Table 4.

Mean (±SE) MFN amplitudes collapsed across the 9 sites from the ANOVA for post-correct and post-error trials under compatible- and incompatible-response conditions.

	Compatible	Incompatible	Grand Mean
Young Adults (N=16)
Post Correct	3.5 (0.9)	3.4 (0.8)	3.4 (0.8)
Post Error	2.4 (0.8)	0.7 (0.9)	1.6 (0.7)
Grand Mean	2.9 (0.8)	2.0 (0.8)
Older Adults (N=14)
Post Correct	5.2 (0.9)	3.6 (0.8)	4.4 (0.9)
Post Error	1.7 (0.9)	−0.8 (1.0)	0.5 (0.8)
Grand Mean	3.5 (0.8)	1.4 (0.8)
Children (N=15)
Post Correct	4.7 (0.9)	4.5 (0.8)	4.6 (0.8)
Post Error	2.4 (0.9)	2.3 (1.0)	2.4 (0.8)
Grand Mean	3.5 (0.8)	3.4 (0.8)