Intellectual Disability: A person diagnosed as intellectually disabled exhibits significantly sub-average intellectual functioning concurrently with deficits in adaptive behavior manifested before age 22. Significantly sub-average is defined as having an IQ of 70 or below, based on standardized measures of intelligence.
Related conditions: A person with a related condition lives with a severe, chronic disability that meets all of the following criteria:
- It is attributable to Cerebral Palsy or Epilepsy or any other condition other than mental illness, found to be closely related to intellectual disability because this condition results in impairment of general intellectual functioning or adaptive behavior similar to that of a person with intellectual disability and requires treatment or services similar to those required by a person with intellectual disability.
- It is manifested before the person reaches the age of 22;
- It is likely to continue indefinitely;
- It results in substantial functioning limitations in three or more of the following areas of major life activity:
- Understanding and use of language
- Capacity for independent living