The tuning of human motor response to risk in a dynamic environment task.
The tuning of human motor response to risk in a dynamic environment task.
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DOI：
10.1371/journal.pone.0125461
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Sanger TD
中科院分区：
文献类型：
--
作者：
Dunning A;Ghoreyshi A;Bertucco M;Sanger TD
电机不确定性在离散或静态空间任务中的作用，如定点任务，已经在许多实验中进行了研究。这些研究表明，人类拥有内在和外在运动不确定性的内部表征，并在计划运动时补偿这种变异性。这项研究的目的是调查人类在动态环境中的动作执行过程中如何应对不确定性，尽管对动作结果的知识不确定。此外，还检查了错误或没有错误在预测风险中的作用。在实验中，受试者完成了一个在双车道道路上驾驶的模拟游戏。道路包含随机曲线，因此受试者被迫使用感觉反馈来完成任务，而不能仅依靠运动规划。风险是通过使用水平扰动来创造在崎岖道路上驾驶的错觉来操纵的，从而增加了电机的不确定性，并改变了道路的成本函数。结果表明，在动态任务中，受试者对成本和不确定性的反应是持续的，并提供了证据，表明受试者即使在没有错误的情况下也避免了风险。结果表明，人类根据成本调整他们的统计运动行为，考虑到对环境不确定性做出反应的可能结果的概率。
The role of motor uncertainty in discrete or static space tasks, such as pointing tasks, has been investigated in many experiments. These studies have shown that humans hold an internal representation of intrinsic and extrinsic motor uncertainty and compensate for this variability when planning movement. The aim of this study was to investigate how humans respond to uncertainties during movement execution in a dynamic environment despite indeterminate knowledge of the outcome of actions. Additionally, the role of errors, or lack thereof, in predicting risk was examined. In the experiment, subjects completed a driving simulation game on a two-lane road. The road contained random curves so that subjects were forced to use sensory feedback to complete the task and could not rely only on motor planning. Risk was manipulated by using horizontal perturbations to create the illusion of driving on a bumpy road, thereby imposing motor uncertainty, and altering the cost function of the road. Results suggest continual responsiveness to cost and uncertainty in a dynamic task and provide evidence that subjects avoid risk even in the absence of errors. The results suggest that humans tune their statistical motor behavior based on cost, taking into account probabilities of possible outcomes in response to environmental uncertainty.
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影响因子：
64.8
作者：
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通讯作者：
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影响因子：
5.3
作者：
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影响因子：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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作者：
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通讯作者：
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