The purposes of this report are to provide: (1) an overview of the Wood County, Wisconsin Project methodology, including a description of the experimental and control areas, the research design, and the instrumentation used to assess the impact of services; and (2) a description of the client populations in terms of selected pre-rehabilitation demographic variables and other information. This project is the first large-scale attempt to examine the feasibility of and guidelines for the expansion of rehabilitation to serve not only the medically disabled but also the culturally disadvantaged. It was discovered that certain characteristics differentiated the culturally disadvantaged clients from other subgroups: (1) sex; (2) age; (3) source of referral; (4) marital status; (5) onset of disability; (6) automobile licensing and possession; (7) employment status; (8) highest grade completed; and (9) educational achievement. (TL)