The Changeability of Social Interaction: Formation and Evolution of Social Networks

As structuralists assert, structural constraints define the probabilities of social interactions. I argue, however, that structural constraints are not static. Using Carley¡¯s (1991) social interaction model as a starting point, I discuss three modified scenarios to illustrate two points: 1) shared facts can either increase or decrease the probability of a desirable interaction, and 2) at the same time, social actors¡¯ active differentiation, selection, and creation of shared facts change the interaction patterns and further reconstruct the social structure. I supplement Carley¡¯s dynamic network model by taking into account the role of social actors in the formation of social interactions; the results highlight the need to study social networks from the structural level and individual level simultaneously.