2. It Includes Intellectual Disabilities
Merck Manuals explains that the term intellectual disability (which replaces the outdated “mental retardation”) is categorized by an IQ of less than 70 to 75, combined with problems with communication, self-direction, social skills, and “maintenance of personal safety.”
Children affected by this neurodevelopmental disorder will be diagnosed based on their ability to adapt to age and social-specific standards of independent functioning, and will also show signs of barriers to learning, problem-solving, and abstract thinking. Some children will not show signs of a disability until preschool age, it adds.