Individual differences in the exploration of a redundant space-time motor task
Individual differences in the exploration of a redundant space-time motor task
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DOI：
10.1016/j.neulet.2012.08.014
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发表时间：
2012-11-07
影响因子：
2.5
通讯作者：
Newell, Karl M.
中科院分区：
文献类型：
--
作者：
King, Adam C.;Ranganathan, Rajiv;Newell, Karl M.
学习运动任务的个体差异很少被评估，即使它们可能有助于我们理解运动冗余问题--即个体如何利用多种不同的策略来实现任务目标。这项研究考察了冗余运动任务中偏好运动策略的个体差异。32名参与者在一台数字化平板电脑上进行了一项恒星追踪任务，目的是将作为反馈的表现得分降至最低。表现分数是空间误差和移动时间的加权组合，这意味着多个策略可以产生相同的分数。一项聚类分析显示，根据最初的运动策略偏好，有三组截然不同的个体。这些群体不仅在初始表现上不同，而且在局部(试验到试验变化)和全局(平均变化)搜索策略上也表现出差异，这反映在空间和时间部分的差异修改上。总体而言，这个时空任务的结果表明，个体的内在动力是学习冗余运动任务的最初探索性解决方案的通道。(C)2012爱思唯尔爱尔兰有限公司。保留所有权利。
Individual differences in learning a motor task are rarely assessed even though they can potentially contribute to our understanding of the problem of motor redundancy-i.e., how individuals can exploit multiple different strategies to realize the task goal. This study examined individual variations in the preferred movement strategy of a redundant motor task. Thirty-two participants performed a star tracing task on a digitizing tablet with the goal of minimizing a performance score that was given as feedback. The performance score was a weighted combination of spatial error and movement time, meaning that multiple strategies could yield the same score. A cluster analysis revealed three distinct groups of individuals based on their initial movement strategy preferences. These groups were not only different on their initial performance, but also exhibited differences in both local (trial-to-trial change) and global (average change) search strategies that were reflected through differential modification of spatial and temporal components. Overall, the results in this space-time task reveal that the intrinsic dynamics of the individual channel the initial exploratory solutions to learning a redundant motor task. (C) 2012 Elsevier Ireland Ltd. All rights reserved.