Figure 2.
Impact of sex on cocaine choice during discrete trials under ad libitum feeding, equivalent food reinforcement value, and 10-min inter-trial interval conditions. (a) Percent cocaine choice during discrete trials with two-pellet reinforcement for both male and female; females choose cocaine significantly more than males. (b) Percent cocaine choice during discrete trials with ad libitum home-cage feeding, females choose cocaine significantly more than males. (c) Percent cocaine choice during discrete trials with 10-min inter-trial intervals, females choose cocaine significantly more than males. *Significant effect of sex, p<0.05.