Fig. 1.

Grand averaged event-related potential (ERP) waveforms at the C1, Cz, C2, CP1, CPz and CP2 electrodes for pleasant, neutral and drug images for individuals with cocaine use disorders (CUD) at (A) baseline and (B) 6-month follow-up and for (C) healthy controls at baseline. (D) Bar graphs of late positive potential (LPP) differentials between controls and treatment-seeking individuals with CUD for pleasant (relative to neutral), drug (relative to neutral) and the drug – pleasant direct contrast. *p < 0.05.