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. Author manuscript; available in PMC: 2012 Sep 3.
Published in final edited form as: Behav Processes. 2011 Jan 5;87(1):50–56. doi: 10.1016/j.beproc.2010.12.017

Figure 3.

Figure 3

Results of Gipson et al. (2009). Most of the pigeons (13 of 16) showed a preference for discriminative stimuli and a probability of 50% reinforcement over nondiscriminative stimuli and a probability of 75% reinforcement.