Fig. 2.

Relational match (1) and nonmatch (0) options selected by 18- to 48-mo-olds in the United States and China in experiments 1 and 2, plotted with logistic regression fit lines. US toddler data (blue dots left of the indicator lines at 36 mo) are from Walker et al. (ref. 15, experiment 1). Shaded regions indicate 95% confidence intervals with Loess smoothing.