It has its own characteristics, and evokes unexpected behaviour from the participants.
Many studies investigate the influence that video mediation has on the process of communication.
In this paper we look at a little-studied effect, on speech production. This is unexpected, because when speakers can see each other face to face, their speech is less clear. A video image encourages speech that is more clearly articulated, and the paper will argue that video images can be a distraction rather than a help.