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Validation of a Dynamic Measure of Current Cognitive Reserve in a Longitudinally Assessed Sample of Healthy Older Adults: The Tasmanian Healthy Brain Project

Summers, MJ ORCID: 0000-0002-3869-4920, Thow, M, Ward, DD ORCID: 0000-0001-5476-9526, Saunders, NLJ ORCID: 0000-0003-4609-114X, Klekociuk, SZ ORCID: 0000-0001-8654-2924, Imlach, A, Summers, JJ and Vickers, JC ORCID: 0000-0001-5671-4879 2017 , 'Validation of a Dynamic Measure of Current Cognitive Reserve in a Longitudinally Assessed Sample of Healthy Older Adults: The Tasmanian Healthy Brain Project' , Assessment , pp. 1-6 , doi: 10.1177/1073191116685806.

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Abstract

Cognitive reserve (CR) is a theoretical construct describing the underlying cognitive capacity of an individual that confersdifferential levels of resistance to, and recovery from, brain injuries of various types. To date, estimates of an individual’slevel of CR have been based on single proxy measures that are retrospective and static in nature. To develop a measure ofdynamic change in CR across a lifetime, we previously identified a latent factor, derived from an exploratory factor analysisof a large sample of healthy older adults, as current CR (cCR). In the present study, we examined the longitudinal results ofa sample of 272 older adults enrolled in the Tasmanian Healthy Brain Project. Using results from 12-month and 24-monthreassessments, we examined the longitudinal validity of the cCR factor using confirmatory factor analyses. The resultsof these analyses indicate that the cCR factor structure is longitudinally stable. These results, in conjunction with recentresults from our group demonstrating dynamic increases in cCR over time in older adults undertaking further education,lend weight to this cCR measure being a valid estimate of dynamic change in CR over time.

Item Type: Article
Authors/Creators:Summers, MJ and Thow, M and Ward, DD and Saunders, NLJ and Klekociuk, SZ and Imlach, A and Summers, JJ and Vickers, JC
Keywords: cognitive reserve, confirmatory factor analysis, older adults, education
Journal or Publication Title: Assessment
Publisher: Thousand Oaks
ISSN: 1073-1911
DOI / ID Number: 10.1177/1073191116685806
Copyright Information:

Copyright 2017 The Authors

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