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在学习使用脑机接口时,目标选择与过程控制。

Goal selection versus process control while learning to use a brain-computer interface.

机构信息

Graduate Program in Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA.

出版信息

J Neural Eng. 2011 Jun;8(3):036012. doi: 10.1088/1741-2560/8/3/036012. Epub 2011 Apr 21.

Abstract

A brain-computer interface (BCI) can be used to accomplish a task without requiring motor output. Two major control strategies used by BCIs during task completion are process control and goal selection. In process control, the user exerts continuous control and independently executes the given task. In goal selection, the user communicates their goal to the BCI and then receives assistance executing the task. A previous study has shown that goal selection is more accurate and faster in use. An unanswered question is, which control strategy is easier to learn? This study directly compares goal selection and process control while learning to use a sensorimotor rhythm-based BCI. Twenty young healthy human subjects were randomly assigned either to a goal selection or a process control-based paradigm for eight sessions. At the end of the study, the best user from each paradigm completed two additional sessions using all paradigms randomly mixed. The results of this study were that goal selection required a shorter training period for increased speed, accuracy, and information transfer over process control. These results held for the best subjects as well as in the general subject population. The demonstrated characteristics of goal selection make it a promising option to increase the utility of BCIs intended for both disabled and able-bodied users.

摘要

脑机接口 (BCI) 可用于完成任务而无需进行运动输出。BCI 在完成任务期间使用的两种主要控制策略是过程控制和目标选择。在过程控制中,用户进行持续控制并独立执行给定任务。在目标选择中,用户向 BCI 传达他们的目标,然后接受协助执行任务。先前的研究表明,目标选择在使用中更准确、更快。一个未解决的问题是,哪种控制策略更容易学习?本研究在学习使用基于感觉运动节律的 BCI 时直接比较了目标选择和过程控制。二十名年轻健康的人类受试者被随机分配到基于目标选择或过程控制的范式中进行八次会话。在研究结束时,每个范式中表现最好的用户使用所有范式随机混合完成了另外两个会话。本研究的结果表明,与过程控制相比,目标选择需要更短的训练期,以提高速度、准确性和信息传输。这些结果适用于表现最好的受试者和一般受试者群体。目标选择所表现出的特点使其成为一种有前途的选择,可提高旨在为残疾和健全用户服务的 BCI 的实用性。

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