Paper Info
Title
Feature-Rich Ego-Network Circles in Mobile Phone Graphs: Tie Multiplexity and the Role of Alters.
Abstract
A well-known result in social science states that, although people maintain a large number of social relationships, in practice, their interactions are concentrated mostly on a small portion of their neighbors. According to Dunbar's hypothesis, this phenomenon is due to a limited human cognitive capacity to handle too many social relationships, together with a few time for socializing. These constraints result in an organization of people's ego-network into four or five groups depending on the strength of the interactions, the so called Dunbar's circles. The verification of the Dunbar's hypothesis, the identification of social circles and their characterization are still open questions, although researchers have found evidence of its validity on different social networks, from small offline networks to online social networks, such as Twitter and Facebook. In addition, little is known about the semantic aspects of the circles, i.e. who are the members of each circle. In this paper, we cope with these issues by analyzing a mobile phone graph where people's interactions are expressed by both voice calls and text messages. We firstly compare two methods for the identification of the circles, which rely on the different definitions of strength proposed in literature. Both methods confirm the subdivision of ego-networks into four or five circles, each characterized by a specific interaction strength. Then, we validate the Dunbar's hypothesis and, by leveraging some powerful features of the mobile phone dataset in use, we provide a first semantic characterization of social circles. We show, for instance, that people maintain relationships with the members of the closest circles by combining calls and texts. In addition, by detecting home and work locations of each individual, we highlight that a semantic aspect, such as the role of the alters, impacts on the ego-network circles. In particular, family members and workmates are located in different circles: the former mainly form the closest circle, i.e. the support clique, while the latter are distributed among the outer circles.
Year
DOI
Venue
2018
10.5555/3382225.3382482
ASONAM '18: International Conference on Advances in Social Networks Analysis and Mining Barcelona Spain August, 2018
Keywords
Field
DocType
ego-networks, Dunbar's circles, mobile phone graph, strong and weak ties
Data science,Social network,Clique,Computer science,Id, ego and super-ego,Subdivision,Artificial intelligence,Mobile phone,Phenomenon,Socialization,Cognitive load,Machine learning
Conference
ISBN
Citations 
PageRank 
978-1-5386-6051-5
0
0.34
References 
Authors
0
4
Name
Order
Citations
PageRank
Christian Quadri1277.96
Matteo Zignani28513.07
Sabrina Gaito320929.64
Gian Paolo Rossi439078.09