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Severe Intellectual Disability

Scope Note: 
Intellectual functioning that is more than four standard deviations below the mean (usually below 40 IQ range), concurrent with adaptive deficiencies -- individuals with a severe intellectual disability require continual supervision and care. Prior to 2015, "Severe Mental Retardation" was used to index this concept.
Category: Disabilities
Broader Terms
Intellectual Disability
Severe Disabilities
Narrower Terms
Use this term instead of
Custodial Mentally Handicapped (1968 1980)
Profoundly Mentally Retarded
Severe Mental Retardation
Related Terms
Mild Intellectual Disability
Moderate Intellectual Disability
Residential Care
Added to ERIC: 9/4/2015