Table 1.
Means and Standard Deviations of Jumping Frequency (Hz).
Fig 1.
Examples of jumping synchrony trajectories.
A) Example time-series from the two most strongly synchronized dyads (both group together) and B) the two most weakly synchronized dyads (both group separate). Note: The x-axis represents the time across the full jumping session (in seconds); the y-axis shows the amplitude of the mean-centered vertical movement, reflecting participants’ oscillatory jumping behavior.
Fig 2.
Cross-recurrence plots (CRPs) averaged across sliding windows and dyads within each group, shown for the group together (left) and separate (right).
Lighter diagonal bands along the main (zero lag) diagonal indicate higher synchrony (i.e., greater movement similarity at lag zero). Axes represent time in seconds within the 10 second window; each pixel indicates recurrence between two time points—one from each dyad member’s movement time series.
Table 2.
Unstandardized (Beta) and standardized coefficients (β) of the linear model: predicting jumping synchrony from experimental group (together vs. separate), initial rapport, and mood. Beta, 95% confidence intervals (CI), and β have been back-transformed to the original scale of the dependent variable (bounded between −1 and 1). Standard errors (SE), t-values, p-values, and Cohen’s f² remain on the Fisher-transformed scale.
Fig 3.
Group differences in jumping synchrony.
A) Jumping synchrony scores in the experimental groups together (blue) and separate (together). The box plots represent medians (center horizontal lines), inter-quartile ranges (boxes), as well as minima and maxima (whiskers) and outliers (dots). B) The effect of the participants’ initial rapport (averaged across the two dyad members) on the dyad’s jumping synchrony score. The lines show the predicted values of the linear model with the predictors experimental group and initial rapport, while holding the non-significant predictor initial mood fixed at its mean. The shaded areas represent the pointwise 95% confidence intervals of the predicted values. Predicted values have been back-transformed to the original scale of the dependent variable (bounded between −1 and 1). The raw data are represented with dots.
Table 3.
Results of the two mixed ANOVAs: Change of rapport and mood in the experimental groups (together vs. separate) over time.