WHAT IS INTELLIGENCE?

Intelligence refers to general mental capability. Usually it involves the ability to reason, plan, solve problems, think abstractly, comprehend complex ideas, learn quickly, and learn from experiences which are observed by the person who is under review. Although not perfect, intelligence is represented by Intelligent Quotient (IQ) scores obtained from standardized tests given by a trained professional. In regard to the intellectual criterion for the diagnosis of mental retardation, mental retardation is generally thought to be present if an individual has an IQ test score of approximately 70 or below. An obtained IQ score must always be considered in light of its standard error of measurement, appropriateness and consistency with administration guidelines. Since the standard error of measurement for most IQ tests is approximately 5, the ceiling may go up to 75. This represents a score approximately 2 standard deviations below the mean, considering the standard error of measurement. It is important to remember, however, that an IQ score is only one aspect in determining if a person has mental retardation. Significant limitations in adaptive behavior skills and evidence that the disability was present before age 18 are two additional elements that are critical in determining if a person has mental retardation.