Mild mental retardation and severe mental retardation compared: experiences in eight less developed countries.


Frequencies of Severe Mental Retardation (SMR) and Mild Mental Retardation (MMR) were obtained from pilot surveys of severe childhood disability in 8 less developed countries. Approximately 1,000 children aged 3 to 9 years were surveyed in each location. The surveys used a Ten Question (TQ) door-to-door interview, usually of the mother, as a screening… (More)


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