The challenge of extending supported employment to more people with severe disabilities, however, remained a challenge. In 1991, the research outlined the nature of the problem. Supported employment programs served only a percentage of the population who could benefit from them. A national survey of day and employment programs found that individuals with severe developmental disabilities, cerebral palsy, and epilepsy accounted for less than 20% of all the people with disabilities receiving supported employment, work adjustment, and on-the-job training services from state VR agencies.
(Kiernan, McGaughey, Lynch, Schalock, & McNally, 1991).