Okura M, Ikuta T
Department of Neuropsychiatry, School of Medicine, University of Tokushima, Japan.
Tokushima J Exp Med. 1996 Dec;43(3-4):121-5.
We investigated the reproducibility of random number generation task (RNG) in 18 healthy subjects. They were tested using RNG on separate days, and the degree of randomness were measured according to RNG Index, Null score and Phase. The correlation coefficient between two repeated scores (test and retest) was significantly high for all randomness measures, and RNG Index and Null score remained unchanged. Next, 10 of 18 subjects were tested again after they were provided feedback on one statistical analysis of randomness (RNG Index). The correlations between the three measures became insignificant, and both RNG Index and Null score decreased significantly after the feedback. In conclusion, RNG is a useful neuropsychological test to evaluate cognitive dysfunction which is prone to change, since we can employ it repeatedly at short intervals.
我们对18名健康受试者进行了随机数生成任务（RNG）的可重复性研究。他们在不同日期使用RNG进行测试，并根据RNG指数、无效分数和阶段来测量随机性程度。所有随机性测量指标的两次重复得分（测试和复测）之间的相关系数都显著较高，且RNG指数和无效分数保持不变。接下来，在对18名受试者中的10名提供了关于随机性的一项统计分析（RNG指数）的反馈后，再次对他们进行测试。反馈后，这三项测量指标之间的相关性变得不显著，且RNG指数和无效分数均显著下降。总之，RNG是一种有用的神经心理学测试，可用于评估易于变化的认知功能障碍，因为我们可以在短时间间隔内反复使用它。
