Planned contrasts showed that the CE in N2 amplitude was significantly smaller in alcohol group (M = 0.21 µV) compared to the average of the control and placebo groups (M = 1.5 µV), t(1969) = −5.79, p <.001, consistent with a pharmacological effect.. The N2 CE was significantly greater in the control group (M = 1.47 µV) compared to the average of the placebo and alcohol groups (M = 0.66µV), t(1969) = 2.57, p = .01, consistent with an expectancy effect.
