Developing Mobile Multimodal Applications

In this paper we present three major aspects of our research on mobile multimodal applications and middleware: device-independence, prototype applications, and user involvement. We followed modelbased principles, which provided us with challenges which we report upon in this paper. We discuss the development of a multimodal game and a messaging client designed for mobile hands-busy or eyesbusy situations. We involved users throughout the whole development process in order to gain insights into the appropriateness and possible use of different modalities in various contexts.