Intellectual Disability, Mild

Persons diagnosed with an intellectual disability are a heterogeneous group in terms of functioning. In fact, the classification of severity of intellectual disability has shifted from an emphasis on intellect to adaptive functioning, redefining this diagnostic group. Individuals with a mild intellectual disability, compared with other levels of severity, are most likely to live and function independently with fewer supports in place. Understanding the diagnostic complexities and developmental trajectory is critical to supporting individuals with a mild intellectual disability as they transition to adulthood. This entry examines the diagnosis, development, and treatment of individuals with a mild intellectual disability.