Xue Jiguo, Quan Cheng, Li Chunyong, Yue Jingwei, Zhang Chenggang
Department of Neurobiology, Beijing Institute of Radiation Medicine, State Key Laboratory of Proteomics, Cognitive and Mental Health Research Center, Beijing, China.
Medicine (Baltimore). 2017 Mar;96(13):e6444. doi: 10.1097/MD.0000000000006444.
Eye tracking and event-related potentials have been widely used in the field of cognitive psychology and neuroscience. Both techniques have the ability to refine cognitive models through a precise timeline description; nevertheless, they also have severe limitations. Combining measures of event-related potentials and eye movements can contribute to cognitive process capture, which provides the possibility to determine precisely when and in which order different cognitive operations occur. Combining of event-related potentials and eye movements has been recently conducted by synchronizing measures from an infrared eye tracker with an electroencephalograph to allow simultaneous data recording. Here, we describe in detail 4 types of co-registration methods for event-related potentials and eye movements on the Tobii platform. Moreover, the present investigation was designed to evaluate the temporal accuracy of data obtained using the 4 methods. We found that the method based on the Tobii Pro Analytics software development kit had a higher degree of temporal accuracy than the other co-registration methods. Furthermore, the reasons for the different temporal accuracies were assessed, and potential measures to correct clock drift were taken. General suggestions are made regarding timing in the co-registration of the electroencephalograph and eye tracker.
眼动追踪和事件相关电位已在认知心理学和神经科学领域中得到广泛应用。这两种技术都能够通过精确的时间线描述来完善认知模型；然而，它们也存在严重的局限性。将事件相关电位和眼动测量相结合有助于捕捉认知过程，这为精确确定不同认知操作何时以及按何种顺序发生提供了可能性。最近，通过将来自红外眼动仪的测量与脑电图仪同步，实现了事件相关电位和眼动的结合，从而能够同时记录数据。在此，我们详细描述了Tobii平台上事件相关电位和眼动的4种共配准方法。此外，本研究旨在评估使用这4种方法获得的数据的时间准确性。我们发现，基于Tobii Pro Analytics软件开发工具包的方法比其他共配准方法具有更高的时间准确性。此外，我们评估了不同时间准确性的原因，并采取了纠正时钟漂移的潜在措施。针对脑电图仪和眼动仪共配准中的时间问题提出了一般性建议。
