Centre for Policy on Ageing
 

 
Cross-sectional and longitudinal relationships among age, cognition, and processing speed
Author(s)Martin Sliwinski, Herman Buschke
Journal titlePsychology and Aging, vol 14, no 1, March 1999
Pagespp 18-33
KeywordsCognitive processes ; Mental speed ; Mental ageing ; Age groups [elderly] ; Cross sectional surveys ; Longitudinal surveys ; United States of America.
AnnotationCross-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 ageing effects. This difference in the ability of processing speed to account for cross-sectional and longitudinal age effects is discussed in the context of theories of cognitive ageing and methodological and statistical issues pertaining to the cross-sectional and longitudinal study of cognitive ageing. (RH).
Accession NumberCPA-990825201 A
ClassmarkDA: DG: D6: BB: 3KB: 3J: 7T

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