Key result
Older age is linked to slower completion and prolonged decision latencies on digital clock drawing.
Cross-Sectional
BACKGROUND: Digital Clock Drawing Test (dCDT) technology enables the examination of detailed neurocognitive behavior as behavior unfolds in real time; a capability that cannot be obtained using a traditional pen and paper testing format. OBJECTIVE: Parameters obtained from the dCDT were used to investigate neurocognitive constructs related to higher-order neurocognitive decision making and information processing speed. The current research sought to determine the effect of age as related to combined motor and non-motor components of drawing, and higher-order decision making latencies. METHODS: A large group of stroke- and dementia- free Framingham Heart Study participants were administered the dCDT to command and copy with hands set for "10 after 11". Six age groups (age range 28-98) were constructed. RESULTS: Differences between age groups were found for total time to completion, total pen stroke count, and higher-order decision making latencies in both command and copy test conditions. CONCLUSION: Longer age-related decision making latencies may reflect a greater need for working memory and increased self-monitoring in older subjects. These latency measures have potential to serve as neurocognitive biomarkers of Alzheimer's disease and other insidious neurodegenerative disorders.
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Piers et al. (2017) conducted a cross-sectional in Stroke- and dementia-free. Age vs. Different age groups was evaluated on Total time to completion, total pen stroke count, and higher-order decision making latencies. Older age was associated with longer total time to completion, altered pen stroke count, and prolonged higher-order decision making latencies on the Digital Clock Drawing Test.
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