抄録
A large number of immigrants have come into Japan for working, but with insufficient oral training. This often causes oral communication troubles at work. In this study, we show two approaches to solve this problem, where learners are provided with chances of oral interaction with native speakers to know how and when their spoken Japanese become unintelligible to native listeners. The first approach is inter-learner shadowing. Learners' utterances are shadowed by native listeners, and their native but regionally-accented utterances are shadowed by the learners. By measuring smoothness of shadowings automatically, it is possible to clarify what kind of spoken words in foreign-accented and regionally-accented Japanese can become unintelligible. The second is inter-learner tutoring, where every learner can support others learning his/her mother tongue as conversation partner or teacher. For this approach, we developed a smartphone app.
