A chronicle of controversies over testing (heredity-environment, experimenter bias, social class bias, tests as sorters for schools and society) and the difficulties that ensue when the scholar enters the arena of public policy. The thesis is offered that the hearing given to social evidence and issues depends on the times and the audience, with…

A longitudinal program of workshop-centered rehabilitation services was administered to mentally retarded adolescents. Results with the 36 remaining at the end of the 3rd year indicated that most characteristics central to vocational development were stable by early adolesence; a "competence cluster" of variables covaried systematically; high and…