# intelligence quotient

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## intelligence quotient

a measure of the intelligence of an individual derived from results obtained from specially designed tests. The quotient is traditionally derived by dividing an individual's mental age by his chronological age and multiplying the result by 100

## intelligence quotient (IQ)

a unit used in the field of INTELLIGENCE measurement and testing as an index of an individual's intelligence relative to a comparable population with respect to age. A ratio IQ is the IQ expressed as a ratio of mental age (as measured by a test) to chronological age, and multiplied by 100 to avoid decimals:

The average child at any one chronological age will therefore score 100 on the appropriate set of IQ test items. This was the original IQ measure first used in 1916 in the Stanford-Binet Test.

Modern tests make use of standard scores, which express the individual's distance from the mean in terms of the standard deviation, and assume a normal distribution. In a variant of this, the deviation IQ, the mean is 100 and a standard deviation of 15 or 16 is usual.

It is important to note the difference between these measures, since the deviation IQ is not a ratio of mental age to chronological age, and the measured IQs derived from it will depend on the standard deviation used in the test. see also INTELLIGENCE TEST.

## intelligence quotient

[in′tel·ə·jəns ‚kwōsh·ənt]
(psychology)
The numerical designation for intelligence expressed as a ratio of an individual's performance on a standardized test to the average performance according to age. Abbreviated IQ.
References in periodicals archive ?
Companies with a high Emotional Intelligent Quotient (EIQ) are best able to protect themselves from Google-gratification because they have the ability to modify their responses to fit consumers and empathize with their opponents.
Over a third of those tested had the intelligent quotient of a genius and the results of the study were so shocking that similar surveys were held in Europe and United States - with the same outcomes.
Assessment found Angela to have a high average Intelligent Quotient.
6) These impressionable traits include youthfulness, a low or borderline intelligent quotient (IQ), mental handicap, psychological inadequacy, recent bereavement, language barrier, alcohol or other drug withdrawal, illiteracy, fatigue, social isolation, or inexperience with the criminal justice system.
The Ministry of Education, Culture, Sports, Science and Technology decided to allow various types of tests, including interviews and behavior observation, as it is becoming difficult to measure intelligent quotient (IQ) by conventional written tests, the officials said.

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