Lawler, Robert W.; GTE Laboratories Inc., Etats-Unis > Fundamental Research Laboratory
Canale, Michael; Ontarion Institute for Studies in Education, Canada
Purves, Alan C.; Université d'Illinois, Etats-Unis > Curriculum Laboratory
Rubin, Andee; BBN Laboratories Inc., Etats-Unis > Education Department
Foucambert, Jean; Institut national de la recherche pé"dagogique, France
Lundberg, Ingvar; Université
Aarnouste, Cor A.J.; Université catholique, Pays-Bas > Institute for educational sciences
Mommers, Martin J.C.; Université catholique, Pays-Bas > Institute for educational sciences