1. One attempt at a renewed defense of the objective standard for the mentally ill is found in Alexander & Szasz, supra note 19. The authors base their defense upon a theory of moral responsibility. Whatever its attractiveness in cases involving the mentally ill, it would probably find less acceptance in cases involving the mentally retarded.
2. See generally Wolf Wolfensberger, The Principle of Normalization in Human Services (Toronto: National Institute on Mental Retardation, 1972).
3. It is also used, of course, with mentally retarded children. Thus a child with a chronological age of 12 may be said to have a mental age of 3.
4. Robinson & Robinson, supra note 64. See also Frank J. Menolascino, ed., Psychiatric Approaches to Mental Retardation 717–19 (New York: Basic Books, Inc., 1970).
5. American Law Institute, Model Penal Code § 4.01(2) (Proposed Official Draft, 1962); but see Wade v. United States, 426 F.2d 64 (9th Cir. 1970).