TABLE 1.

Fixed effects and random effects model for hypothesis 2 and hypothesis 3.

	Synchrony
Predictors	Estimates	Std. error	Std. beta	Standardized std. error	CI	Standardized CI	p	Adjusted p
(Intercept)	1.41	0.43	−0.04	0.18	0.56–2.26	−0.39–0.31	0.001
Outcome (change in LoPF)	−0.01	0.00	−0.43	0.18	−0.02 – −0.00	−0.78– −0.09	0.014	0.040
Goodness of session (SEQ)	−0.14	0.06	−0.10	0.04	−0.26 – −0.03	−0.18 – −0.02	0.012	0.024
Session number	−0.02	0.01	−0.08	0.04	−0.03 – −0.00	−0.16 – −0.01	0.032
Random effects
σ2		0.71
τ00 id		0.67
ICC		0.48
Marginal R2/Conditional R2		0.180/0.577
Deviance		803.340

The table shows the predictors of synchrony that were selected by the stepwise elimination procedure. Adjusted p-values are shown for variables used in the three hypotheses of the article.