This chapter presents a systematics of chat interaction. Online chats are advantageous sites for examining the organization of social interaction as achieved through computer-mediated communication. Chats differ from talk-in-interaction since the composition and visual inspection of text and graphical objects by any given actor is not observable by other participants. These structural constrain...

In this article we derive implications about social positions from a formal theory of social influence. The formal theory describes how, in a group of actors with heterogeneous initial opinions, a network of interpersonal influences enters into the formation of actors' settled opinions. We derive the following conclusions about a special form of structural equivalence. If actors are structurall...

In this paper we sketch a framework for multi-actor simulation of an organization. In contrast to many approaches to multi-actor simulation, we design the actors as cognitively plausible actors. The interaction and cooperation of the actors is based on social constructs. In elaborating a cognitive perspective on actors, we use the cognitive architecture ACT-R for modelling the individual actors...

We consider the problem of labeling actors in social networks where the labels correspond to membership in specific interest groups, or other attributes of the actors. Actors in a social network are linked to not only other actors but also items (e.g., video and photo) which in turn can be linked to other items or actors. Given a social network in which only some of the actors are labeled, our ...

3. DEFINITION Spatio-temporal social networks model the relationships expressed in a social network and the changes to it over time. These changes can be of two types; First, Changes to the level of expressed relationship between two or more actors. For example, in a social network which expresses trust, there could be a change in the level of trust between two actors. Second, changes to the ph...