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. Author manuscript; available in PMC: 2015 Feb 17.
Published in final edited form as: J Exp Psychol Anim Learn Cogn. 2014 Jan;40(1):12–21. doi: 10.1037/xan0000010

Figure 2.

Figure 2

Experiment 1: Choice of the suboptimal alternative as a function of training. Error bars indicate ± one standard error of the mean. All of the pigeons received at least 35 sessions of training.