This article is based on research that documents Quebec expertise in collective intervention based on the biographical accounts of 12 professionals with structuring achievements to their credit, as well as a solid capacity for analysis and critical thinking. We will analyse the effect of the approach on the objectification of the pathways by the subjects, as well as the nature of the subject-researcher relationships, and the methodological and ethical issues inherent in the "clinical posture". The recursion of the process, where the contribution of the analysis of the subject on his own journey is combined with the factual and analytical reframing of the researcher, poses methodological and ethical challenges that we explore.