This document, written for authorization to manage PhD students, presents a synthetic overview of activities carried out during my PhD thesis and after in my missions of teacher-researcher at the university of Toulouse Jean Jaurès. It is chronologically organized in three parts. The first part returns on my doctoral path as well as on the works I led concerning the episodes of misunderstanding, which occur in the beginning of lessons. A biographical approach is mobilized. It describes the conditions of emergence of themes, which occupy an important position in my researches: so as the questions of emancipation and change management. The second part reports productions relative to the professionalization in the field of health, to transmission of standards and values in vocational training, to construction of professionalism. It analyzes the way a number of changes (hospital reform, reengineering of training, neo-evaluation) affects these processes. The constitution of change as an object of research is then highlighted, as well as the epistemological and theoretical issue bound to the modes of change management. Having clarified the selected approach of the change and specified the process of intervention-research, which I implement, the third part of this text is dedicated to the epistemological principles basing a scientific change management. Then, it is discussed the research project I intend to manage. Concerning the countercultural approach of the emancipation, which I intend to characterize, this one rests on the hypothesis according to which the capacity of mobilization of countercultural works would favor the emancipation of the actors. This project aims at studying the way a scientific change management could use this countercultural resource in a purpose of emancipation. The model of the “éridostrakon” is explained and discussed. The document ends with the identification of the skills, which were able to be developed through various professional situations. I discuss these skills with the prospect of researches management.