Table 2.

SO densities for sample channels

Channel	Stage	Night 1	Night 2	t(23)	P
Afz	N3	7.1 ± 6.0	7.6 ± 6.8	−0.5	0.64
	N2	1.5 ± 1.1	1.5 ± 1.1	−0.2	0.84
FCz	N3	2.8 ± 2.6	2.4 ± 2.2	0.7	0.51
	N2	0.5 ± 0.5	0.5 ± 0.5	0.2	0.84
CPz	N3	4.1 ± 4.1	3.1 ± 3.0	1.3	0.22
	N2	0.4 ± 0.4	0.4 ± 0.5	−0.2	0.88
POz	N3	0.6 ± 1.0	0.7 ± 1.2	−0.4	0.70
	N2	0.1 ± 0.1	0.1 ± 0.2	−0.9	0.39
C6	N3	2.0 ± 2.1	1.5 ± 2.2	0.9	0.38
	N2	0.3 ± 0.5	0.2 ± 0.4	1.1	0.26

SO densities (mean ± SD) in both nights and statistical results from paired t-tests.