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

Martin Sliwinski, Herman Buschke

Research output: Contribution to journalArticlepeer-review

184 Scopus citations


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 and methodological statistical issues pertaining to the cross-sectional and longitudinal study of cognitive aging.

Original languageEnglish (US)
Pages (from-to)18-33
Number of pages16
JournalPsychology and aging
Issue number1
StatePublished - Mar 1999
Externally publishedYes

ASJC Scopus subject areas

  • Social Psychology
  • Aging
  • Geriatrics and Gerontology


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