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

Table 1

Comparison of online classification accuracies between the PRCS and GSS.

Group	Participant	PRCS accuracy (%)	GSS accuracy (%)
Group 1	P6	84.5	58.8
	P8	92.3	85.7
	P10	98.4	92.3
Group 2	P2	100	100
	P3	66.7	98.4
	P5	96.8	76.9
	P7	100	98.4
	P11	89.6	98.4
	P12	80.0	80.0
	P13	84.5	95.2
Group 3	P1	70.6	89.6
	P4	84.5	90.9
	P9	75.9	92.3
	P14	83.3	96.8
Average ± std.		86.2 ± 10.7	89.6 ± 11.3

Group 1 includes participants who rated PRCS as more comfortable to their eyes than GSS. Group 2 includes participants who rated GSS as more comfortable than PRCS. The remaining participants who gave the same score to both stimuli are categorized as Group 3.