Table 5. GAMMs predicting the change in dyadic relationship strength (SRI values for affiliative contact and proximity) between orphans (O) and other group members (GM) following maternal loss (n = 755).

	Affiliative contact			Proximity
	Est ± SE	Z	p	Est ± SE	Z	p
Intercept	0.028 ± 0.005	5.508	<0.001	0.058 ± 0.018	3.180	0.002
Orphan
Age (years)	−0.001 ± 0.000	−1.640	0.101	−0.004 ± 0.002	−2.033	0.042
Sex (male)	0.000 ± 0.002	−0.034	0.973	−0.003 ± 0.006	−0.503	0.615
Group member
Age-mate (within 2 years)	−0.001 ± 0.002	−0.623	0.534	0.020 ± 0.007	2.885	0.004
Maternal sibling	−0.014 ± 0.011	−1.305	0.192	0.010 ± 0.037	0.284	0.777
Group member age/sex class (relative to a dominant male)
Adult male (subordinate)	−0.023 ± 0.005	−4.911	<0.001	−0.033 ± 0.017	−1.973	0.049
Adult female	−0.024 ± 0.005	−5.083	<0.001	−0.016 ± 0.017	−0.959	0.338
Blackback male	−0.023 ± 0.005	−4.731	<0.001	−0.032 ± 0.018	−1.782	0.075
Subadult male	−0.026 ± 0.005	−4.801	<0.001	−0.021 ± 0.020	−1.038	0.299
Subadult female	−0.018 ± 0.005	−3.205	0.001	−0.003 ± 0.020	−0.151	0.880
Juvenile	−0.021 ± 0.005	−3.930	<0.001	−0.002 ± 0.019	−0.124	0.902
Infant	−0.021 ± 0.005	−4.224	<0.001	−0.006 ± 0.018	−0.334	0.738
Age/sex class–sibling interaction (relative to a non-sibling dominant male)
Adult male (sub.) sibling	0.041 ± 0.013	3.210	0.001	0.052 ± 0.043	1.231	0.219
Adult female sibling	0.015 ± 0.014	1.016	0.310	−0.048 ± 0.048	−0.986	0.324
Blackback male sibling	0.004 ± 0.015	0.243	0.808	−0.044 ± 0.049	−0.896	0.371
Subadult male sibling	0.001 ± 0.017	0.042	0.966	−0.107 ± 0.057	−1.876	0.061
Subadult female sibling	0.058 ± 0.017	3.387	0.001	0.011 ± 0.058	0.197	0.844
Juvenile sibling	−0.020 ± 0.021	−0.955	0.340	−0.118 ± 0.072	−1.643	0.101
Infant sibling	−0.004 ± 0.015	−0.282	0.778	−0.096 ± 0.052	−1.850	0.065

Smooth term: s(mean focal scans) Contact: F = 6.955, p=0.008; Proximity: F = 7.288, p<0.001.