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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Psychopharmacology (Berl). 2016 Jan 27;233(7):1245–1255. doi: 10.1007/s00213-016-4208-y

Fig. 3.

Fig. 3

Mean N2 amplitude values for each beverage group as a function of previous trial (a) and current trial (b) flanker compatibility. Vertical bars indicate standard error of the mean; asterisks indicate significant within-group mean differences, *p < .05; **p < .01. More positive amplitude values indicate smaller (less negative) N2 responses. AC = alcohol + caffeine; PC = placebo alcohol + caffeine; AP = alcohol + placebo caffeine; PP = placebo alcohol + placebo caffeine.