The repeated measures analysis of variance indicated the condition main effect was significant for amplitude, F(1, 85) = 8.90, p = .004, ηp2 = .10, 1-β = .84. A pairwise comparison indicated that the non-reward condition had a more negative amplitude than the reward condition, mean difference = −.71, SE = .22. A significant Sex effect, F(1, 85) = 5.40, p = .02, ηp2 = .06, 1-β = .63 indicated that males had a more negative amplitude than females, mean difference = −1.99, SE = .86. The Age Group effect was also significant, F(2, 85) = 3.86, p = .03, ηp2= .08, 1-β = .68.
