Participation of citizens in matters of policy is important for a well-functioning democracy. Many scholars have suggested deliberative democracy as a suitable model for this. However, concern for groups with weak interest in participating raise some doubt whether this really will be more democratic in the end. In this essay we outline a theoretical model for designing ICT systems so that they stimulate and train democratic dialogue. The model is based on psychological research on decision making and a definition of democracy as a dialectic process, and can be applied to practically any forum where ideas are exchanged.