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All animals made fewer errors at the beginning of each session as learning progressed. Significant group differences in the number of errors before switching response were found at the beginning of the reversal learning phase. Both mAMPHescal and mAMPHsingle groups committed more errors before making their first correct response compared to SAL animals on sessions 1 and 3. Group means + SEM, *p<0.05, **p<0.01.
