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intelligence quotient

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intelligence quotient

–noun Psychology.
an intelligence test score that is obtained by dividing mental age, which reflects the age-graded level of performance as derived from population norms, by chronological age and multiplying by 100: a score of 100 thus indicates a performance at exactly the normal level for that age group. Abbreviation: IQ


Origin:
1920–25
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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intelligence quotient  
n.   Abbr. IQ
The ratio of tested mental age to chronological age, usually expressed as a quotient multiplied by 100.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: intelligence quotient
Function: noun
: a number used to express the apparent relative intelligence of a person that is the ratio multiplied by 100 of themental age as reported on a standardized test to the chronological age called also IQ
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

intelligence quotient n.
Abbr. IQ, I.Q.
An index of measured intelligence expressed as the ratio of tested mental age to chronological age, multiplied by 100.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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