Towards a truly mobile auditory brain-computer interface: Exploring the P300 to take away
Towards a truly mobile auditory brain-computer interface: Exploring the P300 to take away
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DOI：
10.1016/j.ijpsycho.2013.08.010
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发表时间：
2014-01-01
影响因子：
3
通讯作者：
Debener, Stefan
中科院分区：
文献类型：
--
作者：
De Vos, Maarten;Gandras, Katharina;Debener, Stefan
在先前的研究中，我们提出了一种适用于现场记录的低成本、小型和无线14通道EEG系统（Debener等人，2012年，心理生理学）。在目前的后续研究中，我们调查了是否可以可靠地测量单次试验P300反应与此系统，而受试者自由地走在户外。20名健康受试者进行了三级听觉oddball任务，其中包括罕见的目标和非目标干扰刺激提出了16%的概率相等。数据记录在一个坐着（控制条件）和步行条件下，这两个都是在户外实现的。与分心物相比，目标的P300事件相关电位幅度明显更大（p <0.001），但与记录条件没有显著的相互作用。P300单次试验分析采用正则化逐步线性判别分析，显示大多数参与者的分类准确率高于机会水平（19/20为坐姿，16/20为步行条件），平均分类准确率为71%（坐姿）和64%（步行）。此外，所得到的信息传输率为坐着和步行的条件下是可比的，最近发表的实验室听觉脑机接口（BC！）study.这使我们得出结论，一个真正的移动的听觉BCI系统是可行的。(C)2013爱思唯尔有限公司版权所有。
In a previous study we presented a low-cost, small, and wireless 14-channel EEG system suitable for field recordings (Debener et al., 2012, psychophysiology). In the present follow-up study we investigated whether a single-trial P300 response can be reliably measured with this system, while subjects freely walk outdoors. Twenty healthy participants performed a three-class auditory oddball task, which included rare target and non-target distractor stimuli presented with equal probabilities of 16%. Data were recorded in a seated (control condition) and in a walking condition, both of which were realized outdoors. A significantly larger P300 event-related potential amplitude was evident for targets compared to distractors (p < .001), but no significant interaction with recording condition emerged. P300 single-trial analysis was performed with regularized stepwise linear discriminant analysis and revealed above chance-level classification accuracies for most participants (19 out of 20 for the seated, 16 out of 20 for the walking condition), with mean classification accuracies of 71% (seated) and 64% (walking). Moreover, the resulting information transfer rates for the seated and walking conditions were comparable to a recently published laboratory auditory brain-computer interface (BC!) study. This leads us to conclude that a truly mobile auditory BCI system is feasible. (C) 2013 Elsevier B.V. All rights reserved.