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BCI with Intuitive Object Control Based on Code-Modulated Visual Evoked Potentials
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DOI：10.1007/978-3-032-02728-3_46.png)
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Abstract
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In recent years, brain-computer interface (BCI) research has rapidly evolved. The current primary focus of the field is to improve the speed, accuracy and overall performance of the system, however, slowly the focus is shifting to taking applications out of the laboratory environment and into the real world. Some of these solutions involve using augmented reality (AR) or virtual reality (VR), allowing for a stimulation that is incorporated into the real world. Most of these AR or VR studies, however, often still use the generic box-like stimuli, usually describing with text or icons what action the user can execute. To create a more intuitive control option, this study investigated the feasibility of stimulation of the objects themselves. This stimulation approach has the additional benefit that the visual field is not obstructed by added stimuli. This online pilot study presented the stimuli on a monitor to test the feasibility of stimulating the objects. Specifically, the stimulation is done by flickering the objects between dark and bright states. All stimuli had different sizes, shapes and colours, to account for a real-life environment. We studied the accuracy, speed, and subjective user experience and compared those between flashing the objects and flashing the box-stimuli with text descriptions. We found that the condition in which the generic boxes with text were used was more accurate, reliable and faster than the condition in which the objects themselves were flickering. In terms of user experience, no statistical differences were found between the two conditions.
Keywords:
code-modulated visual evoked potential (c-VEP)
brain-computer interface (BCI)
EEG
integrated control
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