Also called intellectual disabilities - are characterized by significant impairments in intellectual skills and in daily living skills. Developmental disabilities can be present at birth or have an onset during childhood.
The American Association on Intellectual and Developmental Disabilities is a leading professional organization dedicated to supporting people with intellectual and developmental disabilities. They offer comprehensive information about the definition of intellectual disabilities.
Developmental Disabilities can have many causes, including genetic or environmental causes, diseases, or, in rare instances, birth trauma or traumatic brain injury early in life. For some developmental disabilities the causes are not yet well understood.