Facial expression has been proposed as a key mechanism in forming and maintaining social relationships. Here we show that facial expressivity predicts popularity during initial social group formation.
Newcomers to a social network show preferential attachment, a tendency to befriend those with many friends. Here, we show that preferential attachment is equivalent to a form of ‘probability matching’
Homophily, the tendency of individuals to associate with others who share similar traits, has been identified as a major driving force in the formation and evolution of social ties. In many cases, it
Conflicts between groups are among the most challenging problems of mankind. They arise as groups compete for the possession of certain scarce resources. Under what conditions...