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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. 1.

Fig. 1

The four shapes used in Experiment 1. The left panel lists the nonaccidental properties for each shape. The dashed lines indicate potential locations of the brick wall, an irrelevant feature of the pictorial stimuli in the present discrimination.