Table 2.

Mean peak latencies (ms) and amplitudes (microvolts), averaged across the 24 participants, for each stimulus condition as measured at electrode Fz.

Marker	Channel	Gap duration	P1		N1		P2
			Latency	Amplitude	Latitude	Amplitude	Latency	Amplitude
First	Within	Standard	58	0.9	109	−1.2	197	1.1
		Sub-threshold	59	1.0	115	−1.2	193	1.2
		GDT	58	1.0	113	−1.4	188	1.1
		Supra-threshold	60	0.9	109	−1.4	196	0.9
	Across	Standard	60	1.0	111	−1.3	201	1.2
		Sub-threshold	56	1.2	113	−1.2	194	1.2
		GDT	59	1.0	107	−1.2	189	1.1
		Supra-threshold	55	1.1	116	−1.5	201	1.4
Second	Within	Standard	65	−0.1	111	−0.7	188	0.2
		Sub-threshold	65	0.2	113	−0.6	189	0.4
		GDT	55	0.3	107	−0.9	186	0.3
		Supra-threshold	50	0.4	115	−0.8	193	0.5
	Across	Standard	59	0.7	114	−1.5	194	0.7
		Sub-threshold	58	0.8	112	−1.4	190	0.7
		GDT	55	1.0	118	−1.4	197	0.9
		Supra-threshold	54	1.4	117	−1.6	198	1.0