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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 4.

Figure 4

Effect of reward magnitude on choice behavior. Reducing the size of the delayed reward from 5 to 3 pellets increased the rate at which rats changed their preference from the large, delayed reward to the small, immediate one. A group of rats (N=16) were tested with 3 pellets as the delayed reinforcer and compared to the rats used in Figure 1, which had received 5 pellets as the delayed reinforcer (effect of reward magnitude × delay length, p=0.0301; asterisks indicate significant difference between 3 and 5-pellet groups, p<0.05, Bonferroni-corrected ANOVA post-hoc test.)