Table 3.

Kolmogorov–Smirnov test. Statistics and p-value (statistically significant differences) for the distributions of EEG-data corresponding to different words in silent speech.

Word:	‘backward’	‘up’	‘down’	pseudo	‘help’	‘take’	‘stop’	‘release’
‘forward’
Component ${}^{*}$	3	1	1	2	2	2	2	2
Statistics	0.046	0.047	0.023	0.117	0.161	0.125	0.175	0.137
p-value	0.0109	0.009	0.0027	$3.54\times {10}^{-14}$	$1.86\times {10}^{-23}$	$1.54\times {10}^{-14}$	$1.29\times {10}^{-14}$	$3.54\times {10}^{-14}$
‘backward’
Component ${}^{*}$		1	3	2	2	2	2	2
Statistics		0.056	0.059	0.059	0.167	0.13	0.155	0.14
p-value		0.0006	0.0003	$2.54\times {10}^{-14}$	$1.02\times {10}^{-26}$	$4.18\times {10}^{-17}$	$9.26\times {10}^{-25}$	$2.6\times {10}^{-14}$
‘up’
Component ${}^{*}$			2	2	2	2	2	2
Statistics			0.0269	0.14	0.142	0.104	0.144	0.12
p-value			0.00015	$9.11\times {10}^{-21}$	$2.19\times {10}^{-19}$	$3.89\times {10}^{-11}$	$2.54\times {10}^{-14}$	$9.1\times {10}^{-14}$
‘down’
Component ${}^{*}$				2	2	2	2	2
Statistics				0.128	0.147	0.114	0.156	0.126
p-value				$9.24\times {10}^{-17}$	$6.18\times {10}^{-20}$	$7.31\times {10}^{-13}$	$2\times {10}^{-15}$	$3.54\times {10}^{-14}$
pseudo
Component ${}^{*}$					2	2	2	2
Statistics					0.242	0.233	0.27	0.23
p-value					$2.54\times {10}^{-14}$	$1.47\times {10}^{-51}$	$3.11\times {10}^{-71}$	$1.27\times {10}^{-46}$
‘help’
Component ${}^{*}$						3	1	3
Statistics						0.063	0.052	0.095
p-value						0.001	0.0096	$2.27\times {10}^{-7}$
‘take’
Component ${}^{*}$							2	3
Statistics							0.054	0.074
p-value							0.0057	$8.48\times {10}^{-5}$
‘stop’
Component ${}^{*}$								3
Statistics								0.074
p-value								$7.67\times {10}^{-5}$

${}^{*}$—Number of the component where the statistical test is most convincing.