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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: Physiol Behav. 2019 Oct 31;213:112730. doi: 10.1016/j.physbeh.2019.112730

Fig. 3.

Fig. 3

(a) Mean (± SEM) active and inactive lever presses across 10 days of 2-hr extinction training in OR and OP groups. Responses had no programmed consequences (i.e., no CS or pellets). (b) Mean (+ SEM) active and inactive lever presses during the last extinction session and CS-induced reinstatement testing in OR and OP rats. During reinstatement testing, conditions were identical to those of the self-administration sessions, except that lever presses did not lead to pellet delivery. ##p < .01 and ###p < .001 compared to extinction, Bonferroni post-test.