(en) When confronted with one another, people will quickly establish a set of habits, rituals, norms, in other words a set of communication rules that allow them to live or work together without wasting time continuously redefining the specifics of their interaction. When people from various horizons are pooled together for a single short project, those communication rules may come to a blur. Many variables affect what we shall call, following in a number of authors such as Winkin, the "communication partition" - the said partition evolving along as interactions occur. Throughout the present work, we asked ourselves in which manner that communication partition was to emerge as exchange processes took place, and which variables would affect its construction. We chose to anchor our reflection in a pratical-oriented approach. We dealt with research workshops gathering professionals from health and/or social work backgrounds, as well as researchers and scholars from miscellaneous fields. Analysis of our results allows us to come to a number of conclusions about the way the communication partition settles in within a mixed group when communication rules are challenged. Pushing beyond the specific field submitted to our analysis, we shall suggest a more general model, the which we propose to put to the test empirically through further research.