Drug Effects on ERP peaks.
N170 – Face processing. (Figure 2). MDMA significantly increased N170 peak amplitude compared to PLC specifically for Happy (MDMA/PLC; M=-2.27µV/M=-1.04 µV) and Angry (MDMA/PLC; M=-2.09µV /M=-1.31µV) faces (significant Drug x Emotion interaction, F(2,86)= 4.49, p=.01 , ηp2=0.1). Regardless of whether participants received MDMA or PLC, the N170 amplitude was also greater with Happy and Angry faces compared to Neutral faces (main effect of Emotion F(2,88)= 7.86, p=.001 , ηp2=0.15). MA did not affect the N170 peak amplitude, compared to PLC (no significant interaction between Drug and Emotion, F(2,86)= 0.31, p>.05 , ηp2=0.007). In this MA vs PLC analysis, Emotion did not affect peak N170 amplitude here (no main effect of Emotion, F(2,86)= 1.21, p>.05 , ηp2=0.03).