The Research Group on Interaction and Educational Influence (GRINTIE) belongs to the Department of Cognition, Development and Educational Psychology at the University of Barcelona (Spain). Since the beginning of its activities, at the end of the eighties, the group is led by Dr. César Coll. Since 1995, GRINTIE is part of the group Development, interaction and communication in educational contexts. The quality of the research activities of this group has been recognized by the Department of Universities, Research and Information Society of the Generalitat of Catalunya. In recent years the group has developed several research projects with other groups and researchers from the Autonomous University of Madrid, the University of Extremadura, the University of Girona and the National Autonomous University of Mexico.