Switching in Twitter's Hashtagged Exchanges

Networks have a remarkable ability to bring people together in communities, both online and offline, but such community building is not the only possible result of network use. This article examines the case of a tagging network on Twitter, the online social networking service characterized by short messages. Although Twitter has many social features that foster interaction between users, the use of hashtags to signal the topic of a message exists outside of the site's primary social structures, creating a unique writing environment. This article analyzes a hashtagged exchange surrounding the 2009 health care debate in the United States, examining the social features of this exchange and how participants used it to communicate about that debate. While traditional social features were certainly present within the exchange, they were not prominent or common; rather, users engaged the network properties of this exchange to make connections with other networks, drawing on a form of network power called switching. The analysis focuses on how the Twitter network's structural features affect communication between users.