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. Author manuscript; available in PMC: 2018 Jan 1.
Published in final edited form as: Psychopharmacology (Berl). 2016 Oct 6;234(1):89–98. doi: 10.1007/s00213-016-4438-z

Figure 2.

Figure 2

Panel A: Mean Breakpoint from the Cigarette Purchase Task across experimental cigarettes differing in nicotine content (mg/g). Panel B: Mean proportion of choices allocated to different nicotine dose cigarettes during separate 3-hour two-dose concurrent choice sessions. All possible two-dose comparisons across the four nicotine dose cigarettes (0.4, 2.4, 5.2, and 15.8 mg/g tobacco) were examined; only those that differed significantly are shown. The two-dose comparisons are shown on the x-axis with mean proportion of choices allocated to each shown on the y-axis. Asterisks in Panels A and B indicate significant dose differences at p < .05.