Age-related difference in relationships between cognitive processing speed and general cognitive status.

Published on Mar 4, 2015in Applied Neuropsychology1.55
· DOI :10.1080/23279095.2013.860602
Helena M. K. Tam2
Estimated H-index: 2
(HKU: University of Hong Kong),
Charlene L.M. Lam3
Estimated H-index: 3
(HKU: University of Hong Kong)
+ 2 AuthorsTatia M.C. Lee41
Estimated H-index: 41
(HKU: University of Hong Kong)
General cognitive status (GCS) is a composite of cognitive abilities reflecting full function. The literature suggests a relationship between cognitive processing speed and GCS, as well as age-related changes of processing speed on cognitive performance. Therefore, this study recruited 34 younger and 39 older adults to verify age-related differences in relationships between cognitive processing speed and GCS. We measured cognitive processing speed with the Processing Speed Index of the Wechsler Adult Intelligence Scale. Findings indicated that cognitive processing speed predicted GCS in older but not younger adults. Future research may be needed to verify the training effect of processing speed on GCS. This study also further examined cognitive factors related to processing speed in aging and the relationships between cognitive processing speed and verbal fluency, cognitive inhibition, and divided attention. A stepwise regression analysis indicated that only verbal fluency contributed significantly to cog...
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