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. Author manuscript; available in PMC: 2021 Mar 1.
Published in final edited form as: J Exp Anal Behav. 2020 Feb 20;113(2):468–484. doi: 10.1002/jeab.586

Figure 4.

Figure 4.

Individual rat (R) panels which display the total number of cocaine infusions across training for HIV-1 Tg rats. The transitions between each training stage are indicated with dotted vertical lines. The reinforcement schedule and cocaine dose for each training stage are positioned at the top of each panel. All cocaine doses are in units of mg/kg = milligrams per kilogram per intravenous infusion. * indicates the autoshaping session, FR = fixed ratio, VR = variable ratio, Tg = transgenic.