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Broadening of the "Developmental Period"

Looking Ahead Booklet
Looking Ahead Booklet

In 1983 the AAMR expanded the definition of the developmental period from conception to age 18 (Grossman 1983 cited by Smith 382). This meant that persons with mental retardation resulting from prenatal factors were made eligible for services.

In the 1984 amendments to the Developmental Disabilities Act extended the upper age of onset to 22 years.