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Author  |
MacDonald, S.W.S.; Hultsch, D.F.; Dixon, R.A. |
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Performance variability is related to change in cognition: Evidence from the Victoria Longitudinal Study |
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Journal Article |
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2003 |
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Psychology and Aging |
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18 |
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3 |
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510-523 |
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performance variability across tasks; inconsistency; age differences; cognitive change; differences in response speed; older adults; marker of cognitive aging; Aging; Cognitive Ability; Individual Differences; Performance; Reaction Time |
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Performance variability across repeated task administrations may be an important indicator of age-related cognitive functioning. In the present investigation, the authors examined whether age differences and change in inconsistency were related to 6-year (3 occasion) cognitive change. Inconsistency scores were computed from 4 reaction time tasks performed by 446 older adults (54-89 years). Replicating previous cross-sectional results, greater inconsistency was observed for older participants even after controlling for differences in response speed. New longitudinal results demonstrated (a) associations between inconsistency at baseline measurement and 6-year change in cognitive performance; (b) longitudinal change in inconsistency; and (c) intraindividual covariation between 6-year change in inconsistency and 6-year change in level of cognitive function. These findings support the view that performance variability serves as a marker of cognitive aging. (PsycINFO Database Record (c) 2007 APA, all rights reserved) (from the journal abstract) |
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American Psychological Association |
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MacDonald, Stuart W. S., Stockholm Gerontology Research Center, Box 6401, S-113 82, Stockholm, Swede |
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0882-7974Accession Number: 2003-07824-016. First Author & Affiliation: MacDonald, Stuart W. S.; Department of Psychology, University of Victoria, Victoria, BC, Canada. Other Journal Title: Psychology and Aging. Release Date: 20031103. Publication Type: Journal (0100) Peer Reviewed Journal (0110). Media Covered: Print. Media Available: Electronic; Print. Document Type: Journal Article. Language: English. Major Descriptor: Age Differences; Aging; Cognitive Ability; Individual Differences; Performance. Minor Descriptor: Reaction Time. Classification: Gerontology (2860) . Population: Human (10) Male (30) Female (40) . Location: Canada. Age Group: Adulthood (18 yrs & older) (300) Middle Age (40-64 yrs) (360) Aged (65 yrs & older) (380) Very Old (85 yrs & older) (390) . Tests & Measures: Mini Mental State Examination; . Methodology: Empirical Study; Longitudinal Study; Quantitative Study. References Available: Y. |
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refbase @ user @ MacDonald2003 |
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5324 |
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