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. Author manuscript; available in PMC: 2016 Jan 1.
Published in final edited form as: Drug Alcohol Depend. 2014 Nov 20;0:52–60. doi: 10.1016/j.drugalcdep.2014.11.003

Fig. 5.

Fig. 5

Effect of 7-day cocaine or food removal on (A) cocaine vs. food choice and (B) and (C) best-fitting parameter estimates of Eq. (1) plotted as a function of extinction manipulation. (A) Ordinate: obtained and predicted (solid curves) proportion cocaine choice. Abscissa: unit dose cocaine in mg/kg/injection (log scale). (B) and (C) Ordinates: sensitivity to reinforcer magnitude (sm) or price (sp). Abscissae: (+)-phenmetrazine dose in mg/kg/h. Model predictions (A) and parameter estimates (B) and (C) were derived from averaging the parameter estimates of the best-fitting model for individual monkeys. Note different ordinate scales in (B) and (C).