Fig. 2.

Two of the behavioral parameters indicators of social tolerance in macaques: outcome of approach (A and B) as a proportion of nonagonistic approaches and context of occurrence of silent bared-teeth display (C and D) as a proportion of all occurrences in PB (A and C panels; N = 15) and R1 (B and D panels; N = 21) groups (median, interquartiles and 1.5 interquartile range; post-hoc tests after Friedman, *observed difference > critical difference, ns = observed difference < critical difference).