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. Author manuscript; available in PMC: 2020 Dec 1.
Published in final edited form as: Psychopharmacology (Berl). 2019 Jul 26;236(12):3677–3685. doi: 10.1007/s00213-019-05339-4

Figure 3.

Figure 3.

Estimates of reinforcing effectiveness obtained for methamphetamine, MDPV, and α-PVP, normalized to cocaine for each of 4 rhesus monkeys (identified as 1, 2, 3, or 4). Top Panel: Data represent the maximum number of infusions of methamphetamine, MDPV, and α-PVP earned, normalized to the maximum number of infusions earned for cocaine for each monkey. Bottom Panel: Data represent the final ratio completed for the dose that maintained the maximum number of infusions of methamphetamine, MDPV, and α-PVP earned, normalized to the final ratio completed for cocaine for each monkey.