Julie Letierce, Alexandre Passant, John Breslin, Stefan Decker. In Proceedings of the WebSci10: Extending the Frontiers of Society On-Line (15 March 2010). According to a survey we recently conducted, Twitter wasranked in the top three services used by Semantic Web re-searchers to spread information. In order to understandhow Twitter is practically used for spreading scientific mes-sages, we captured tweets containing the official hashtags ofthree conferences and studied (1) the type of content thatresearchers are more likely to tweet, (2) how they do it, andfinally (3) if their tweets can reach other communities — inaddition to their own. In addition, we also conducted someinterviews to complete our understanding of researchers’ mo-tivation to use Twitter during conferences. research science social_networks twitter