基于主動心理任務的腦機接口系統(tǒng)研究
發(fā)布時間：2018-08-11 12:18
【摘要】：本文是在傳統(tǒng)P300行列閃爍實驗范式的基礎上進行改進,同時增加了一個主動心理任務。第一個實驗中,主動心理任務實驗是判別顏色,同時設計了對比實驗即計數(shù)。為了進一步驗證主動心理任務實驗范式能提高腦機接口系統(tǒng)性能,我們設計了第二個實驗,即主動心理任務實驗是計數(shù)加判別顏色,同時設計了對比實驗即計數(shù)。兩個實驗結果說明,主動心理任務實驗比對比實驗能誘發(fā)出更明顯的事件相關電位P300,字符識別正確率也比對實驗范式要高;同時也說明,增加了一個任務,雖然增大了難度,但是依然能提高受試者的注意力,改善了腦機接口系統(tǒng)性能。結合上述理論,我們設計并實現(xiàn)了基于主動心理任務的腦機接口系統(tǒng)在線字符拼寫器,為腦機接口系統(tǒng)應用于日常生活創(chuàng)造了條件。
[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.
【學位授予單位】：長春理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：R318;TN911.7
本文編號：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.
【學位授予單位】：長春理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：R318;TN911.7
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