Lecture given at the AFPSA – SFPS workshop, October 13, Psychology Department, Université de Bordeaux titled “Enjeux et défis de l’évaluation des prises en charge non médicamenteuses: recherche et intervention auprès de groupes restreints” (French). It is readily admitted that the health benefit of psychotherapy or a health prevention program depends on the professional, the participant and the context. The […]