. 2015 Apr 21;3:e907. doi: 10.7717/peerj.907

Table 4. Neuroscan versus EPOC EEG system ERP peak comparisons: active listening.

Descriptive (n, M [lower, upper 95% confidence intervals]) and inferential (t or Z and Cohen’s d) statistics for peak (P1, N1, P2, N2) amplitude (µV) and latency (ms) measure at sites F3/AF3 and F4/AF4 for Neuroscan versus EPOC in the active condition.

					EEG system
Tone	ERP	Measure	Electrode	n	Neuroscan	EPOC	stat.	d
Standard	P1	Amplitude	F3/AF3	18	3.15 [2.3, 4.0]	3.33 [2.2, 4.5]	−0.68^a	0.09
			F4/AF4	18	3.15 [2.3, 4.0]	3.09 [1.9, 4.2]	−0.6^a	0.03
		Latency	F3/AF3	18	96 [88, 104]	102 [96, 108]	−3.06^a^,^**	0.43
			F4/AF4	18	94 [86, 102]	104 [97, 111]	−3.58^a^,^***	0.6
	N1	Amplitude	F3/AF3	5	−1.72 [−3.0, −0.4]	−1.89 [−3.2, −0.6]	1.09	0.14
			F4/AF4	5	−1.72 [−3.1, −0.4]	−2.24 [−3.8, −0.7]	2.43	0.38
		Latency	F3/AF3	5	120 [112, 128]	136 [121, 151]	−2.52	1.48
			F4/AF4	5	118 [110, 126]	136 [122, 150]	−3.36^*	1.73
	P2	Amplitude	F3/AF3	5	0.07 [−1.7, 1.8]	−0.08 [−1.6, 1.5]	0.62	0.09
			F4/AF4	5	0.54 [−2.0, 3.1]	−0.09 [−1.6, 1.5]	1.14	0.3
		Latency	F3/AF3	5	158 [133, 183]	167 [143, 191]	−3.2^*	0.4
			F4/AF4	5	167 [147, 187]	175 [159, 191]	−3.16^*	0.44
	N2	Amplitude	F3/AF3	18	−8.89 [−10.4, −7.4]	−7.93 [−9.6, −6.3]	−3.19^*	0.3
			F4/AF4	18	−8.29 [−9.6, −7.0]	−7.88 [−9.1, −6.6]	−1.34	0.15
		Latency	F3/AF3	18	247 [238, 256]	257 [247, 267]	−5.05^***	0.5
			F4/AF4	18	248 [234, 262]	259 [246, 272]	−1.48	0.39
Deviant	P1	Amplitude	F3/AF3	18	3.09 [1.5, 4.7]	3.07 [1.4, 4.8]	−0.3^a	0.01
			F4/AF4	18	3.07 [1.3, 4.8]	2.93 [1.1, 4.8]	−0.26^a	0.04
		Latency	F3/AF3	18	94 [85, 103]	101 [92, 110]	−3.55^**	0.39
			F4/AF4	18	93 [85, 101]	103 [95, 111]	−3.54^a^,^***	0.58
	N1	Amplitude	F3/AF3	4	−7.24 [−7.9, −6.6]	−6.83 [−9.0, −4.7]	−0.5	0.36
			F4/AF4	4	−5.90 [−7.4, −4.4]	−6.89 [−8.6, −5.2]	4.08^*	0.78
		Latency	F3/AF3	4	115 [97, 133]	127 [110, 144]	−5.2^*	0.82
			F4/AF4	4	125 [102, 148]	132 [110, 154]	−15.72^***	0.41
	P2	Amplitude	F3/AF3	4	−1.74 [−3.5, −0.0]	−2.39 [−4.0, −0.8]	0.71	0.48
			F4/AF4	4	−2.02 [−3.1, −1.0]	−2.21 [−4.7, 0.3]	0.17	0.13
		Latency	F3/AF3	4	165 [132, 198]	186 [156, 216]	−1.85	0.81
			F4/AF4	4	174 [143, 205]	180 [153, 207]	−1.38	0.26
	N2	Amplitude	F3/AF3	18	−11.51 [−13.8, −9.2]	−10.00 [−12.4, −7.6]	−2.62^*	0.31
			F4/AF4	18	−10.93 [−13.0, −8.9]	−10.68 [−12.8, −8.6]	−0.43	0.06
		Latency	F3/AF3	18	230 [213, 247]	236 [217, 255]	−1.9	0.17
			F4/AF4	18	236 [221, 251]	238 [220, 256]	−0.26	0.05

Notes.

Wilcoxon Z.

p < .05.

^**

p < .01.

^***

p < .001.