Figure 4.

Social preferences in isolated, MDMA-treated male rats (top left; n = 7) and isolated, MDMA-treated female rats (right; n = 8). Data depict mean (+/− 95% CL) time (s) spent in three equally sized zones during a 900-s partner preference test. The three zones were defined by areas in physical proximity to an unfamiliar MDMA-treated rat (MDMD-Treated), in physical proximity to an unfamiliar saline-treated rat (Saline-Treated), and physically distant from both rats (Alone). Dashed line indicates the theoretical point of indifference (900 s / 3 = 300 s). Filled symbols reflect significant preference for an area, open symbols reflect significant preference against an area, half-filled symbols reflect no significant preference for or against an area. Asterisks and linkage lines indicate significant difference between two areas.