The effects of repeated MA on SI after short-term abstinence. (A) Locomotor activity following injections for each day of the induction phase (**p <0.01, ***p <0.001, ****p<0.0001, significantly higher locomotor activity compared to CTRL animals; ###p<0.001, ####p<0.0001, significantly lower within-group locomotor activity compared to Day 1 in SENS animals). (B) Stereotypy following injections for each day of the induction phase (***p< 0.001, significantly higher stereotypy ratings compared to CTRL animals; #p<0.05, ##p<0.01, ###p<0.001, significantly higher within-group stereotypy compared to Day 1 in SENS animals). (C) Interaction time one day after the last SAL or 5.0 mg/kg MA injection. All data are depicted as mean ± SEM. (MA: n = 10; SAL: n = 9; Partners: n = 7).