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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: Pharmacol Biochem Behav. 2012 Jan 12;101(2):187–192. doi: 10.1016/j.pbb.2012.01.006

Figure 1.

Figure 1

Effect of delay length on choice behavior. As delay length increased over the course of five days, subjects shifted preference from the large, delayed reward, to the immediate, small reward. (N=17, effect of delay length, p<0.0001).