TitleCross-sectional and longitudinal relationships among age, cognition, and processing speed.
Publication TypeJournal Article
Year of Publication1999
AuthorsSliwinski, MJ, Buschke, H
JournalPsychol Aging
Volume14
Issue1
Pagination18-33
Date Published1999 Mar
ISSN0882-7974
KeywordsAge Factors, Aged, Aged, 80 and over, Aging, Cognition, Cross-Sectional Studies, Female, Forecasting, Humans, Likelihood Functions, Linear Models, Longitudinal Studies, Male, Models, Psychological, Neuropsychological Tests, Reaction Time, Time Factors
Abstract

<p>Cross-sectional and longitudinal age effects on cognitive function were examined in 302 older adults followed longitudinally. Processing speed was related to cognitive performance at cross-section, and change in speed predicted within-person longitudinal cognitive decline. Statistical control of processing speed greatly reduced cross-sectional age effects but did not attenuate longitudinal aging effects. This difference in processing speed's ability to account for cross-sectional and longitudinal age effects is discussed in the context of theories of cognitive aging and methodological and statistical issues pertaining to the cross-sectional and longitudinal study of cognitive aging.</p>

DOI10.1037//0882-7974.14.1.18
Alternate JournalPsychol Aging
PubMed ID10224629
Grant ListAGO3949 / AG / NIA NIH HHS / United States
HD-01799 / HD / NICHD NIH HHS / United States
R29 AG12448 / AG / NIA NIH HHS / United States