Intellectual functioning disability, or intellectual disability, is a condition characterized by limitations in a person’s ability to think, learn, and understand. These limitations can affect everyday tasks, communication, and self-care. The condition usually starts before age 18 and can vary in its impact on different individuals. It is often assessed by measuring intelligence quotient (IQ) and adaptive functioning skills, like communication and daily living activities. Support and interventions are tailored to an individual’s needs, promoting their overall well-being and helping them lead fulfilling lives.