Table 1.

Nested mixed effects models for the two dependent variables inclusion of other in the self (IOS) and likeability of the virtual other (LIKE) investigating the effects of the independent variables synchrony, musical pattern (i.e., cultural familiarity), and enjoyment of the music. Every model includes the random effect (1 | participant). The Akaike information criterion (AIC), Bayesian information criterion (BIC), marginal R² (variance explained by fixed effects only), and conditional R² (variance explained by fixed and random effects) are provided. χ² and p values refer to model comparisons to the previous model (unless stated otherwise) using likelihood ratio tests. Null model: IOS ~ (1 | participant). Best fitting models are marked in bold letters.

Dependent variable: IOS; Independent variables: Synchrony, Musical Pattern, Enjoyment of Music
Model	AIC	BIC	Marginal R2	Conditional R2	Improvement in Model Fit
					χ2(1)	p
IOS Null Model	2235	2246		0.338
IOS ~ Synchrony	2059	2073	0.310	0.750	178.52	<0.001
IOS ~ Synchrony + Musical Pattern	2047	2064	0.324	0.767	14.35	<0.001
IOS ~ Synchrony × Musical Pattern	2049	2069	0.323	0.766	0	0.999
IOS ~ Synchrony + Musical Pattern + Enjoyment	2035	2056	0.356	0.770	13.17°	<0.001°
IOS ~ Synchrony × Enjoyment + Musical Pattern	2028	2052	0.364	0.781	9.61	0.002
Dependent variable: LIKE; Independent variables: Synchrony, Musical Pattern, Enjoyment of Music
Model	AIC	BIC	Marginal R2	Conditional R2	Improvement in Model Fit
					χ2(1)	p
LIKE Null Model	2097	2108		0.299
LIKE ~ Synchrony	2007	2020	0.210	0.577	92.87	<0.001
LIKE ~ Synchrony + Musical Pattern	1977	1994	0.260	0.642	31.66	<0.001
LIKE ~ Synchrony × Musical Pattern	1978	1999	0.260	0.642	0.36	0.551
LIKE ~ Synchrony + Musical Pattern + Enjoyment	1934	1955	0.398	0.655	44.38^	<0.001^
LIKE ~ Synchrony × Enjoyment + Musical Pattern	1935	1960	0.399	0.656	1.06	0.304

°As compared to model IOS ~ Synchrony + Musical Pattern.

^As compared to model LIKE ~ Synchrony + Musical Pattern.