Furdea A, Halder S, Krusienski D J, Bross D, Nijboer F, Birbaumer N, Kübler A
Institute of Medical Psychology and Behavioural Neurobiology, University of Tübingen, Germany.
Psychophysiology. 2009 May;46(3):617-25. doi: 10.1111/j.1469-8986.2008.00783.x. Epub 2009 Jan 26.
This study was designed to develop and test an auditory event-related potential (ERP) based spelling system for a brain-computer interface (BCI) and to compare user's performance between the auditory and visual modality. The spelling system, where letters in a matrix were coded with acoustically presented numbers, was tested on a group of healthy volunteers. The results were compared with a visual spelling system. Nine of the 13 participants presented with the auditory ERP spelling system scored above a predefined criterion level control for communication. Compared to the visual spelling system, users' performance was lower and the peak latencies of the auditorily evoked ERPs were delayed. It was concluded that auditorily evoked ERPs from the majority of the users could be reliably classified. High accuracies were achieved in these users, rendering item selection with a BCI based on auditory stimulation feasible for communication.
本研究旨在开发并测试一种用于脑机接口（BCI）的基于听觉事件相关电位（ERP）的拼写系统，并比较用户在听觉和视觉模式下的表现。该拼写系统通过声音呈现的数字对矩阵中的字母进行编码，在一组健康志愿者身上进行了测试。结果与视觉拼写系统进行了比较。在使用听觉ERP拼写系统的13名参与者中，有9名的得分高于预先定义的用于交流的标准控制水平。与视觉拼写系统相比，用户的表现较低，听觉诱发ERP的峰值潜伏期延迟。研究得出结论，大多数用户的听觉诱发ERP能够被可靠地分类。这些用户取得了较高的准确率，使得基于听觉刺激的BCI项目选择用于交流成为可行。
