... expertise model in AthosMail, a mobile, speech-based e -mail system. The model encodes the system s assumptions about the user expertise, and gives recommendations on how the system should respond ... that the user is always new to the system, but an e- mail system is personal and the user could presumably benefit from personalized adaptations. If the system stores user modelling information ... errors. In Section 5, we provide conclusions and future work. 2 System functionality AthosMail is an interactive speech-based e -mail system being developed for mobile telephone use in the project...