Table 3. Effects of grunts on likelihood of subsequent interactions.

	Odds Ratio	S.E.	Z	P
Infant handling	47.66	3.89	47.60	< 0.001
Affiliation	4.08	0.23	24.50	< 0.001
Aggression	0.12	0.05	-4.70	< 0.001

Analysis controlled for kinship and relative rank.