Abstract: The invention relates to methods and systems for providing interactive question-based applications over communication networks. According to the invention, information specifying questions and answers are stored in a first data unit, actions specifying how questions should be presented to users are stored in a second data unit, and rules specifying how presented material should be treated for display on different types of terminals are stored in a third data unit. This separation of content, functional logic, and presentation style simplifies the creation of new questionnaires and their delivery to different terminals over different communication networks.