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  • Title: Predicting age-related dual-task effects with individual differences on neuropsychological tests.
    Author: Holtzer R, Stern Y, Rakitin BC.
    Journal: Neuropsychology; 2005 Jan; 19(1):18-27. PubMed ID: 15656759.
    Abstract:
    This study examined the relation of dual-task performance to individual differences on neuropsychological tests. Neuropsychological test scores from 16 young and 16 older participants were simultaneously submitted to a factor analysis that yielded 2 factors (Attention/Executive and Memory) that differed by age and 2 (Motor Speed and Cognitive Status) that did not. Regression analyses revealed that these factors were significant predictors of performance on a delayed visual recognition task, but the relationship varied as a function of task condition. The Memory and Motor Speed factors were the strongest predictors of single-task performance, but the Attention/Executive factor was the most important predictor of dual-task performance. The authors conclude that compromised central executive may underlie age-related decline in dual-task performance.
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