Table 3 Models testing the effect of developmental stage and food processing complexity on role model choices

From: Social tolerance and role model diversity increase tool use learning opportunities across chimpanzee ontogeny

Model	Response	Term	Estimate	SE	95% CI	95% CI	89% CI	89% CI
Model 3a) The proportion of peering directed at the mother will decrease with age	Identity of the receiver (mother or other individuals)	Intercept	0.25	0.52	−0.79	1.26	−0.59	1.07
		Age	−0.73	0.24	−1.19	−0.24	−1.10	−0.35
		Party size	−0.12	0.12	−0.37	0.12	−0.33	0.07
		Sex (Male)	−0.02	0.39	−0.81	0.73	−0.66	0.61
		Group North^a	−0.17	0.57	−1.29	0.98	−1.08	0.74
		Group South^a	0.08	0.45	−0.80	0.96	−0.63	0.81
		Presence of maternal kin (Yes)	0.05	0.32	−0.58	0.70	−0.47	0.56
		Maternal rank	0.34	0.22	−0.75	0.12	−0.68	0.03
		Age:Party size	0.10	0.11	−0.31	0.11	−0.27	0.07
Model 3b) Immatures will preferentially look at their mothers over alternative role models for the acquisition of complex feeding skills	Identity of the receiver (mother or other individuals) when at least one adult (the mother) is feeding	Intercept	1.92	0.86	0.24	3.61	0.53	3.27
		Age	−0.41	0.42	−1.22	0.43	−1.07	0.27
		Non extractive^b	−0.44	0.44	−1.30	0.47	−1.14	0.25
		Extractive with tools^b	0.71	0.53	−0.37	1.73	−0.15	1.55
		Party size	0.01	0.29	−0.56	0.59	−0.46	0.47
		Sex (Male)	0.50	0.61	−0.70	1.69	−0.48	1.47
		Monopolizability (High)	0.10	0.60	−1.09	1.31	−0.84	1.07
		Group North^a	−0.36	0.80	−1.89	1.21	−1.61	0.92
		Group South^a	−0.21	0.67	−1.48	1.10	−1.27	0.87
		Maternal rank	0.04	0.37	−0.65	0.81	−0.52	0.65
		Presence of maternal kin (Yes)	−0.67	0.53	−1.74	0.38	−1.52	0.18
		Non extractive^b:Age	−0.11	0.34	−0.79	0.54	−0.67	0.43
		Extractive with tool^b:Age	−0.37	0.46	−1.29	0.50	−1.10	0.35
		Non extractive^b:Party size	−0.81	0.32	−1.44	−0.21	−1.32	−0.31
		Extractive with tool^b: Party size	−0.05	0.35	−0.76	0.65	−0.61	0.51

Results of our statistical models 3a and 3b, testing for the effect of contexts on peering, 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.
^bExtractive foraging without tools as reference categories, other contrasts are shown in (Table S3).

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Table 3 Models testing the effect of developmental stage and food processing complexity on role model choices

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