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 and methodological statistical issues pertaining to the cross-sectional and longitudinal study of cognitive aging.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 18-33 |
| Number of pages | 16 |
| Journal | Psychology and aging |
| Volume | 14 |
| Issue number | 1 |
| DOIs | |
| State | Published - Mar 1999 |
All Science Journal Classification (ASJC) codes
- Social Psychology
- Aging
- Geriatrics and Gerontology