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Characterizing executive functioning in older special populations: From cognitively elite to cognitively impaired
Stockholm University, Faculty of Social Sciences, Department of Psychology.
University of Alberta.
University of Victoria.
2009 (English)In: Neuropsychology, ISSN 0894-4105, E-ISSN 1931-1559, Vol. 23, no 6, 778-791 p.Article in journal (Refereed) Published
Abstract [en]

The authors examined the structure and invariance of executive functions (EF) across (a) a continuum of cognitive status in 3 groups of older adults (cognitively elite [CE], cognitively normal [CN], and cognitively impaired [CI]) and (b) a 3-year longitudinal interval. Using latent variable analyses (LISREL 8.80), the authors tested 3-factor models (“Inhibition”: Hayling [Burgess & Shallice, 1997], Stroop [Regard, 1981]; “Shifting”: Brixton [Burgess & Shallice, 1997], Color Trails [D’Elia et al., 1996]; and “Updating”: Reading and Computational Span [Salthouse & Babcock, 1991]) and 1-factor models within each group. Participants (initial N = 570; 53–90 years) were from the Victoria Longitudinal Study (Sample 3, Waves 1 and 2). Cross-sectionally, the authors observed a 3-factor EF structure especially for the CE group and 1-factor solutions for all 3 groups. Longitudinally, temporal invariance was supported for the 3-factor model (CE and CN groups) and the 1-factor model (CI and CN groups). Subgroups with higher cognitive status and greater 3-year stability performed better on EF factors than corresponding groups with lower cognitive status and less stability. Studies of EF structure, performance, dedifferentiation, and dysfunction will benefit from considering initial cognitive status and longitudinal stability.

Place, publisher, year, edition, pages
American Psychological Association , 2009. Vol. 23, no 6, 778-791 p.
Keyword [en]
executive functions, cognitive status, measurement invariance, aging, Victoria Longitudinal Study, executive functioning, older adults, cognitive impairment
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Research subject
URN: urn:nbn:se:su:diva-35327DOI: 10.1037/a0016743ISI: 000271689300010PubMedID: 19899836OAI: diva2:286993

This research was supported by a grant from the National Institutes of Health (National Institute on Aging) to Roger A. Dixon (R37 AG008235). Roger Dixon was also supported by the Canada Research Chairs program.

Available from: 2010-01-15 Created: 2010-01-15 Last updated: 2015-09-10Bibliographically approved

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