Digital clock drawing4/9/2023 ![]() ![]() ![]() However, most studies focused on analyzing individual drawing tasks separately, and the question of how a combination of drawing tasks could improve the detection performance thus remains unexplored. Results document cognitive construct validation to digital metrics of clock drawing.Īutomatic analysis of the drawing process using a digital tablet and pen has been applied to successfully detect Alzheimer's disease (AD) and mild cognitive impairment (MCI). MCI participants showed dCDT differences relative to non-MCI peers, suggesting the dCDT may assist with classification. Between-group analyses show MCI participants generated slower command TCT, produced smaller CFA, and required more command 'think' (% Think) than 'ink' (% Ink) time.Ĭommand dCDT variables of interest were primarily processing speed and working memory dependent. For Copy, TCT, PCFL, and PFHL negatively correlated with processing speed, and CFA negatively correlated with language. ![]() Neuropsychological domains of interest included processing speed, working memory, language, and declarative memory.Īdjusting for age and premorbid cognitive reserve metrics, command TCT positively correlated with multiple cognitive domains PFHL and PCFL negatively associated with worse performance on working memory and processing speed tests. We also explored variables of percent time drawing (i.e., 'ink time') versus percent time not drawing (i.e., 'think time'). dCDT variables of interest included: total completion time (TCT), pre-first hand latency (PFHL), post-clock face latency (PCFL), and clock face area (CFA). The current investigation reports on cognitive constructs associated with selected dCDT latency and graphomotor variables and compares performances between individuals with mild cognitive impairment (MCI) and non-MCI peers.Ģ02 non-demented older adults (age 68.79 ± 6.18, 46% female, education years 16.02 ± 2.70) completed the dCDT and a comprehensive neuropsychological protocol. These variables have yet to be validated with external neuropsychological domains in non-demented adults. A digital version of the clock drawing test (dCDT) provides new latency and graphomotor behavioral measurements. ![]()
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