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. Author manuscript; available in PMC: 2022 Mar 1.
Published in final edited form as: Psychopharmacology (Berl). 2020 Nov 24;238(3):735–744. doi: 10.1007/s00213-020-05726-2

Fig 2.

Fig 2

Mean number of reinforcers earned for individual subjects when responding for MDPV (circles), cocaine (squares) or food (triangles) in rats with a MDPV-history (top; n=10), cocaine-history (middle; n=9) or food-history (bottom; n=10). Left panels represent mean number of reinforcers earned during the final 3 sessions on FR5:TO 5-sec schedule of reinforcement for the original reinforcer and for MDPV. Abscissa: reinforcer available. Ordinates: mean number of reinforcers earned. Right panels represent the correlation between percent TO responding and mean number of 0.032 mg/kg/infusions of MDPV earned, where high-responders (filled symbols) made more than or equal to 20% of responses during the 5-sec TO and low-responders (open symbols) made less than 20% of responses during the TO. Abscissa: percent responses made on the active lever during TOs versus total active lever responses. Ordinates: mean number of MDPV infusions earned