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Author (up) MacDonald, S.W.S.; Hultsch, D.F.; Dixon, R.A. url  openurl
  Title Performance variability is related to change in cognition: Evidence from the Victoria Longitudinal Study Type Journal Article
  Year 2003 Publication Psychology and Aging Abbreviated Journal  
  Volume 18 Issue 3 Pages 510-523  
  Keywords 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  
  Abstract 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)  
  Corporate Author Thesis  
  Publisher American Psychological Association Place of Publication MacDonald, Stuart W. S., Stockholm Gerontology Research Center, Box 6401, S-113 82, Stockholm, Swede Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes 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. Approved no  
  Call Number refbase @ user @ MacDonald2003 Serial 5324  
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