Table 1. Spearman correlations between proactive prosociality and social tolerance in common marmoset groups and in all callitrichid groups.

		Proactive prosociality		Social tolerance
		Callithrix	All groups	Callithrix	All groups
		N = 5 groups	N = 7 groups	N = 11 groups	N = 13 groups
# of male helpers	Rho	0.783	0.134	0.386	0.197
	p	0.118	0.775	0.24	0.518
# of female helpers	Rho	−0.872	−0.823	−0.642	−0.696
	p	0.054	0.023	0.033	0.008
Helper sex distribution	Rho	0.900	0.780	0.758	0.733
(% males among helpers)	p	0.037	0.038	0.007	0.004