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 ?
Probably because the last few people to tell him something he didn't want to hear ended up getting sacked or challenged to an IQ test.
11 ( ANI ): White House press secretary Sarah Huckabee Sanders has said that President Donald Trump was joking when he had challenged Secretary of State Rex Tillerson to a competitive IQ test.
To qualify for gifted status, students generally had to score at least 130 on the IQ test.
In closing, the Supreme Court stated that a bright-line cutoff rule "is in direct opposition to the views of those who design, administer, and interpret the IQ test.
After a lengthy trial in 1979 Judge Peckham permanently prohibited the use of IQ testing for placing African-American students in classes for EMR or "their substantial equivalent" after concluding that IQ tests were racially and culturally biased, and thus were responsible for the disproportionate placement of AfricanAmerican students in dead-end classes (Larry P.
This is a shame because Flynn is a man who, despite involvement in 'left-wing' political causes, risks provoking the fury of those very people with whom he sympathizes by defending IQ tests and highlighting -though not in this book--dysgenics (New Zealand Herald, 8 July 2007).
Psychiatrists and psychologists who are supporting Hall also say that an IQ test alone is insufficient for a diagnosis of mental disability.
Prof Flynn collated IQ test results from countries in western Europe, America, Canada, New Zealand, Argentina and Estonia.
Flynn collected IQ test results from the United States, Canada, New Zealand, Argentina and Estonia, the (http://www.
Getting a high score in an IQ test requires both high intelligence and competitive tendencies to motivate the testtaker to perform to the best of their ability.
This is important for understanding the meaning of the IQ score, especially if your child has a series of IQ tests over her school years.
Together, Points 1 and 2 provide further evidence that cross-country IQ tests are valid predictors of worker productivity.