. Author manuscript; available in PMC: 2022 Jul 1.

Published in final edited form as: Dev Sci. 2021 Mar 2;24(4):e13086. doi: 10.1111/desc.13086

Table A-4.

Linear mixed model output for effects of Age, Language Group, Video Direction, and Trial Order on infants’ face preference index.

	Face Preference Index (FPI) for Infants
Predictors	Estimates	std. Error	CI	Statistic	p
(Intercept)	0.139	0.265	−0.369 – 0.658	0.527	0.598
Age	−0.039	0.029	−0.095 – 0.016	−1.366	0.172
Language Group [Signing]	0.453	0.168	0.132 – 0.774	2.703	0.007
Video Direction [Reversed]	0.124	0.056	0.015 – 0.232	2.227	0.026
Trial Order	−0.015	0.005	−0.025 – −0.005	−2.96	0.003
Language Group [Signing] * Video Direction [Reversed]	−0.129	0.086	−0.297 – 0.04	−1.494	0.135
Random Effects
σ²	0.15
τ_{00 name}	0.14
τ_{00 story}	0.01
ICC	0.50
N _name	26
N _story	8

Observations	349
Marginal R²/ Conditional R²	0.135 / 0.569