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. 2017 Sep 6;11(6):501–513. doi: 10.1007/s11571-017-9452-2

Table 2.

Results of online experiments

M^a	Experiment I
	(1) Symbols		(2) Numbers		(3) Alphabets
	‘+’	‘−’	‘2’	‘4’	‘A’	‘M’
CR^b	0.7750 (0.0672)	0.7850 (0.0650)	0.7760 (0.0854)	0.7550 (0.0432)	0.7652 (0.0560)	0.7410 (0.0230)
T^c (s)	0.5576 (0.0040)	0.5872 (0.0032)	0.5659 (0.0072)	0.5988 (0.0025)	0.5160 (0.0065)	0.5875 (0.0450)

M	Experiment II
	(1) Symbols				(2) Numbers				(3) Alphabets
	‘+’	‘−’	‘×’	‘÷’	‘2’	‘4’	‘5’	‘8’	‘A’	‘E’	‘K’	‘M’
CR	0.7060 (0.0305)	0.7232 (0.0610)	0.7465 (0.0750)	0.7035 (0.0345)	0.7022 (0.0260)	0.7570 (0.0450)	0.7610 (0.0632)	0.7060 (0.0532)	0.7435 (0.0260)	0.6850 (0.0450)	0.7225 (0.0250)	0.7212 (0.0620)
T (s)	0.9788 (0.0030)	0.9664 (0.0050)	0.9545 (0.0028)	0.9971 (0.0052)	1.5245 (0.0036)	1.5574 (0.0078)	1.5781 (0.0056)	1.5654 (0.0036)	1.5832 (0.0020)	1.5543 (0.0042)	1.5871 (0.0026)	1.5882 (0.0038)

M	Experiment III
	Symbols + numbers + alphabets
	‘+’	‘−’	‘5’	‘8’	‘A’	‘E’
CR	0.6875 (0.0532)	0.7040 (0.0564)	0.6575 (0.0750)	0.6225 (0.0800)	0.6812 (0.0612)	0.7045 (0.0854)
T (s)	1.9781 (0.0087)	1.8991 (0.0102)	1.9112 (0.0075)	1.9891 (0.0060)	1.9882 (0.0082)	1.8978 (0.0072)

^aMetric

^bCorrect rate

^cComputation Time per sample in seconds