My career is based on the optimization of human interaction in the service of learning. Specialized in applied cognitive science, I understand the human being as an "architecture" that works through neurological, cognitive and social-cognitive processes that have dynamic links between them. Overall, my research has contributed to the understanding of the opportunities and limits of the learner when he/she is placed, individually or as a team, in learning situations involving very complex processes supported by complex knowledge in the areas of statistics, the teaching of reading and physics. These learning contexts involve from time to time the use of technologies, including tutoring systems.