Table S3.

Social cognition ROIs tracking target popularity during the face-viewing task: Results of linear mixed-effects models (one model for each ROI) regressing activation parameter estimates against target popularity and covariates (i.e., to rule out alternative explanations and potential confounds)

Variable	dmPFC				Precuneus				lTPJ				rTPJ
	Est.	SE	df	P	Est.	SE	df	P	Est.	SE	df	P	Est.	SE	df	P
Target variables
Popularity	0.223	0.087	195.6	0.011	0.162	0.059	196.0	0.007	0.171	0.069	197.6	0.014	0.065	0.050	197.7	0.195
Facial trustworthiness	−0.020	0.007	191.2	0.007	−0.012	0.005	191.6	0.016	−0.009	0.006	193.2	0.133	−0.006	0.004	193.6	0.154
Facial attractiveness	0.015	0.007	190.3	0.034	0.012	0.005	190.7	0.011	0.007	0.005	192.2	0.177	0.005	0.004	192.7	0.200
Male	−0.454	0.150	186.4	0.003	−0.325	0.102	186.8	0.002	−0.215	0.119	188.2	0.071	−0.221	0.086	189.0	0.011
Age	0.016	0.034	186.9	0.640	−0.025	0.023	187.2	0.292	−0.042	0.027	188.4	0.123	−0.025	0.020	189.3	0.209
Relational variables
Personal liking	−0.005	0.005	203.0	0.364	−0.008	0.004	202.9	0.033	−0.004	0.004	201.9	0.386	−0.003	0.003	202.3	0.357
Perceived closeness	0.007	0.004	198.1	0.103	0.004	0.003	196.7	0.229	0.000	0.003	190.7	0.884	0.001	0.002	193.0	0.626
Perceived similarity	0.000	0.004	199.8	0.955	0.002	0.003	200.2	0.478	0.000	0.003	201.7	0.934	0.000	0.002	201.5	0.924
Length of relationship	−0.002	0.020	191.4	0.931	−0.002	0.014	189.1	0.901	0.020	0.016	179.7	0.214	0.002	0.011	183.5	0.859
Hours per week spent together	0.019	0.039	203.0	0.627	0.031	0.027	202.9	0.249	−0.015	0.031	201.8	0.634	0.009	0.022	202.2	0.692
Frequency of contact	−0.015	0.020	196.5	0.457	0.003	0.013	197.1	0.802	0.000	0.015	199.1	0.989	0.002	0.011	199.0	0.857
(Intercept)	0.329	1.004	193.2	0.744	1.542	0.685	193.1	0.025	1.589	0.793	193.0	0.046	1.179	0.574	193.8	0.041

Boldface values connote P < 0.05, two-tailed. df reflects degrees of freedom calculated using the Kenward–Roger method (57).