The curricular approach of a training process in its hidden dimension makes it possible to propose here an original methodology of longitudinal research aiming at connecting the characteristics of a curriculum of formation for nonprofessional animator and the maturation of the adolescent looking for his adult identity considered with a dynamic point of view. A statistical analysis work by comparisons of averages and principal component analyses based on the answers to a Likert ́s scale type questionnaire allows to show an evolution regarding the intensity of the selected items and regarding the structure of the social representations of the animator approached in this way. We can see then, that the social representations of the young trainees evolve, coming gradually off the effects of social desirability and structure oneself in a coherent and shared way. The self-image becomes increasingly positive, the capacities of formal reasoning are better used and the emotional components are left behind. The interest of this longitudinal approach is that it enables to locate stages in the curriculum of formation and to approach the central point of the device, to work out the researched implicit effects, to touch at the same time the interiority of the subjects and the interiority of the device.