Mental retardation and learning disabilities: conceptual and applied issues.

The relationship between mental retardation and learning disabilities is clouded by conceptual issues and current practices in applied (i.e., educational and noneducational) settings. In this article, we initially discuss whether mental retardation can be considered a concomitant disability associated with learning disabilities or whether these two disabilities are mutually exclusive categories. Conceptual issues related to this question are then reviewed to provide a perspective for viewing these two traditional areas of exceptionality. Emerging areas of concern in term of definition, classification, etiology, and lifelong issues are addressed. Attention is then given to applied issues that have a direct effect on the lives of individuals with disabilities. Specific topics include educational curricula, instruction, inclusion, and adult services and supports.