Holtzer Roee, Goldin Yelena, Donovick Peter J
Department of Neurology, Albert Einstein College of Medicine, Yeshiva University, Bronx, New York 10461, USA.
Exp Aging Res. 2009 Jul-Sep;35(3):317-26. doi: 10.1080/03610730902922119.
The authors examined whether extending the administration time of letter fluency from 1 minute per letter trial (standard administration) to 2 minutes increased the sensitivity of this test to cognitive status in aging. Participants (mean age = 84.6) were assigned to cognitive impairment (n = 20) and control (n = 40) groups. Pearson correlations and scatter plot analyses showed that associations between the Dementia Rating Scale scores and letter fluency were higher and less variable when performance on the latter was extended to 2 minutes. Analysis of variance (ANOVA) showed that the cognitive impairment group generated fewer words in the second minute of the letter fluency task compared to the control group. Finally, discriminant function analyses revealed that extending the letter fluency trials to 2 minutes increased discrimination between the control and cognitive impairment groups.
作者们研究了将字母流畅性测试的施测时间从每次字母测试1分钟（标准施测）延长至2分钟是否会提高该测试对老年人认知状态的敏感性。参与者（平均年龄 = 84.6岁）被分为认知障碍组（n = 20）和对照组（n = 40）。皮尔逊相关性分析和散点图分析表明，当字母流畅性测试的施测时间延长至2分钟时，痴呆评定量表得分与字母流畅性之间的关联更强且变异性更小。方差分析（ANOVA）表明，与对照组相比，认知障碍组在字母流畅性任务的第二分钟生成的单词更少。最后，判别函数分析表明，将字母流畅性测试延长至2分钟可提高对照组与认知障碍组之间的区分度。
