“…Previous work on visualising argumentation has mainly been driven by the need for tools to improve the quality of discussions in real-time meetings (Fujita, Nishimoto, Sumi, Kunifuji and Mase 1998;Bachler, Shum, Roure, Michaelides and Page 2003;Rienks et al 2005;Buckingham Shum et al 2006;Michaelides et al 2006). Some research has also addressed the use of such visualisations for browsing past conversations, and end-user evaluations have been positive with respect to impact in retrieval effectiveness Ailomaa and Rajman 2009).…”