Table 1.

Group-average (N = 25) central (Cz) ORN (top) and parietal (Pz) P400 amplitudes and peak latencies (bottom) of the figure-minus-control difference waveforms, separately for the six stimulus conditions

	Coherence 4			Coherence 6
ORN	Duration 3	Duration 4	Duration 5	Duration 3	Duration 4	Duration 5
Mean amplitude at Cz (μV)	−0.37	−0.86	−1.17	−1.30	−1.70	−2.85
SD	1.22	1.72	1.42	1.58	1.90	2.03
t(24)	−1.48	−2.44*	−4.04***	−4.03***	−4.38***	−6.87***
Amplitude measurement window (ms)	200–300	200–300	232–332	172–272	200–300	232–332
ORN peak latency	258.08	263.04	272.16	242.40	268.80	273.28
SD	5.61	6.37	6.02	4.76	5.05	6.34
P400
Mean amplitude at Pz (μV)	0.33	1.60	4.08	1.58	4.35	6.79
SD	1.39	2.04	2.76	1.72	2.93	4.05
t(24)	1.16	3.84***	7.23***	4.48***	7.27***	8.23***
Amplitude measurement window (ms)	452–552	520–620	580–680	500–600	480–580	480–580
P400 peak latency	554.08	561.92	556.32	542.24	545.12	536.80
SD	8.14	6.09	7.46	6.61	7.48	6.99

Notes: Significant differences from zero are marked by asterisks (* p<.05,***p<.001)