Considering median and large group settings, by Gabriele Profita, Giuseppe RuvoloOn the basis of long experience in median and large groups in various social and institutionalcontexts, the authors expound the main conceptual references that are necessary toplan and develop the settings of these group formats. On one side, these references are constitutedby the epistemological awareness of the sociocultural level of the psychic and relationalprocesses that occur within these groups. On the other, they are based on the need toconsider the institutional context in which they take shape, on the identification of specificcultural themes and, eventually, on the choice of defined methodological parameters relatedto the objectives that every setting aims to achieve. The entirety of these epistemological andmethodological references has led the authors to formulate a work model that they have denominatedtransit group, which is potentially applicable to every context in social and institutionallife.Key words: Median groups, large groups, transit group.