An intelligence quotient (IQ) is a total score derived from a set of standardized tests or subtests designed to assess human intelligence. The abbreviation "IQ" was coined by the psychologist William Stern for the German term Intelligenzquotient, his term for a scoring method for intelligence tests at University of Breslau he advocated in a 1912 book.Historically, IQ was a score obtained by dividing a person's mental age score, obtained by administering an intelligence test, by the person's chronological age, both expressed in terms of years and months. The resulting fraction (quotient) was multiplied by 100 to obtain the IQ score. For modern IQ tests, the raw score is transformed to a normal distribution with mean 100 and standard deviation 15. This results in approximately two-thirds of the population scoring between IQ 85 and IQ 115 and about 2.5 percent each above 130 and below 70.Scores from intelligence tests are estimates of intelligence. Unlike, for example, distance and mass, a concrete measure of intelligence cannot be achieved given the abstract nature of the concept of "intelligence". IQ scores have been shown to be associated with such factors as nutrition, parental socioeconomic status, morbidity and mortality, parental social status, and perinatal environment. While the heritability of IQ has been investigated for nearly a century, there is still debate about the significance of heritability estimates and the mechanisms of inheritance.IQ scores are used for educational placement, assessment of intellectual disability, and evaluating job applicants. In research contexts, they have been studied as predictors of job performance and income. They are also used to study distributions of psychometric intelligence in populations and the correlations between it and other variables. Raw scores on IQ tests for many populations have been rising at an average rate that scales to three IQ points per decade since the early 20th century, a phenomenon called the Flynn effect. Investigation of different patterns of increases in subtest scores can also inform current research on human intelligence.
IQ tests should be used to select students for university, says government's adviser
By Richard Garner, Education Editor
10 December 2003
IQ-style tests are more reliable than A-levels in predicting how well a student will do at university, according to research published yesterday...
November 10, 2003
The wealth of nations is mapped by their IQ
By Glen Owen
Research says that intelligence is the largest factor behind economic success
A COUNTRY’S prosperity is closely related to the average IQ of its population, according to research that has mapped global...
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IQ Will Put You In Your Place
By Charles Murray
Imagine several hundred families which face few of the usual problems that plague modern society. Unemployment is zero. Illegitimacy is zero. Divorce is rare and occurs only after the children's most formative years. Poverty is absent -...
I took one of those stupid computer IQ tests and one of the questions is still nagging my poor tired brain.
a monkey and a weight are on the opposite sides of a pully. The rope, that the monkey is holding on to and the weight is tied to, is considered weightless. The pully is also...
http://www.testonfox.com/
They had a nationally-televised IQ test that was live in the east half of the US, and in Pacific I just finished watching it and getting scored
I got a 55/60, which corresponds to a 127 IQ, apparently
I think that's the top 10% or so, so that's pretty good. I...
The test has 30 questions and is timed (maximum of 45 minutes). Scores are posted with corresponding test takers. 70 percent on the test indicates a general IQ of 111.
http://www.geocities.com/prestonhayesproject/iqtest.htm
I'm curious as to what others think of IQ tests. To me it's simply a rough gauge of one's aptitude for making sense of nonsens. I'm not sure of the real history of it, but I have a foggy memory that it became very practical during the world wars for sorting out people who were apt at solving...
I am currently trying to norm an iq test. I would appreciate your participation. I am sure that you will find it interesting; go to:
http://www.geocities.com/uiowa52405/iq.htm
and click on logical iq test-the test is timed, for maximum time of 25 minutes.
The subject of IQ tests have been discussed over and over in PF 2.0 (but in different topics, and in the middle of topics).
It seems that the PF members don't all agree on wether the IQ test is really a good pointer to the person's intelligence.
-Some of the users on PF said that IQ tests are...