Table 2.

Association index, interaction frequencies, and proportion of possible partners interacted with for different social levels (mean ± SD)

Level	AI	Affiliation		Agonism		Greetings
		IF	PP	IF	PP	IF	PP
Party	0.65 ± 0.10	0.08 ± 0.11	0.47 ± 0.21	0.04 ± 0.03	0.58 ± 0.16	0.24 ± 0.16	0.70 ± 0.07
Gang	0.24 ± 0.10	0.01 ± 0.02	0.13 ± 0.13	0.01 ± 0.02	0.46 ± 0.22	0.04 ± 0.04	0.71 ± 0.21
Community*	0.07 ± 0.02

Values refer to mutually exclusive categories (i.e., “Party” refers to dyads within parties, “Gang” refers to dyads in different parties of the same gang; “Community” refers to dyads in different gangs). We observed no interactions between the individually identified members of the two focal gangs. AI, association index (i.e., the proportion of time spent in 20 m proximity); IF, dyadic hourly interaction frequency; PP, average proportion of possible partners with whom individuals effectively interact.

^*2011 only.