Intelligence Quotient (IQ): IQ is a measure of an individual's cognitive abilities relative to others of the same age group. It can provide insight into the severity of mental retardation.
Adaptive Behaviors: Adaptive behaviors refer to the skills necessary for daily living, such as communication, self-care, and social interactions. Difficulties in these areas are often observed in individuals with mental retardation.
Down Syndrome: Down syndrome is a genetic disorder that causes intellectual disabilities and physical characteristics such as slanted eyes and a flattened facial profile. It is one example of a condition associated with mental retardation.