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. 2017 Jan 4;7:1970. doi: 10.3389/fpsyg.2016.01970

FIGURE 1.

FIGURE 1

The Loess fitting curve of the Theory-of-Mind (ToM) sum-score data plotted versus age displays a non-linearity. Based upon the second derivative of this curve three points of developmental interests were found, namely at 56, 72, and 78 months.