Kristin Hocevar, Miriam Metzger, and Andrew J. Flanagin
Our understanding and perceptions of source credibility significantly drive how we process health and risk messages, and may also influence relevant behaviors. Source credibility is believed to be impacted by both perceptions of source trustworthiness and expertise, and the effect of credibility on changes in attitudes and behavior has been studied for decades in the persuasion literature. However, how we understand and define source credibility—particularly the dimension of expertise—has changed dramatically as social media and other online platforms are increasingly used to design and disseminate health messages. While earlier definitions of source credibility relied heavily on the source’s credentials as indicators of expertise on a given topic, more recent conceptualizations must also account for expertise held by laypeople who have experience with a health concern. This shifting conceptualization of source credibility may then impact both why and when people select, as well as how they perceive, process, and judge, health messaging across both novel and more traditional communication contexts.
As the use of online technologies has grown in recent years, so has the study of computer-mediated communication.
Online communication began in universities through the use of e-mail. Soon, spaces such as multi-user dungeons (MUDs), Listserv, and bulletin boards were developed, which not only allowed people who knew each other offline to interact but also enabled individuals who were not previously acquainted to communicate via the Internet. The development of Web 2.0, which allowed for more user-generated content, led to new and innovative ways of interacting online, most notably thorough social media sites. Social media sites, such as Facebook and Twitter, allow not only for text-based interaction to occur but also for image- and video-based interaction.
Through all these developments, interactional norms and practices have developed. A key factor in these norms is what the medium enables, or affords, participants to do. Features such as whether an interactional platform is synchronous or asynchronous can impact the nature of the interaction. Similarly, the lack of visual or verbal contact when interacting may impact upon the interaction, through the potential for misunderstandings. Participants do, though, develop practices to suit the medium. If we examine these practices in detail, it is possible to also analyze the role which technology plays in the interaction. One method that has been used to do this is conversation analysis, which was developed for and using spoken interaction. Conversation analysis examines conversation in forensic detail to illuminate the norms and practices through which we conduct our everyday lives. In using this method for analyzing online interaction, we can not only understand the practices but also examine the affordances of particular interactional platforms.
Various interactional features of computer-mediated communication (CMC) have been examined from a conversation analytic perspective, including sequential organization, openings, turn-taking, and repair. A common focus of these studies it to explore the interactional patterns but also to understand how these might be impacted by the technology itself. The development of norms for a variety of forms of technologized interaction demonstrates how individuals are capable of adapting their interactional practices for new contexts.
This is an advance summary of a forthcoming article in the Oxford Research Encyclopedia of Communication. Please check back later for the full article.
Video-mediated communication (VMC) has a long history. Fictional depictions of variously named VMC systems began appearing in late 19th century illustrations and novels as plausible extensions of telegraphy, telephony, and filmic and televisual moving pictures. AT&T demonstrated experimental one-way combined telephone and television streams in 1927, and the German Post Office had a fully operative public videophone system as early as 1936. However, despite the apparent early progress, VMC has had a surprisingly rocky path to mainstream use—indeed, it might even be argued that VMC is still not the ubiquitous medium one would assume of “the next best thing to being there” (as Julius Molnar said of the AT&T Mod I in the 1960s). Commercial VMC and research have intertwined themes. Changing technologies and difficulties in institutional and domestic commercialization are set against research into the value, form-factors, and member methods for conveying social presence over distance. These issues are as relevant to current VMC as they have ever been, and augmented reality technologies will introduce yet more new opportunities and challenges.