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. Author manuscript; available in PMC: 2019 Jun 1.
Published in final edited form as: Drug Alcohol Depend. 2018 Apr 22;187:327–334. doi: 10.1016/j.drugalcdep.2018.03.024

Fig. 5.

Fig. 5

Experiment 2. Active (top) and inactive (bottom) lever pressing during extinction tests given before and after the 7-day treatment period. Contingencies during the extinction tests were identical to self-administration sessions except that cocaine was not delivered. Extinction Test 1 occurred on Day 1 of abstinence, and Extinction Test 2 occurred on Day 15 of abstinence, or 7 days after the last chronic treatment. Lever pressing during the entire 30-min of Extinction Test 1 was compared to the first 30 min of Extinction Test 2. ***p < .001 compared to abstinence Day 1, Bonferroni post-test. All data in figure are represented as mean ± SEM.