form (who participates and how) and the function (why and to which ends does s/he participate).1 Based on this 1 Often involving social scientists, organiz- ers are, of course, also important actors; or- [...] 2009: 19-35 Ta bl e 1: T yp ol og y o f p ar ti ci pa to ry t ec h n o lo gy a ss es sm en t pr oc ed u re s – N um be r an d h et er og en ei ty o f p ar ti ci pa n ts + Ty pe 1 D ia lo gu e pr oc ed [...] ticipants), our typology identifies seven different models (cf. table 1). We can specify four principal groups of partici- pants: 1. lay people (often also called the gen- eral public); 2. interest groups …