Download or read book Mental Retardation Research Advances written by Elizabeth B. Heinz and published by Nova Publishers. This book was released on 2007 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mental retardation is a term for a pattern of persistently slow learning of basic motor and language skills ("milestones") during childhood, and a significantly below-normal global intellectual capacity as an adult. One common criterion for diagnosis of mental retardation is a tested intelligence quotient (IQ) of 70 or below. This book presents leading-edge research from around the world.