This article focus on paradigms, methods and ethics of action research in the Scandinavian countries. The specific features of the action research paradigm are identified. a historical overview follows of some main action research projects in Norway, Sweden and Denmark. The tendency towards upscale action research projects from organisational or small community projects to large-scale, regional based network approaches are also outlined and discussed. Finally, a synthesised approach of the classical, socio-technical action research approach and the large-scale network and holistic (...) approaches is suggested as a promising approach for the future. (shrink)