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. Author manuscript; available in PMC: 2016 Aug 21.
Published in final edited form as: Pharmacol Biochem Behav. 2015 Feb 21;132:1–9. doi: 10.1016/j.pbb.2015.02.014

Fig. 4.

Fig. 4

Ethanol self-administration under a fixed ratio 1 schedule of reinforcement. (A) Data are plotted as mean (± SEM) daily ethanol consumption (g/kg) for each daily testing session. (B) Data are plotted as mean (± SEM) daily ethanol consumption (g/kg) for blocks of 10 days each. (C) Data are plotted as the mean (± SEM) ethanol preference of all 60 days of FR1 ethanol consumption. An asterisk (*) represents a significant difference between males (n=23) and females (n=23; p<0.05).