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. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: Behav Pharmacol. 2014 Dec;25(8):766–774. doi: 10.1097/FBP.0000000000000095

Figure 4.

Figure 4

Responding on the operant discrimination task after changing to the 4 mg/kg MPH training dose. A,B) Responding on the injection paired lever (IPL), after either vehicle or 4mg/kg MPH injection, was similar for the two groups over 20 sessions of training. The dotted lines indicate criterion levels for the two measures. C) A comparison of FFR and IPL responding averaged over the last 3 days. No significant differences were found and most mice met discrimination criteria. D) Over the last 3 days of the training period, the two groups of mice had similar numbers of sessions of criterion level performance out of 30 possible. Data are mean + SEM except panel D, which are counts.