The generalization of perceptual-motor intra-individual variability in young and old adults.
The generalization of perceptual-motor intra-individual variability in young and old adults.
复制标题
年轻人和老年人知觉运动个体内变异的普遍化。
DOI：
10.1093/geronb/61.5.p304
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Newell,KarlM
中科院分区：
文献类型：
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作者：
Sosnoff,JacobJ;Newell,KarlM
我们考察了年轻人和老年人个体内知觉-运动变异性的概括性。参与者完成了四项都需要保持稳定状态的运动任务：手指颤抖，以及一位数、两位数和三位数等长力的产生。老年人的变异性更大，变异性的时间和频率结构增加，但在震颤任务中除外。在年龄最大的年龄组中，不同任务之间的变异性大小之间存在中等程度的关联，但不同任务之间的结构性变异性测量具有更高的相关性，这种关系的强度随着年龄的增长而增加。这些发现支持这样一种假设，即老年人比年轻人更不能适应他们的知觉-运动变量的结构，以适应任务要求。
We examined the generalizability of intra-individual perceptual-motor variability in young and old adults. Participants completed four motor tasks that all required the maintenance of a steady state: finger tremor, and single-digit, two-digit, and three-digit isometric force production. Older adults had a greater amount of variability and an increased time and frequency structure of variability, except in the tremor task. There was a moderate association between the magnitudes of variability across tasks in the oldest age group, but the structural measures of variability were more highly related across tasks and the strength of this relationship increased with age. These findings support the hypothesis that older adults are less able than younger adults to adapt the structure of their perceptual-motor variability to task demands.