A comparison between a matrix-based and a region-based P300 speller paradigms for brain-computer interface
A comparison between a matrix-based and a region-based P300 speller paradigms for brain-computer interface
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DOI：
10.1109/iembs.2008.4649364
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发表时间：
2008-10
期刊：
影响因子：
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通讯作者：
R. Fazel-Rezai;Kamyar Abhari
中科院分区：
文献类型：
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作者：
R. Fazel-Rezai;Kamyar Abhari
脑机接口（BCI）是一种将信息和命令直接从人脑传递到计算机的系统。本文所描述的脑机接口系统是基于P300波的。P300是事件相关电位（ERP）的正峰，发生在刺激后300 ms。P300最著名和最广泛使用的应用之一是由Farwell-Donchin于1988年设计的P300拼写器。Farwell-Donchin范式已经成为P300 BCI的基准。在这个范例中，显示一个6x6的字母和数字矩阵，主体聚焦在目标字符上，同时字符的行和列闪烁。通过检测一行和一列的P300，可以识别目标字符。本文证明了在Farwell-Donchin范式中存在着人的知觉误差。为了消除这个错误，一个新的区域为基础的范例。实验结果表明，该方法具有多方面的优点，与Farwell-Donchin方法相比，具有更高的精度.
A brain-computer interface (BCI) is a system that conveys messages and commands directly from the human brain to a computer. The BCI system described in this work is based on P300 wave. The P300 is a positive peak of an event-related potential (ERP) that happens 300 ms after a stimulus. One of the most well-known and widely-used P300 applications is P300 speller designed by Farwell-Donchin in 1988. The Farwell-Donchin paradigm has been a benchmark in P300 BCI. In this paradigm, a 6x6 matrix of letters and numbers is displayed and subject focuses on a target character while rows and columns of characters flash. By detecting P300 for one row and one column, the target character can be identified. In this paper, it is shown that there is a human perceptual error in Farwell-Donchin paradigm. To remove this error, a new region-based paradigm is presented. Using experimental results, it is shown that the new paradigm has several advantages and it achieves a better accuracy compared to the Farwell-Donchin paradigm.