Effect of the AcbC lesion on lever-press switching, performance, and pausing. (A) Mean (±SEM) switching probabilities of lever presses between the AcbC-lesioned rats and shams over session blocks. Asterisks indicate a significant simple main effect of group (p < 0.01). (B) Comparison of switching between the same and different conditions. (C) Mean (±SEM) number of lever presses performed by the AcbC-lesioned and the shams over session blocks. (D) Number of pellets earned by each group in each session. (E) Post-reinforcement pausing between the AcbC group and shams. Data are expressed as mean (±SEM) pausing time in each session block.