“…Binet, on numerous occasions, underlined the fact that his scale was designed only for clinical purposes, as a way to compare the individual's mental age with their chronological age on the basis of a structured study of a sample of individuals of the same age. Along these lines, the intelligence of an abnormal child could also be "educated" and transformed by means of exercises suitable for the reentry of the abnormal child into society, beginning with the institutionalization of the "abnormality" by means of "classes de perfectionnement" or "differential classes," in which the reeducation process would take place (Binet & Simon, 1907; see also Foschi & Cicciola, 2006). It remains true, however, that of the test's three categories of abnormalities-idiot, imbecile, weak of mind-in the end, only the last category, characterized by the mildest dis turbances, could effectively benefit from psy cho-pedagogical interventions.…”