The media landscape and its societal significance is in rapid transition; likewise basic features of democracy are changing. In this article we pursue these two strands in order to sketch the background to a need for a new research agenda, as well as to arrive at proposals regarding the directions that such research can take. In regard to democracy our emphasis is on the dimension of participation, while the developments in the media we capture with the term mediatisation, which signals not only the ubiquity of media but also the processes by which society increasingly adapts itself to media logics. The first section takes up political engagement and situates it within the changing character of democracy. The second section is focused on the media and dynamics of mediatisation, underscoring their significance for democratic participation. In the third section we provide the foundations for a research agenda on mediatisation and democratic participation.

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• Media and Communications - Social Sciences