Fig. 3: Behavioral results.

a SI score difference between the experimental condition and the control conditions. b Communicative accuracy during the COP difference between the success and failure groups under the experimental condition. c SI score difference between the success group and the failure group under the experimental condition. d Pearson’s correlation analyses between SI and communicative accuracy during the COP under the experimental condition. Data are plotted as violin and box plots for each group, with white dots indicating median values, boxes indicating 25% and 75% quartiles, and whiskers indicating the 2.5–97.5% percentile range. SI shared intentionality, COP coordination period. **p < 0.01, ***p < 0.001.