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. Author manuscript; available in PMC: 2010 Sep 1.
Published in final edited form as: Pharmacol Biochem Behav. 2008 Dec 16;93(3):263–269. doi: 10.1016/j.pbb.2008.12.005

Figure 1.

Figure 1

Mean number (SEM) of half cigarettes smoked by token value. Subject chose more cigarettes following SD vs NS depending on the token value (Condition × Token Interaction F (1, 12) =3.4; p≤0.050).