“…The audience design approach to HHD (Bell, 1984;Clark & Schaefer, 1987) supposes that communication is a joint activity (Clark, 1992;Clark & Wilkes-Gibbs, 1986), whereby interlocutors are willing to expend effort in the conversation in order for their addressee to understand the intended message and co-ordinate meaning. This coordination relies on a "model of the other person!s mind" (Keysar et al, 1998 p. 46), taking into account common ground between the interlocutors (Brennan, 1990;Brennan & Metzing, 2004). Common ground is conceptualised as information that is believed to be shared by, and available to, each interlocutor during dialogue (Clark, 1996;Horton & Keysar, 1996;Shintel & Keysar, 2009).…”