基于主动心理任务的脑机接口系统研究
发布时间：2018-08-11 12:18
【摘要】：本文是在传统P300行列闪烁实验范式的基础上进行改进,同时增加了一个主动心理任务。第一个实验中,主动心理任务实验是判别颜色,同时设计了对比实验即计数。为了进一步验证主动心理任务实验范式能提高脑机接口系统性能,我们设计了第二个实验,即主动心理任务实验是计数加判别颜色,同时设计了对比实验即计数。两个实验结果说明,主动心理任务实验比对比实验能诱发出更明显的事件相关电位P300,字符识别正确率也比对实验范式要高;同时也说明,增加了一个任务,虽然增大了难度,但是依然能提高受试者的注意力,改善了脑机接口系统性能。结合上述理论,我们设计并实现了基于主动心理任务的脑机接口系统在线字符拼写器,为脑机接口系统应用于日常生活创造了条件。
[Abstract]:This paper is based on the traditional P300 column flicker experimental paradigm and adds an active psychological task. In the first experiment, the active psychological task experiment is to distinguish color, and a contrast experiment is designed. In order to further verify that the active mental task experimental paradigm can improve the performance of the BCI system, we designed a second experiment, that is, the active psychological task experiment is counting plus discriminating color, and we also designed a contrast experiment, that is, counting. The results of the two experiments show that the active psychological task experiment can induce a more obvious event-related potential P300 than the contrast experiment, and the correct rate of character recognition is higher than that of the experimental paradigm. At the same time, it also shows that one task is added, although the difficulty is increased. But it can still improve the attention of the subjects and improve the performance of the BCI system. Based on the above theory, we design and implement the online character spelling device of the BCI system based on active psychological task, which creates the conditions for the BCI system to be applied in daily life.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R318;TN911.7
本文编号：2176971
[Abstract]:This paper is based on the traditional P300 column flicker experimental paradigm and adds an active psychological task. In the first experiment, the active psychological task experiment is to distinguish color, and a contrast experiment is designed. In order to further verify that the active mental task experimental paradigm can improve the performance of the BCI system, we designed a second experiment, that is, the active psychological task experiment is counting plus discriminating color, and we also designed a contrast experiment, that is, counting. The results of the two experiments show that the active psychological task experiment can induce a more obvious event-related potential P300 than the contrast experiment, and the correct rate of character recognition is higher than that of the experimental paradigm. At the same time, it also shows that one task is added, although the difficulty is increased. But it can still improve the attention of the subjects and improve the performance of the BCI system. Based on the above theory, we design and implement the online character spelling device of the BCI system based on active psychological task, which creates the conditions for the BCI system to be applied in daily life.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R318;TN911.7
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