Comparison of the BCI Performance between the Semitransparent Face Pattern and the Traditional Face Pattern

Table 2

Online classification accuracy, bit rate, and average number of trials for each subject.

		S1	S2	S3	S4	S5	S6	S7	S8	S9	S10	AVG ± STD
ACC (%)	F-P	94.4	94.4	91.7	94.4	80.5	100	94.4	77.8	91.7	100	91.9 ± 7.3
	STF-P	97.2	94.4	97.2	100	88.9	97.2	97.2	83.3	94.4	100	95.0 ± 5.2
RBR (bit/min)	F-P	32.9	42.7	36.3	44.5	32.3	44.3	43.9	29.4	28.6	44.8	38.0 ± 6.7
	STF-P	41.0	44.5	43.0	50.3	39.3	43.0	42.5	36.1	36.6	49.6	42.6 ± 4.8
AVT	F-P	2.78	2.14	2.39	2.06	2.14	2.33	2.08	2.22	3.03	2.31	2.35 ± 0.32
	STF-P	2.36	2.06	2.25	2.06	2.08	2.25	2.28	2.03	2.50	2.08	2.20 ± 0.16

ACC = classification accuracy, RBR = raw bit rate (bit/min), AVT = average number of trials used to classify each character, STF-P = semitransparent face pattern, F-P = face pattern, AVG = average, and STD = standard deviation.