Table 4 Models testing developmental effects on the number and the characteristics of peered role models (age and social tolerance)

Prediction	Response	Term	Estimate	SE	95% CI	95% CI	89% CI	89% CI
Model 4a) Number of observed role models will peak around weaning	Number of observed non-mother role models	Intercept	−1.66	0.12	−1.89	−1.43	−1.85	−1.48
		Age	0.15	0.07	0.00	0.29	0.03	0.27
		Age²	−0.14	0.07	−0.27	0.00	−0.25	−0.03
		Group North^a	−0.22	0.20	−0.63	0.18	−0.56	0.11
		Group South^a	0.07	0.13	−0.18	0.33	−0.13	0.28
Model 4b) Peerers seek tolerant role models older than themselves	Number of peering events directed at non−mother role models	Intercept	−5.70	0.60	−6.90	−4.53	−6.67	−4.76
		Age peerer	−0.24	0.44	−1.10	0.62	−0.93	0.45
		Age receiver	0.95	0.10	0.76	1.16	0.79	1.12
		Maternal kin (No)	−0.20	0.36	−0.90	0.52	−0.77	0.38
		Dyadic association index	−0.12	0.13	−0.38	0.13	−0.33	0.08
		Age peerer²	−0.42	0.15	−0.73	−0.12	−0.67	−0.18
		Group North^a	−0.03	0.43	−0.88	0.82	−0.70	0.67
		Group South^a	0.37	0.31	−0.25	0.99	−0.12	0.87
		Sex receiver (Male)	−0.07	0.25	−0.56	0.41	−0.46	0.32
		Sex peerer (Male)	0.11	0.28	−0.46	0.66	−0.35	0.57
		Proportion of time in less than 1 m	0.44	0.11	0.21	0.65	0.26	0.61
		Age peerer:Age receiver	0.26	0.11	0.07	0.47	0.10	0.43
		Age peerer:Maternal kin (Yes)	0.13	0.35	−0.55	0.82	−0.43	0.67
		Age peerer:Dyadic association index	−0.05	0.11	−0.28	0.17	−0.23	0.13
		Sex receiver:Sex peerer	0.02	0.28	−0.53	0.57	−0.42	0.44

Results of our statistical models 4a and 4b, testing for the effect of age on the number of observed role models, including the dependent variables, the effects with associated estimated error and credible interval at 95 (in bold if they did not cross 0) and 89%.
^aGroup East as reference category, other contrasts are shown in (Table S3).

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