What Is Intellectual Disability?
Intellectual disability (ID) is characterized by significant limitations in intellectual functioning (IQ below ~70) and adaptive behavior (practical, social, and conceptual skills), originating before age 18.
Previously called "mental retardation" (a term now considered offensive and outdated in professional use), ID ranges from mild to profound. Approximately 1–3% of the Indian population has intellectual disability.
ID commonly co-occurs with autism (approximately 40% of autistic people have co-occurring ID), cerebral palsy, Down syndrome, and other neurodevelopmental conditions.
Signs by Development Stage
Infant/toddler: Significant delay in achieving motor milestones (sitting, walking), delayed first words, limited response to environment.
Preschool: Delayed play skills, limited language, difficulty learning self-care (toilet training, dressing), needs more support than typical peers.
School-age: Academic learning is significantly below grade level, difficulty understanding abstract concepts, slower new learning.
Diagnosis in India
Diagnosis requires: standardized IQ assessment by psychologist + adaptive behavior assessment + documentation that difficulties originated in childhood.
Government centers (NIMH, NIMHANS, AIIMS) and RCI-registered clinical psychologists can assess.
Levels: Mild (IQ 55–70), Moderate (IQ 40–55), Severe (IQ 25–40), Profound (IQ below 25).
Rights and Support
ID is recognized under RPWD Act 2016, qualifying for all disability-related government benefits including UDID, RTE provisions, NHFDC, and disability pensions.
Adults with mild-moderate ID can often work in supported employment settings and live semi-independently with support.