The correct term for mental disability is "intellectual disability," a diagnosis characterized by significant limitations in intellectual functioning and adaptive behavior. This term replaced outdated labels like "mental retardation" in clinical and legal contexts.
Intellectual disability involves limitations in reasoning, problem-solving, and conceptual understanding, along with challenges in daily living skills. The American Association on Intellectual and Developmental Disabilities (AAIDD) defines it as originating before age 22, with impacts on three areas: intellectual functioning, adaptive behavior, and skills needed for independent living.
| Type | Description | Common Causes |
|---|---|---|
| Mild | Can learn basic life skills, may need minimal support | Unknown (often genetic) |
| Moderate | May require moderate support for daily activities | Premature birth, infections |
| Severe | Requires substantial support for most activities | Traumatic brain injury, metabolic disorders |
| Profound | Needs very frequent support for all activities | Genetic syndromes (e.g., Down syndrome) |
Many confuse intellectual disability with other conditions. Unlike autism spectrum disorder, intellectual disability is strictly about cognitive and adaptive impairments. Developmental disabilities (e.g., cerebral palsy) may coexist but are distinct. Mental illness (e.g., schizophrenia) is unrelated, though comorbidities exist.
In 2010, the U.S. passed Rosa's Law, replacing "mental retardation" with "intellectual disability" in federal health and education programs. The law was inspired by a Maryland girl whose brother had Down syndrome. This shift reflects evolving societal attitudes toward respectful, accurate language.
Use "intellectual disability" in formal settings (medical, legal, educational). In informal contexts, ask individuals their preference. Avoid euphemisms like "special needs" unless the person uses them. For historical references, use the term from that era, but clarify its outdated nature.