Can longitudinal changes in processing speed explain longitudinal age changes in fluid intelligence?
The processing-speed theory of cognitive aging contends tha age-related declines in intellectual function reflect the consequences of age-related slowing of processing speed. Cross-sectional data support this assumption. The association between 4-year changes in processing speed and 4-year changes in fluid intelligence was examined with a sample of 417 older adults. Changes in processing speed correlated .53 with changes in fluid intelligence. The difference in the explanatory power of processing speed regarding age-related differences and age-related changes is discussed with reference to other longitudinal studies and methodological considerations.
Zimprich
Daniel
D
U Heidelberg.
Martin
Mike
M
Rotman Research Inst.
D000368:Aged; D000375:Aging / Q000523:psychology*; D005260:Female; D006801:Humans; D007360:Intelligence; D008137:Longitudinal Studies; D008297:Male; D008606:Mental Processes; D008875:Middle Aged