Fig. 3

Frontloading patterns. Active lever presses per bin (as a percent of total active lever presses) and ethanol consumption per bin (g/kg) in males and females in the FR1 30 min (A, B), FR3 30 min (C, D), and FR3 15 min (E, F) schedules. Inset: cumulative percent pressing completed in the first five bins (a, c, e) and cumulative ethanol consumption (g/kg) achieved in the first five bins (B, E, F). * p < .05, ** p < .01, *** p < .001. & indicates a male score significantly greater than female score and # a female score significantly greater than a male score as determined by post-hoc testing to follow up on a sex by bin interaction. All data expressed are mean ± SEM taken from the final four days of testing at each schedule.