Fig. 4.

Features of interpersonal distance as a proxy of social structure. (A) The matrix represents the average distance for all sessions (n = 19) for each pair of monkeys depicted in matrix form. The redness of each cell represents the average distance between a pair of monkeys. Higher values are obtained for 1st and 4th in the hierarchy (top right). The right panel depicts that the physical distance increases as the rank distance between any two monkeys increases. (B) We computed Euclidean distance between each pair of monkeys over time. Individual density distribution depicts distribution of distance between a given monkey pair. For example, the first panel displays three density functions which depict the distribution of distance between the 1st monkey and the other three monkeys. The same follows for the three other plots. (C) Affiliative strength and affiliative weakness were calculated as the total time each monkey spent with all other monkeys or the total time spent away from other monkeys, respectively. (D) Temporal distribution of close proximity chunks. The same color coding follows as in panel A. The top stars indicate the samples where significant differences have been found. (E) Schematic and results of random walk model capturing bimodal distributions. The top panel shows schematic of simulation of two agents. The bottom panels display an example simulation involving only random walk and the second one involving random walk with an additional social rule of behavior.