Statistics for egocentric network sizes of different trait subgroups.

The median, the first quartile (Q1) and the third quartile (Q3) for each subgroup are reported. We performed the Kruskal-Wallis test (KW) and the Kolmogorov-Smirnov test (KS) in order to assess eventual differences between the distributions of the reference distances of opposite subgroups (e.g. extroverts and introverts). Only the Kruskal-Wallis (KW) and Kolmogorov-Smirnov (KS) tests with p < 0.05 are reported.