Fig. 2

Persistence of Social Signatures. Social signatures are persistent at the individual level. This holds for both channels (calls and texts) as well as mixed signatures combining both. Panels a, c, e: Dataset 1 (the large dataset), Panels b, d, f: Dataset 2 (students). The distributions of distances between social signatures of each ego in two consecutive equal-sized intervals are shown in blue (self–distances). The reference distributions of distances between signatures of different egos are shown in red (reference distances). Comparing the distributions of self–distances with reference distances verifies the persistence of call, text and mixed signatures, as self-distances are on average smaller than reference distances