Our research is part of a developmental approach to psychopathology. We focus in particular on the study of the processes underlying trajectories of the typical and atypical psychological development of the child and the adolescent, based on a prospective and longitudinal methodology. These works aim at a better apprehension of the psychological suffering, and specifically to identify the risk factors and conversion to the psychopathology, but also the protective factors supporting the resilience in the face of the adversity.