Responses on the previously active (panel A) and inactive (panel B) levers are shown for the 5S (left side of each panel; n = 14) and 10E (right side of each panel; n = 10) groups of animals that were pretreated with ALLO (3.2, 5.6, 10 and 17 mg/kg, IP) at 15 min prior to extinction session onset. Baseline (0 mg/kg, VEH) responding represents the collapsed average of the extinction sessions following VEH injection that immediately preceded each test session with ALLO.
*P < 0.05, **P < 0.01 versus within-subject baseline