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 ?
Judge Peckham granted the plaintiff's motion for a preliminary injunction that enjoined the use of any standardized IQ tests for the identification of Black EMR children or their placement into EMR classes without receiving prior approval of the court.
Simply put, IQ tests are not a perfect measure of a person's intellectual ability,'' Hall's lawyers told the court in written arguments.
According to statistics of Mensa Bulgaria, half of the candidates pass the IQ test threshold, which is a good score, according to Boyan Aleksandrov, member of the board of directors of the organization.
To reserve a place on the test book online by visiting the IQ Test section of the Mensa website at www.
While several IQ test prep companies cater to the New York City market, Test Tutor Publishing's aim is to meet the unique needs of parents in urban, suburban and even rural areas across the county.
An IQ test may be useful for setting general expectations for classroom performance, but it is not the final word on a child's ability.
1988) gave more than 3,000 Brazilian children the Raven's Colored Progressive Matrices test (a simple multiple-choice visual IQ test, but a powerful predictor of overall IQ).
Nisbett tells us that general intelligence exists, that it can be reliably measured by IQ tests, and that scores on such tests help to predict success in school and at work.
Jonathan Kay, from Castle Bromwlch said, "IQ tests cost so much money and It can stop people like me from taking part In some sports because you need an IQ test to be registered.
com is an online dating and networking community which requires that its members pass an IQ test in order to join.
Unlike most individuals, children and adults diagnosed as autistic often score much higher on a challenging, nonverbal test of abstract reasoning than they do on a standard IQ test, say psychologist Lanrent Mottron of Hopital Riviere-des-Prairies in Montreal and his colleagues.
For further information, and a Home IQ Test, call 0800 05 63672 or click on www.