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. Author manuscript; available in PMC: 2010 Mar 11.
Published in final edited form as: Comp Cogn Behav Rev. 2007 Jan 1;2:79–92. doi: 10.3819/ccbr.2008.20005

Figure 5.

Figure 5

Mean percentage correct for baseline and transfer at each set size for the three species in the S/D procedure. Error bars represent SEMs. Note. From Figure 3, “Same/different abstract-concept learning by pigeons,” by J. S. Katz and A. A. Wright, 2006, Journal of Experimental Psychology: Animal Behavior Processes, 32, p. 85. Copyright 2006 by the American Psychological Association. Adapted with permission