Fig. 4: INS enhancement during the task.

a One-sample t-test map of INS in the right temporal-parietal areas under the experimental condition (two-tailed, corrected by FDR). b One-sample t-test map of INS in the right temporal-parietal regions under the control condition (two-tailed, FDR correction). c One sample t-test map of INS for the permutated time series based on the original data (two-tailed, FDR correction). d The paired samples t-test INS at CH15 under different conditions (experiment vs. control). e The paired samples t-test INS at CH15 under different conditions (experiment vs. random). 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. INS interpersonal neural synchronization, COP coordination period. ***p < 0.001.