Journal
ARCHIVES OF CLINICAL NEUROPSYCHOLOGY
Volume 21, Issue 1, Pages 101-107Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.acn.2005.08.002
Keywords
eye-movements; age-differences; cognitive-processes; motor-processes
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Funding
- Wellcome Trust Funding Source: Medline
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Examines age-related decline in Digit-Symbol performance using variables obtained from a slow-motion analysis of a first person perspective video filmed during test completion, including superimposed cross-hairs indicating eye movements. Standard WAIS-3 DSCT scores and the video-derived variables were compared across two age groups (mean age 20 years vs. mean age 59 years). The older group performed more poorly overall, t(16)=-2.359, p=.031. The correlation between writing time per item and overall performance was (negatively) larger in the older group compared with the younger group, z=-2.180, p=.014. There was no difference between the groups' correlation coefficients with respect to key search latency and overall performance, z=-0.064, p=.525. Overall these results suggest that characterisation of the age-related slowing on Digit-Symbol tests as a psychomotor deficit is appropriate. (c) 2005 National Academy of Neuropsychology. Published by Elsevier Ltd. All rights reserved.
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