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. Author manuscript; available in PMC: 2011 Jan 1.
Published in final edited form as: Drug Alcohol Depend. 2009 Aug 29;106(1):28. doi: 10.1016/j.drugalcdep.2009.07.011

Figure 5.

Figure 5

Data shown are mean crossover values (±1 S.E.M.; n=8/group) from the Multiple-Choice Procedure collected at the end of the sample sessions preceding the Relapse Choice Procedure and the Progressive Ratio Procedure; as there was no significant difference on crossover values as a function of session type that followed (for the same doses); means shown here are collapsed across the two procedures. There was a significant effect of cocaine dose (F[2,28]=6.3; p = .006) and a significant difference between the CocAb and CocDep groups (F[1,14]=4.9; p = 044) on crossover values.