The effect of social housing (A) and OT (B) on breaking point (BP) for METH (0.06 mg/kg/inf).
A. BP +/− SEM *p<0.05, difference between Individually and Socially housed animals for that week.
B. BP +/− SEM OT treatment was initiated at the dashed line. There were no differences in the groups that received OT vs. Vehicle (VEH). *p<0.05, difference between individually housed and socially housed animals, #p<0.05, difference between VEH and OT within housing conditions,** p<0.05, different from week 5 during week 7, *** p<0.05, different from week 5 during weeks 6 & 7.