Table 2.

Accuracy rates of the P300 detection (online) and the spectral analysis (offline) for the subjects.

Subjects	Online accuracy (P300 detection)	p-value	Offline accuracy (spectral analysis)	p-value
P1	52	0.778	52	0.778
P2	78	<0.001	68	0.011
P3	68	0.011	66	0.047
P4	54	0.572	50	1.000
P5	56	0.396	48	0.778
P6	66	0.047	60	0.157
P7	50	1.000	54	0.572
P8	58	0.258	58	0.258
HC1	100	<0.001	90	<0.001
HC2	100	<0.001	76	<0.001
HC3	96	<0.001	90	<0.001
HC4	100	<0.001	76	<0.001
HC5	94	<0.001	70	0.005
HC6	78	<0.001	68	0.011
HC7	96	<0.001	76	<0.001
HC8	98	<0.001	82	<0.001

The accuracies significantly higher than the chance level 50% (accuracy ≥64% or p ≤ 0.05) are highlighted in bold.