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Research on Down syndrome continues to support the closure of institutions.

Date: 1979

The Story of Disability Justice
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Research describes the impact of stimulation on infants and children with Down syndrome and compares the IQs of children raised in institutions versus those raised at home.

Children with Down syndrome raised in institutions have an average IQ of 20-30, while those raised at home with no specific attention to stimulation average about 40. Those raised at home with attention to stimulation have an average IQ of 55.