Table 1. Mean values (and inter-participant standard deviations) from our dependent measures of interest and omnibus ANOVA results.

Onset/Offset data are in milliseconds. M2 peak values are in millivolts. Epoch data are normalized to each participant’s mean integrated M1 values (normalized units).

	Condition				Omnibus Test
	Short Foreperiod		Long Foreperiod		Foreperiod				Intentional Set				Foreperiod × Set
	DNI	ACT	DNI	ACT	df	F	p	${\mathit{\eta }}_{\mathit{p}}^{\mathbf{2}}$	df	F	p	${\mathit{\eta }}_{\mathit{p}}^{\mathbf{2}}$	df	F	p	${\mathit{\eta }}_{\mathit{p}}^{\mathbf{2}}$
M1 Onset (ms)	27.6 (2.4)	27.3 (2.2)	27.7 (2.9)	27.4 (2.5)	1, 14	0.07	.79	< .01	1, 14	3.15	.098	.18	1, 14	0.01	.96	< .01
M2 Onset (ms)	49.8 (3.2)	50.0 (3.3)	49.7 (3.8)	49.5 (3.2)	1, 14	0.76	.40	.05	1, 14	0.01	.96	< .01	1, 14	0.57	.46	.04
M2 Offset (ms)	93.4 (7.4)	-	97.7 (6.8)	-	14	t 5.03	< .001	-	-	-	-	-	-	-	-	-
M1 Peak (mV)	0.18 (0.10)	0.19 (0.11)	0.16 (0.08)	0.17 (0.09)	1, 14	2.64	.13	.16	1, 14	2.15	.16	.13	1, 14	0.07	.80	< .01
M2 Peak (mV)	0.48 (0.27)	0.71 (0.38)	0.51 (0.24)	0.72 (0.39)	1, 14	0.46	.51	.03	1, 14	17.90	.001	.56	1, 14	0.33	.58	.02
Baseline Epoch (NU)	0.32 (0.15)	0.31 (0.14)	0.29 (0.14)	0.31 (0.15)	1, 14	0.61	.45	.04	1, 14	0.03	.88	< .01	1, 14	4.11	.062	.23
M1 Epoch (NU)	1.01 (0.13)	1.08 (0.15)	0.92 (0.15)	0.98 (0.16)	1, 14	2.00	.18	.13	1, 14	3.25	.093	.19	1, 14	0.01	.91	< .01
M2a Epoch (NU)	2.90 (1.73)	3.48 (2.01)	2.81 (1.09)	3.51 (1.82)	1, 14	0.13	.91	< .01	1, 14	10.14	.007	.42	1, 14	0.48	.50	.03
M2b Epoch (NU)	1.89 (1.50)	4.50 (3.06)	2.36 (1.82)	4.55 (3.34)	1, 14	1.70	.21	.11	1, 14	20.38	< .001	.59	1, 14	6.68	.022	.32