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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: J Exp Child Psychol. 2014 Mar 17;123:15–35. doi: 10.1016/j.jecp.2014.01.009

Figure 5.

Figure 5

Three measures of performance in Experiment 1 as a function of age group. Left: Proportion of trials on which the axis of elongation of the object and the rectangular slot were aligned (within the 25° tolerance of the opening) on initial approach (just prior to insertion). Center: Mean degree of measured alignment of the elongated axis of the object and the slot. The standard error of the mean is provided for both measures. Right: Histogram of all insertions within 10° bins (bins labeled by the maximum angle included) across all participants and stimuli for 18 month olds and for 24 month olds.