The 1950s and 1960s: The Medical Model Prevails.
A New Perspective Develops.
The 1970s: Developmental Disabilities. Millions Cured by Redefinition.
A Functional Definition. People First.
The 1980s: A Growing Emphasis on Capacity.
Understanding the Impact of the Environment.
The 1990s and the New Century: The Legislation Broadens.
