What is an intellectual disability (formerly referred to as mental retardation)?
An intellectual disability is generally thought to be present if an individual has an Intelligence Quotient (IQ) test score of approximately 70 or below (AAMR, 2002). Intelligence refers to a general mental capability. It involves the ability to reason, plan, solve problems, think abstractly, comprehend complex ideas, learn quickly, and learn from experience. IQ scores are determined from standardized tests given by trained professionals.