Supplementary Material for: The Number of Items on Each Stroop Test Card Is Unrelated to Its Sensitivity

Objects: Different variations of the Stroop Color-Word Test (SCWT) exist and the tests differ in the number of items on each test card. The optimal number of items per card of the SCWT is unclear. Methods: A comprehensive neuropsychological battery including the SCWT was administered to 237 cognitively normal controls (NC), 221 patients with mild cognitive impairment (MCI), and 160 patients with Alzheimer’s disease (AD). We compared the accuracy for different items of card C (SCWT-C10accuracy, SCWT-C24accuracy, and SCWT-C50accuracy) in distinguishing patients with MCI and AD from NC. Results: The correct responses for different items of card C were ranked in the order: NC > MCI > AD group and mild AD > moderate AD, except for SCWT-C24accuracy. The validity of SCWT-C24accuracy was similar to that of SCWT-C50accuracy for discriminating MCI and AD from NC, as well as different levels of AD. Conclusion: We concluded that the number of items on the accuracy of the response was unrelated to its sensitivity to deficits and we preferred the 24-item version in daily clinical use.研究对象：目前存在多种不同版本的斯特鲁普色词测验（Stroop Color-Word Test, SCWT），各版本题卡的项目数量各不相同，且SCWT题卡的最优项目数量尚未明确。 方法：本研究对237名认知正常对照者（cognitively normal controls, NC）、221名轻度认知障碍（mild cognitive impairment, MCI）患者以及160名阿尔茨海默病（Alzheimer’s disease, AD）患者施测了包含SCWT在内的综合神经心理成套测验。我们比较了C题卡不同项目数量下的正确率（SCWT-C10正确率、SCWT-C24正确率与SCWT-C50正确率）在区分MCI、AD患者与NC群体中的诊断效能。 结果：除SCWT-C24正确率外，C题卡不同项目的正确作答数排序均为：NC组 > MCI组 > AD组，且轻度AD患者组 > 中度AD患者组。SCWT-C24正确率在区分MCI、AD患者与NC群体，以及区分不同严重程度AD患者方面的效度，与SCWT-C50正确率相当。 结论：本研究证实，题卡项目数量与作答正确率对认知缺损的敏感性并无关联，因此我们推荐在日常临床工作中采用24项目版本的SCWT。