1 This book is the product of a one-year project conducted by the Hastings Center, Institute of Society, Ethics and the Life Sciences, during 1976-1977. The Behavior Control Research Group-an ongoing, interdisciplinary working group com- posed of philosophers, psychiatrists, psychologists, social sci- entists, and lawyers-met four times over the course of the year with special consultants with expertise in the field of mental retardation. At those meetings, participants gave in- formal presentations, which were followed by group discus- sion. As the project progressed, formal papers were delivered and subjected to further critical commentary. This volume, in two related parts, represents the deliberations of the group as a whole, and then offers individual papers prepared by some scholars in order to give a sense of the kind of specific arguments on which the general conclusions were based. We undertook the project to examine: (1) questions of competence and consent; and (2) the practical implications, l The project, entitled "Ethical Issues in the Care and Treatment of the Mildly Mentally Retarded, " was supported by the EVI5T program of the National Science Foundation under Grant No. 05576-14793. Any Opinions, findings, conclusions, or recommendations expressed herein are those of the authors and do not necessarily reflect the views of the National Science Foundation. ix x PREFACE in terms of care and treatment, that evolve from differing definitions and models applied to mental retardation.