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. Author manuscript; available in PMC: 2014 Mar 1.
Published in final edited form as: Dev Sci. 2012 Dec 18;16(2):149–158. doi: 10.1111/desc.12011

Figure 1.

Figure 1

A schematic of one experimental trial. A cue loomed on the screen for two seconds, was replaced by two empty boxes for one second, and then a reinforcer played in one of the boxes for two seconds.