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. Author manuscript; available in PMC: 2009 Feb 1.
Published in final edited form as: Behav Processes. 2007 Dec 3;77(2):199–209. doi: 10.1016/j.beproc.2007.11.009

Fig. 5.

Fig. 5

Percentage of metric errors measured over 36 discrimination training sessions for the Pigeon Consistent Group and the Pigeon Partial Group. The dashed line indicates chance discrimination performance (50%).