What needs to be explained to account for age-related effects on multiple cognitive variables?
- 1 January 2003
- journal article
- Published by American Psychological Association (APA) in Psychology and Aging
- Vol. 18 (1) , 91-110
- https://doi.org/10.1037/0882-7974.18.1.91
Abstract
Structural equation methodology was used to investigate age-related influences across a number of cognitive variables in 204 adults ranging from 18 to 91 years of age with a hierarchical structure that contained 4 1st-order factors and 1 2nd-order common factor. Direct age relations were found to the common factor as well as to 1st-order speed and memory factors. Replicability of the findings was explored by investigating the same structure of age relations, using 2 different data sets, and a similar patten was found in each. These results suggest that at least 3 statistically distinct types of age-related influences are operating on a wide variety of cognitive variables and presumably require separate explanatory mechanisms.Keywords
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