2010年11月3日,星期三

研究字节:反应时间(Gt)不一致(而非水平)可能预示成人认知能力下降







反应时间的个体差异预测了5年后的认知结局,2010年第24卷,第6期(11月),神经心理学,第731-741页。 Bielak,Allison A. M .; Hultsch,DavidF。史特劳斯,以斯帖; MacDonald,Stuart W. S .;猎人,迈克尔·A。

抽象

目的:基于表明反应时间的个体差异(不一致)对认知能力的细微变化高度敏感的研究,该研究解决了不一致的能力来预测认知状态的变化(即认知障碍,无痴呆[CIND])分类)和5年后的减员。方法:212个社区居住的老年人,最初年龄为64岁–92年,5年后仍留在研究中。从基线反应时间表现计算出不一致。根据参与者随时间变化的CIND分类将他们分为几组。使用Logistic和Cox回归。结果:在5年内仍保持或过渡为CIND的人和始终保持完整的人(例如,稳定的完整vs.稳定的CIND,Wald(1)= 7.91,p < .01, Exp(β) = 1.49). Average level of inconsistency over time was also predictive of study 在trition, for example, Wald (1) = 11.31, p < .01, Exp(β) = 1.24. Conclusions: For both outcomes, greater inconsistency was associated with a greater likelihood of being in a maladaptive group 5 years later. Variability based on moderately cognitively challenging tasks appeared to be particularly sensitive to 纵 changes in cognitive ability. Mean rate of responding was a comparable predictor of change in most instances, but individuals were 在 greater relative risk of being in a maladaptive outcome group if they were more inconsistent rather than if they were slower in responding. Implications for the potential utility of intraindividual variability in 反应时间 as an early marker of 认知能力下降 are discussed. (PsycINFO Database Record (c) 2010 预约定价安排, all rights reserved)



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