Fig. 2

MS SHR displayed preference for the methamphetamine-paired compartment. *The difference in time spent in the non-preferred/methamphetamine-paired compartment between the third day of preconditioning and the probe trial was greater in MS SHR than nMS SHR and MS SD (p < 0.05, Tukey post hoc test). ^WKY displayed a stronger initial preference for the preferred compartment than both SHR and SD (p < 0.05, Tukey post hoc test). Data are displayed as mean ± SEM