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首页> 外文会议>Engineering in Medicine and Biology Society, 2004. IEMBS '04. 26th Annual International Conference of the IEEE >A comparison of covert and overt attention as a control option in a steady-state visual evoked potential-based brain computer interface
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A comparison of covert and overt attention as a control option in a steady-state visual evoked potential-based brain computer interface

机译：隐性和显性注意力作为稳态视觉诱发电位基于脑的计算机界面中的控制选项的比较

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摘要

EEG data were recorded from occipital scalp regions of subjects who attended to an alternating checkerboard stimulus in one visual field while ignoring a similar stimulus of a different frequency in the opposite visual field. Classification of left/right spatial attention is attempted by extracting steady-state visual evoked potentials (SSVEPs) elicited by the stimuli to assess the potential use of such a spatial selective attention paradigm in a brain computer interface (BCI). Experimental setup and analysis procedure in a previous study in which eye movement is permitted are replicated in order to quantify differences in classification performance using overt and covert attention. Four variations of the basic paradigm, involving both feedback and addition of extra mental load, are studied for comparison. The average accuracy is found to be reduced by ∼20% in the switch from overt to covert attention when no other specifications of the task are changed.
机译：从一个视野中参加交替棋盘刺激的受试者的枕头头皮区域记录EEG数据，同时在相对的视野中忽略不同频率的类似刺激。通过提取刺激引发的稳态视觉诱发电位（SSVEPS）来试图对左/右空间注意的分类来评估这种空间选择性关注范例（BCI）中的潜在使用这种空间选择性关注范例。在先前的研究中进行实验设置和分析程序，其中允许眼睛移动，以便使用公开和隐蔽的注意力来量化分类性能的差异。研究了基本范式的四种变化，涉及反馈和添加额外心理载荷，以进行比较。当没有改变其他规格的任务时，从公开到暗示的交换机中的平均精度会减少〜20％。

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