Mental retardation

Content provided by Healthwise

Mental retardation

Mental retardation refers to below-average intelligence. The diagnosis of mental retardation is based on intelligence quotient (IQ) tests and a child's learning problems.

Mental retardation is categorized according to IQ scores:

In mild retardation, IQs range from 50 or 55 to 70.
In moderate retardation, IQs range from 35 or 40 to 50 or 55.
In severe retardation, IQs range from 20 or 25 to 35 or 40.
In profound retardation, IQs are below 20 or 25.

Most people with mental retardation have mild retardation. Very few have severe or profound mental retardation.

Children with mental retardation may have difficulty with:

Learning, especially complex tasks.
Language. Children with severe mental retardation have more difficulty learning language than children with mild to moderate mental retardation.
Self-care (in cases of severe mental retardation).

Credits

Author	Jeannette Curtis
Author	Caroline Rea, RN, BS, MS
Editor	Kathleen M. Ariss, MS
Editor	Susan Van Houten, RN, BSN, MBA
Associate Editor	Tracy Landauer
Associate Editor	Pat Truman
Primary Medical Reviewer	Patrice Burgess, MD - Family Medicine
Primary Medical Reviewer	Adam Husney, MD - Family Medicine
Primary Medical Reviewer	Kathleen Romito, MD - Family Medicine
Last Updated	May 25, 2007

Last updated:	May 25, 2007
Author:	Caroline Rea, RN, BS, MS
Reviewed By:	Kathleen Romito, MD - Family Medicine
Editors:	Susan Van Houten, RN, BSN, MBA, Pat Truman

This information is not intended to replace the advice of a doctor. By using AOL Body, you indicate that you have read, understood, and agreed to our Terms of Service, and AOL Body Advertising Policy. Read more about our content partners.