Note 26 — Front matter

The term "feeble-minded" may be used generally to cover all degrees of mental weakness. In speaking a little more precisely, however, we have to recognize three main degrees of congenital mental weakness: feeble-mindedness, in which with care and supervision it is possible to work and earn a livelihood; imbecility, in which the subject is barely able to look after himself, and sometimes only has enough intelligence to be mischievous (the moral imbecile); and idiocy, the lowest depth of all, in which the subject has no intelligence and no ability to look after himself. More elaborate classifications are sometimes proposed. The method of Binet and Simon renders possible a fairly exact measurement of feeble-mindedness.