Reserved for invited researchers, the afternoon will take the form of a collective workshop focused on methodological issues related to assessing well-being in a language context: defining the objects of study, selecting relevant indicators, the respective role of self- and other-assessments, articulating reported, interactional, and observational data, and adapting tools to the ages, contexts, and profiles studied. The day will conclude with a prospective discussion devoted to the possibilities of structuring an interdisciplinary network or working group around these issues.