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. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: Behav Processes. 2014 Jul 19;112:49–60. doi: 10.1016/j.beproc.2014.07.006

Figure 2.

Figure 2

The six stimulus classes shown in Figure 1 rearranged to show common class elements (ellipses). Letters denote the nominal stimuli (R = red, G = green, B = blue, W = white, T = triangle, H = horizontal) and numbers denote ordinal position in a trial (1 = first (sample), 2 = second (comparison)).