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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. 1.

Fig. 1

Mean untransformed accuracy (a) and response time (c) by beverage group, previous trial compatibility, and current trial compatibility. PC = post-compatible; PI = post-incompatible. Accuracy compatibility effects as a function of previous trial compatibility, separately for each beverage group (b). More negative values represent larger compatibility effects, corresponding to more interference from incompatible flanker stimuli. Response time compatibility effects as a function of previous trial compatibility, separately for each beverage group (d). Larger (more positive) values represent larger compatibility effects, corresponding to more interference from incompatible (relative to compatible) flanker stimuli. Error bars represent standard error of the mean; asterisks indicate significant within-group mean differences, p < .05. AC = alcohol + caffeine; PC = placebo alcohol + caffeine; AP = alcohol + placebo caffeine; PP = placebo alcohol + placebo caffeine.