“…Controversies have been widely appreciated as opportunities for analyzing the uncertainties and complexities of science and technology (Latour, 1989, Callon, 1981, Barthe and Linhardt, 2009, Barry, 2001, Meyer, 2009 , as well as for giving account of the distributed character of knowledge production in form of 'hybrid forums' Rip, 1991, Callon et al, 2009) This interest in controversies as opportunities for promoting public participation in science and technology is certainly shared with other participatory devices. Constructive technology assessment (Rip, Misa and Schot, 1995; discussed in some detail in chapter one) or consensus conferences (Joss and Duran, 1995) usually deal with large scale controversies on conflictive issues such as genetically modified organisms (Einsiedel, Jelsøe, and Breck, 2001), telecommunications (Guston, 1999), or nanotechnologies (Powell and Kleinman, 2008;Laurent, 2009;Rip, 2007 We would then ask for the particular kind of 'public engagement' that an issue-centered science shop may envisage and enact. Different participatory devices are based on different 166 Revealing the politics contained in apparently scientific or technical questions as well as the technoscience contained in politics (Barry, 2001), the analysis of controversies allows partially reconstructing the chains created between the politics of knowledge or design and policy making (see chapter one).…”