Table 3.

Results of the ‘sex-top-associate’ (Model 1a) and ‘sex-significant-associates’ (Model 1b) models fitted to test for species differences in the sex combination of top and significant associates. Significant p-values are indicated in italics. p-Values are only given for terms not included in an interaction. Results are based on PAV values derived from the ‘individual randomization’. Results for other randomizations are provided in electronic supplementary material, tables S2 and S5.

Model 1a sex-top-associateModel 1b sex-significant-associates
sample sizenumber of top associates across all quarters = 3892, number of unique individual ID = 314, number of quarter ID = 200, number of communities = 7number of significant associates across all quarters = 17 545, number of unique ID = 312, number of quarter ID = 312, number of communities = 7
null versus full modelχ2d.f.p-valueχ2d.f.p-value
22.3352<0.00110.77920.005
estimate ± s.e.χ2p-valueestimate ± s.e.χ2p-value
intercept0.60 ± 0.27−0.50 ± 0.19
sex (male)−0.64 ± 0.47−0.20 ± 0.36
species (chimpanzee)−1.50 ± 0.30−0.54 ± 0.22
sex × species3.21 ± 0.5315.41<0.0011.52 ± 0.417.620.006