Cross-sectional and longitudinal relationships among age, cognition, and processing speed.

Martin J. Sliwinski · Herman Buschke L

212 citations0/0 files storedPsychology and Aging

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Aging and Gerontology Research Dementia and Cognitive Impairment Research Cognitive Abilities and Testing

Abstract

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.

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References

1996The processing-speed theory of adult age differences in cognition.1998Manual for Raven's progressive matrices and vocabulary scales 1991Decomposing adult age differences in working memory.1982Aging and Cognitive Processes 1995Predictors of cognitive change in older persons: MacArthur studies of successful aging.1984Longitudinal Studies of Adult Psychological Development 1993Speed and intelligence in old age.1993Speed mediation of adult age differences in cognition.

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