AGE-RELATED DIFFERENCES IN THE CONTROL OF SPATIAL AIMING MOVEMENTS
AGE-RELATED DIFFERENCES IN THE CONTROL OF SPATIAL AIMING MOVEMENTS
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DOI：
10.1080/02701367.1992.10608758
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发表时间：
1992-12-01
影响因子：
2.2
通讯作者：
MEEUWSEN, HJ
中科院分区：
文献类型：
--
作者：
GOGGIN, NL;MEEUWSEN, HJ
该实验的目的是（a）检查与年龄有关的差异，在控制的目标运动，（B）确定的轨迹减慢在运动执行的老年人。Fitts（1954）的难度指数（ID）被用来操纵动作执行的要求，和运动学被用来检查响应特性。12名年轻人和12名老年人进行简单的瞄准运动10厘米或20厘米的幅度为0.5厘米，1。0 cm，或2. 0 cm宽，导致ID范围为3.32至6.32。年轻和老年受试者的结果都支持运动时间（MT）作为ID的函数增加的预测，老年人比年轻人更慢，更受ID增加的影响。老年人运动的速度和加速度曲线显示出与年轻人非常不同的反应特征。结果表明，老年人强调反应的准确性，并关注运动的后一阶段，以准确地接触目标。
The experiment was designed to (a) examine age-related differences in the control of aiming movements, and (b) determine the locus of slowing in movement execution of older adults. Fitts's (1954) index of difficulty (ID) was used to manipulate movement execution demands, and kinematics were used to examine the response characteristics. Twelve young and 12 older adults performed simple aiming movements 10 cm or 20 cm in amplitude to targets of 0.5 cm, 1. 0 cm, or 2. 0 cm in width, resulting in IDs ranging from 3.32 to 6.32. The results for both young and older subjects support the prediction that movement time (MT) increases as a function of ID and that older adults are significantly slower and more affected by increases in ID than the young adults. Velocity and acceleration profiles of the older adults' movements displayed very different response characteristics than those of the young adults. The results suggest that older adults emphasize accuracy of response and are concerned with the latter phase of the movement in order to contact a target accurately.