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. Author manuscript; available in PMC: 2017 Jan 1.
Published in final edited form as: J Exp Anal Behav. 2016 Jan;105(1):211–229. doi: 10.1002/jeab.190

Fig. 1.

Fig. 1

Screen captures of each digital terrain and its correct object as tested in Experiment 1. The left example shows the “grass” surface material and the right shows the “snow” surface material. Each object also appeared in the other terrain (not shown), and its selection was not rewarded in that context. All terrains and the objects within them moved continuously from the top to the bottom of the display.