Impulsivity predicts the escalation of cocaine self-administration in rats

Justin J. Anker; Jennifer L. Perry; Luke A. Gliddon; Marilyn E. Carroll

doi:10.1016/j.pbb.2009.05.013

Fig. 2

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Mean (± SEM) number of cocaine infusions earned by HiI and LoI rats under a PR schedule before (left panel) and after (right panel) extended access.