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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Neuropharmacology. 2015 Jan 17;92:90–97. doi: 10.1016/j.neuropharm.2015.01.003

Figure 6.

Figure 6

Mean (±SEM) infusions obtained during dose-substitution in the MDMA-trained (N=10) Mephedrone-trained (N=9) and Methylone-trained (N=8) rats under a Progressive-Ratio schedule of reinforcement. Significant differences between doses, within drug, are indicated by *.