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Concurrent mental activities affect ERPs and impair performance of ERP-spellers

机译：并发精神活动影响ERP拼写的ERP和损害表现

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Being one of the most popular and extensively studied ERP-BCI paradigm, ERP-spellers are commonly built and tested in ideal lab settings. However, in practical applications, users may encounter complex situations and various mental processing that have been believed to affect ERP signals. This kind of effect will probably induce a deteriorated performance of ERP-spellers. In the current study, a working memory task was interleaved within an RC ERP-speller paradigm to examine the effect of concurrent mental processing both on ERPs evoked by the stimuli of speller and its performance, especially when a speller is built under pure lab setting but used under complex mental activities in real life. The results show that the amplitude of N200, P360 and N550 were significantly affected by the working memory task. Moreover, the performance of ERP-spellers was significantly deteriorated by concurrently performing a working memory task, not only when a speller is trained and used in different settings, but also when a speller is both built and used in the same complex setting. These findings introduce a challenge for ERP-spellers to be used outside lab-settings and in daily work, especially when users are undergoing complex mental processing and experiencing heavy mental workload.
机译：作为最受欢迎和广泛研究的ERP-BCI范例之一，ERP拼写通常在理想的实验室设置中进行常用和测试。然而，在实际应用中，用户可能会遇到复杂的情况和各种心理处理，以为ERP信号影响。这种效果可能会导致ERP拼写的劣化性能。在目前的研究中，工作内存任务在RC ERP-Speller范例中交错，以检查并发心理处理对由拼写器的刺激和其性能引起的ERPS的效果，特别是当拼写在纯粹的实验室设置下构建但是在现实生活中根据复杂的心理活动使用。结果表明，N200，P360和N550的幅度受工作存储器任务的显着影响。此外，通过同时执行工作存储器任务，ERP拼写的性能非常恶化，而不仅仅是在不同的设置中培训并使用拼写器时，而且当拼写器都在相同的复杂设置中建立和使用时。这些发现引入了ERP拼写的挑战，以便在实验室设置和日常工作中使用，特别是当用户正在进行复杂的心理处理和体验沉重的心理工作量时。

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