Computational Intelligence and Neuroscience / 2019 / Article / Fig 1

Research Article

Comparison of Visual Stimuli for Steady-State Visual Evoked Potential-Based Brain-Computer Interfaces in Virtual Reality Environment in terms of Classification Accuracy and Visual Comfort

Figure 1

(a) Overall timeline for a single trial in offline experiments. In each trial, after a 2 s instruction period to inform participants of the location of a target visual stimulus, four visual stimuli, each of which was either PRCS or GSS, were presented for 4 s. (b) Screenshots of online experiments. The left picture was taken when the PRCS was employed, while the right picture was taken when the GSS was employed. The human avatar needed to move along a designated path (e.g., in the left direction in both figures).

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