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. Author manuscript; available in PMC: 2014 Feb 1.
Published in final edited form as: Scand J Psychol. 2012 Nov 2;54(1):20–25. doi: 10.1111/sjop.12001

Figure 1.

Figure 1

Example of an infant producing the correct target action on (A) the real 3D duck button box and (B) the 2D duck image depicted on the touch screen. The touch screen image for all stimuli was equated in size to the real 3D object.