Examines how groups representing children with Attention Deficit Hyperactivity Disorder (ADHD) in France and Ireland engage within this contested medical domain, and challenges the frequently made association between the process of medicalisation and de-politicisation.

Presents the results and methodology of a set of investigation on mailing lists and online forums.

Shows that how knowledge-related activities are central to activism in childbirth organization, comparing the UK, Ireland, Portugal and France.

Examines the changing roles of science exhibitions from places of 'cold' science, where secure, closed and fixed knowledge is communicated, to places that increasingly engage with 'hot', controversial research and open debates.

Comments on the potentials of the notion of "experimentation" as a vehicule for the renewal of the theoretical repertoire of political sociology.

Develops and discusses a theoretical framework for the study of taste from a pragmatist point of view.

Transcribes a dialogue on the evolution of actor-network theory.

Highlights the emergence of a "hybrid collective model" of collaboration between patients and experts through a systematic study in the field of rare diseases in France and Portugal, with attention to the reflexive work carried out by patients' organizations on the notion of rareness.