Department of Human Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam, Netherlands.
Biomechanics and Movement Science Program, Kinesiology and Applied Physiology, Interdisciplinary Neuroscience Program, University of Delaware, Biomedical Engineering, Mechanical Engineering, Newark, DE, USA.
Exp Brain Res. 2023 Feb;241(2):677-686. doi: 10.1007/s00221-023-06548-2. Epub 2023 Jan 20.
During reward-based motor tasks, performance failure leads to an increase in movement variability along task-relevant dimensions. These increases in movement variability are indicative of exploratory behaviour in search of a better, more successful motor action. It is unclear whether failure also induces exploration along task-irrelevant dimensions that do not influence performance. In this study, we ask whether participants would explore the task-irrelevant dimension while they performed a stencil task. With a stylus, participants applied downward, normal force that influenced whether they received reward (task-relevant) as they simultaneously made erasing-like movement patterns along the tablet that did not influence performance (task-irrelevant). In this task, the movement pattern was analyzed as the distribution of movement directions within a movement. The results showed significant exploration of task-relevant force and task-irrelevant movement patterns. We conclude that failure can induce additional movement variability along a task-irrelevant dimension.
在基于奖励的运动任务中，表现失败会导致与任务相关维度的运动可变性增加。这些运动可变性的增加表明了在搜索更好、更成功的运动动作时的探索行为。目前还不清楚失败是否也会引起对不影响性能的任务无关维度的探索。在这项研究中，我们想知道参与者在执行模板任务时是否会探索任务无关的维度。参与者使用触笔施加向下的正常力，这会影响他们是否获得奖励（与任务相关），同时他们沿着平板电脑做出类似于擦除的运动模式，这些运动模式不影响性能（与任务无关）。在这个任务中，运动模式被分析为运动中运动方向的分布。结果表明，与任务相关的力和任务无关的运动模式都有显著的探索。我们的结论是，失败会导致任务无关维度的额外运动可变性。
