Fig. 8.

Mental rotation pace from FREE task matches RT data in Experiment 1. a Mean of median RTs in early learning from Experiment 1 (triangle markers; n = 80) with a regression line, for visualization, on all four groups’ data (red), and the regression line predicted by the mental rotation pace gleaned from the FREE task (n = 32) using the same intercept (dashed black). b Same as a on late learning data, with separate regression lines for the 12T groups (red) and 2T groups (blue). c Schematic describing a parametric to discrete learning shift, which is mediated by set size. Error bars represent 1 s.e.m.