Welcome to JCMC: The Discussion Section, produced by the International Communication Association Podcast Network. I'm Nicole Ellison, the editor-in-chief of JCMC, and today I have with me three of JCMC’s associate editors, all of whom have thought deeply about theorizing CMC in their own scholarship. Through their involvement with ICA’s Communication and Technology Division they also have keen insight into the field and how it's evolved over time. We thought it would be fun to kick off the series by engaging with the question of how we theorize social media. And of course, as part of this discussion, we need to define and clarify what we mean when we say social media. This was part of the rationale for danah boyd in my early 2007 JCMC special issue on social network sites, where researchers were using the term social network site to mean different things or were using other terms when referring to social network sites. And we saw that it was really limiting our ability to theorize and do cross-disciplinary work in a meaningful way. But above and beyond definitions, what are some productive ways to think about theory in this space? I think there's some unique attributes of the social media space that make it especially challenging. For instance, the rapid rate at which social media platforms are evolving, and the fact that every user’s social media experience is algorithmically shaped and therefore idiosyncratic, which is another challenge for theorizing and our methods as well, but we'll leave that discussion for another episode. Without further ado, let me introduce our guests. Lee Humphreys is Professor and Chair of the Department of Communication at Cornell University. Her research interests include mobile and social media, and the ways people incorporate communication technology into their everyday lives. Katy E. Pearce is an Associate Professor in the Department of Communication at the University of Washington and holds affiliations with the Ellison Center for Russian, East European, and Central Asian Studies in the Center for an Informed Public. Her research focuses on social and political uses of technologies and digital content in transitioning democracies and semi-authoritarian states. Finally, Caleb T. Carr is a Professor of Communication at Illinois State University. He researches how new media alter communicative processes, including how social media are used to create and maintain identity online for organizational uncertainty reduction and in group collaborations. Great! Welcome all.