults.
- To identify cognitive components that predict ASp performance.
Main Methods:
- A comprehensive cognitive battery was administered to 417 non-demented older participants.
- Correlational analyses and principal-components analysis were used.
- Regression analysis predicted ASp performance based on identified cognitive components.
Main Results:
- Age- and vocabulary-adjusted correlations revealed associations between ASp, Digit Span, and fluency tasks.
- A four-component solution emerged, with executive variables loading on all components.
- Brief attention-mental manipulation, verbal ability, and sustained attention significantly predicted ASp variance.
Conclusions:
- Executive functioning is influenced by both executive and nonexecutive cognitive aspects.
- ASp performance is predicted by a combination of cognitive abilities, highlighting a multifaceted construct.
- Future research should consider the broader cognitive landscape when examining executive functions.