Davoudi Anis, Dion Catherine, Amini Shawna, Libon David J, Tighe Patrick J, Price Catherine C, Rashidi Parisa
Annu Int Conf IEEE Eng Med Biol Soc. 2020 Jul;2020:5657-5660. doi: 10.1109/EMBC44109.2020.9176469.
The Clock Drawing Test, where the participant is asked to draw a clock from memory and copy a model clock, is widely used for screening of cognitive impairment. The digital version of the clock test, the digital clock drawing test (dCDT), employs accelerometer and pressure sensors of a digital pen to capture time and pressure information from a participant's performance in a granular digital format. While visual features of the clock drawing test have previously been studied, little is known about the relationship between demographic and cognitive impairment characteristics with dCDT latency and graphomotor features. Here, we examine dCDT feature clusters with respect to sociodemographic and cognitive impairment outcomes. Our results show that the clusters are not significantly different in terms of age and gender, but did significantly differ in terms of education, Mini-Mental State Exam scores, and cognitive impairment diagnoses.This study shows that features extracted from digital clock drawings can provide important information regarding cognitive reserve and cognitive impairments.
时钟绘画测试要求参与者凭记忆画一个时钟并复制一个模型时钟，该测试被广泛用于认知障碍的筛查。时钟测试的数字版本，即数字时钟绘画测试（dCDT），利用数字笔的加速度计和压力传感器，以精细的数字格式从参与者的表现中获取时间和压力信息。虽然之前已经研究了时钟绘画测试的视觉特征，但对于人口统计学和认知障碍特征与dCDT潜伏期及书写运动特征之间的关系却知之甚少。在此，我们针对社会人口统计学和认知障碍结果来研究dCDT特征簇。我们的结果表明，这些特征簇在年龄和性别方面没有显著差异，但在教育程度、简易精神状态检查表得分和认知障碍诊断方面存在显著差异。这项研究表明，从数字时钟绘画中提取的特征可以提供有关认知储备和认知障碍的重要信息。
