This document provides information on mental retardation and developmental disorders. It discusses:
1) The diagnostic criteria for mental retardation including low intellectual functioning (IQ less than or equal to 70) and deficits in at least two domains of adaptive behavior.
2) The ranges of mental retardation from mild to profound and the characteristics of each.
3) Common causes of mental retardation including genetic conditions like Down syndrome and environmental factors like problems during gestation or delivery.
4) Treatments for mental retardation including education, behavioral treatment, and parent training.