Selective attrition and intraindividual variability in response time moderate cognitive change.
Selective attrition and intraindividual variability in response time moderate cognitive change.
复制标题
选择性减员和反应时间的个体差异会调节认知变化。
DOI：
10.1080/13803395.2015.1102869
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发表时间：
2016
影响因子：
2.2
通讯作者：
MacDonald,StuartWS
中科院分区：
文献类型：
--
作者：
Yao,Christie;Stawski,RobertS;Hultsch,DavidF;MacDonald,StuartWS
目的：选择一个发展的时间度量是有用的理解的因果过程，背后的衰老相关的认知变化和认知能力下降的潜在主持人的识别。基于研究表明，自然减员时间是一个对老龄化的非规范性影响敏感的指标（例如，亚临床健康状况），我们检查的原因磨损和个体内变异（IIV）的反应时间作为预测的认知performance.Method：304社区居住的老年人（64-92岁）完成了年度评估的纵向研究。IIV是根据反应时间任务的基线表现计算的。多层次模型适合于研究模式和预测的认知changes.Results：我们发现，时间损耗与认知能力下降。更大的IIV与执行功能和情景记忆措施的下降有关。由于个人健康原因的ATBLESS也与执行功能下降相比，个人谁仍然在study.Discussion：这些研究结果表明，时间消耗是一个有用的度量代表认知变化，和原因消耗和IIV是预测的非规范性的影响，可能是在老年人的认知丧失的情况下。
Objectives: Selection of a developmental time metric is useful for understanding causal processes that underlie aging-related cognitive change and for the identification of potential moderators of cognitive decline. Building on research suggesting that time to attrition is a metric sensitive to non-normative influences of aging (e.g., subclinical health conditions), we examined reason for attrition and intraindividual variability (IIV) in reaction time as predictors of cognitive performance.Method: Three hundred and four community dwelling older adults (64–92 years) completed annual assessments in a longitudinal study. IIV was calculated from baseline performance on reaction time tasks. Multilevel models were fit to examine patterns and predictors of cognitive change.Results: We show that time to attrition was associated with cognitive decline. Greater IIV was associated with declines on executive functioning and episodic memory measures. Attrition due to personal health reasons was also associated with decreased executive functioning compared to that of individuals who remained in the study.Discussion: These findings suggest that time to attrition is a useful metric for representing cognitive change, and reason for attrition and IIV are predictive of non-normative influences that may underlie instances of cognitive loss in older adults.