An intellectual disability is a type of developmental disability

Intellectual and/or developmental disabilities are also known as I/DD.  These are large umbrella terms that can cover many other disabilities. Generally, living with I/DD means that a person has experienced impacts on their ability to:

  • Learn
  • Reason
  • Problem-solve
  • Live independently

The technical definition of intellectual and developmental disability in Colorado is:

“Intellectual and developmental disability” means a disability that manifests before the person reaches twenty-two years of age, that constitutes a substantial disability to the affected person, and that is attributable to an intellectual and developmental disability or related conditions, including Prader-Willi syndrome, cerebral palsy, epilepsy, autism, or other neurological conditions when the condition or conditions result in impairment of general intellectual functioning or adaptive behavior similar to that of a person with an intellectual and developmental disability.

(b)  “Person with an intellectual and developmental disability” means a person determined by a community-centered board to have an intellectual and developmental disability and includes a child with a developmental delay.

(c)  “Child with a developmental delay” means:

(I)  A person less than five years of age with delayed development as defined by rule of the state board; or
(II) A person less than five years of age who is at risk of having an intellectual and developmental disability as defined by rule of the state board.

List of Potential Intellectual and/or Developmental Disabilities:

It’s important to note that not everyone who lives with a diagnosis listed below would be considered to have an intellectual or developmental disability.  We provide this list as a resource to guardians or individuals who may wonder if they qualify for our advocacy services.  The bottom line is that we strive to help anyone who needs it.  If we determine that we are not the best agency to assist you, we will work hard to find another resource.  No matter what, you will not receive a bill for our help.

  • ADHD
  • Apert Syndrome
  • Autism
  • Cerebral Palsy
  • Developmental Delay
  • Developmental Hearing Loss
  • Down Syndrome
  • Fetal Alcohol Spectrum Disorder
  • Fragile X Syndrome
  • Kernicterus
  • Language and Speech Disorders
  • Learning Disorders
  • Prader-Willi
  • Phenylketonuria (PKU)
  • Muscular Dystrophy
  • Tourette Syndrome
  • Vision Impairment
  • Williams Syndrome

Understanding I/DD

Intellectual and developmental disabilities (I/DD) are disorders that begin in childhood. They have many causes and symptoms.

Intellectual disabilities are disorders that involve difficulties in intellectual functioning and adaptive behavior and begin before the age of 18. Intellectual functioning involves mental tasks such as learning, reasoning, problem-solving, and so on. It is assessed using an IQ test and is measured in terms of mild, moderate, or severe[1]. Adaptive behavior includes conceptual, social, and practical skills. People who struggle with adaptive behavior may show difficulties with literacy, money management, schedules and time, interpersonal relationships, daily personal care activities, and more [2].

Developmental disability is a broad term that encompasses intellectual disabilities and other lifelong disabilities that begin in childhood before age 22. Developmental disabilities affect intellectual functioning, physical functioning, or both [3]. Examples include Down syndrome, Autism Spectrum Disorder, cerebral palsy, Fragile X Syndrome, and more [4]. Someone with a developmental disability may or may not also have an intellectual disability. Some developmental disabilities may be diagnosed before or shortly after birth, and others may not be diagnosed until later in childhood. Developmental monitoring and screening by a pediatrician can assess whether or not your child is reaching developmental milestones as expected.

Fact Sheets and Frequently Asked Questions

The Centers for Disease Control and Prevention provide a fact sheet on intellectual disabilities in English and Español

The Centers for Disease Control and Prevention provide information on developmental disabilities, including developmental milestones and developmental monitoring and screening. This information is also available en Español. 

The Arc offers an introduction to intellectual disability

Other Resources

Your local Children’s Developmental Services Agency coordinates early intervention services for infants and toddlers up to age 3 who have special needs. 

Alliance Health offers a list of links to I/DD resources in various areas of North Carolina. 

Advocacy and Social Connections

The Arc runs a public policy and legal advocacy page with toolkits and fact sheets to inform people about Medicaid, the Affordable Care Act, and Social Security. 

The North Carolina Council on Developmental Disabilities works to involve people with I/DD and their families in legislative and public policy advocacy.

Wake Network of Care offers a list of links to social and recreational programs for people with I/DD in Wake County and surrounding areas. 

References

What is an intellectual/developmental disability?

What is IDD? An intellectual or developmental disability, also called IDD, includes many severe, chronic conditions that are due to mental and/or physical impairments. IDD can begin at any time, up to 22 years of age. It usually lasts throughout a person's lifetime.

What type of disorder is intellectual disability?

Intellectual disability 1 involves problems with general mental abilities that affect functioning in two areas: Intellectual functioning (such as learning, problem solving, judgement). Adaptive functioning (activities of daily life such as communication and independent living).

What is the difference between intellectual and developmental?

The term “developmental disability” is used to encompass intellectual disabilities as well as physical disabilities. Some of these disabilities are solely physical, like blindness, while others are both physical and intellectual disabilities that stem from genetic causes.

What is considered a developmental disability?

Developmental disabilities are a group of conditions due to an impairment in physical, learning, language, or behavior areas. These conditions begin during the developmental period, may impact day-to-day functioning, and usually last throughout a person's lifetime.