Key result
Four combined D-KEFS measures predicted observed daily functioning in older adults, accounting for 26% of the variance (Pearson r = .66), with Trail Making Test-4 as the only independent predictor.
Why the study?
Do four Delis-Kaplan Executive Function System tests predict observed daily functioning in community-dwelling older adults?
Observational
Do four Delis-Kaplan Executive Function System tests predict observed daily functioning in community-dwelling older adults?
Effect estimate: Pearson r = .66
The D-KEFS tests, particularly the Trail Making Test-4, demonstrate ecological validity in predicting daily functioning in older adults.
Supports D-KEFS ecological validity for older adults' daily functioning; leaves open prospective validation before clinical adoption.
This study tested the ecological validity of four Delis-Kaplan Executive Function System (D-KEFS) tests by examining how well performance on D-KEFS measures predicted observed daily functioning in community-dwelling older adults. Older adults ages 65 to 92 years completed four D-KEFS tests requiring planning and cognitive fluency. The four combined D-KEFS measures accounted for approximately 26% of the variance in observed functional ability, when controlling for education and depression, thus supporting the ecological validity of the D-KEFS (Pearson r = .66). However, in a multiple regression analysis, the D-KEFS Trail Making Test-4 was the only measure of executive functioning that accounted for unique, independent variance in observed functional ability.
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Mitchell et al. (2008) conducted an observational in Community-dwelling older adults. Four Delis-Kaplan Executive Function System (D-KEFS) tests was evaluated on Observed daily functioning (Pearson r = .66). Four combined D-KEFS measures predicted observed daily functioning in older adults, accounting for 26% of the variance (Pearson r = .66), with Trail Making Test-4 as the only independent predictor.
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