Table 2.

Mean Amplitude (µV) of the N2 and FSW by Group, Previous or 2-back Trial Accuracy, and Current Trial Compatibility

		Current trial
		N2			FSW
	Previous trial accuracy	Comp	Incomp	t	Comp	Incomp	t
Control
	Correct	1.48	0.47	3.78**	−2.10	−2.70	1.66
		2.27	2.59		2.59	2.55
	Incorrect	2.29	0.82	5.48**	−0.29	0.51	−2.25*
		3.28	3.43		4.27	4.12
Placebo
	Correct	1.87	0.87	4.25**	−1.33	−2.14	2.58**
		3.73	3.87		2.94	3.13
	Incorrect	1.97	0.45	6.48**	−0.16	−1.86	5.44**
		4.46	5.05		3.74	5.44
Alcohol
	Correct	0.34	−0.66	4.25**	−1.29	−2.14	2.73**
		2.28	2.54		2.78	3.01
	Incorrect	0.47	0.68	−0.91	0.74	1.09	−1.11
		3.06	3.91		4.60	4.54
	Two-back trial accuracy	Comp	Incomp	t	Comp	Incomp	t
Control
	Correct	1.45	0.46	3.59**	−2.18	−2.74	1.64
		2.31	2.61		2.57	2.60
	Incorrect	1.30	0.21	3.94**	−0.83	−2.96	6.21**
		2.65	2.96		5.61	4.71
Placebo
	Correct	1.85	0.86	4.06**	−1.34	−2.10	2.46**
		3.70	3.90		2.39	2.71
	Incorrect	1.42	0.57	3.41**	−0.04	−1.31	4.06**
		5.78	4.87		3.59	4.69
Alcohol
	Correct	0.24	−0.72	3.94**	−1.41	−2.25	2.79**
		2.35	2.58		2.73	2.98
	Incorrect	0.90	−0.30	4.92**	0.74	−0.78	5.07**
		3.82	3.65		4.68	4.36

Note. Comp = compatible arrays; Incomp = incompatible arrays. Italicized numbers are standard deviations. Columns labeled “t” provide values of t-tests comparing compatible versus incompatible means for each condition.

^*p < .05;

^**p < .01.