* IQ and the Wealth of Nations

The 2006 book IQ and Global Inequality is a follow-up to IQ and the Wealth of Nations by the same authors.

The central thesis of IQ and the Wealth of Nations is that the average IQ of a nation correlation coefficient | correlates with its GDP.

National IQ estimates from IQ and the Wealth of Nations with countries in red on the low spectrum and countries in purple on the higher end

" For example, it argued that IQ and the Wealth of Nations, in order to show that the tests are unbiased, uses outdated methodology, if anything indicative that test bias exists.

In 2006, Lynn and Vanhanen followed IQ and the Wealth of Nations with their book IQ and Global Inequality, which contained additional data and analyses, but the same general conclusions as the earlier book.

Along with the rest of Lynn's work, IQ and the Wealth of Nations has had a large impact on the understanding of human differences, and has served as the basis for many subsequent studies about international comparisons.

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# REDIRECT IQ and the Wealth of Nations

( see IQ and the Wealth of Nations ).

Vanhanen is a co-author ( with Richard Lynn ) of IQ and the Wealth of Nations ( 2002 ) and IQ and Global Inequality ( 2006 ), and author of Ethnic Conflicts Explained by Ethnic Nepotism ( 1999 ) and many other works.

When intelligence quotient ( IQ ) tests are initially standardized using a sample of test-takers, by convention the average of the test results is set to 100 and their standard deviation is set to 15 or 16 IQ points.

Though the effect is most associated with IQ increases, a similar effect has been found with increases of semantic and episodic memory.

There is debate about whether the rise in IQ scores also corresponds to a rise in intelligence, or a rise in skills related to taking IQ tests.

But this rise in IQ test scores is not wholly explained by an increase in general intelligence.

One problem with this explanation is that if in the US comparing older and more recent subjects with similar educational levels, then the IQ gains appear almost undiminished in each such group considered individually.

This explanation may imply that IQ tests do not necessarily measure a general intelligence factor, especially not Raven's as often argued, but instead may measure different types of intelligence that are developed by different experiences ( this argument is against the notion of an underlying general intelligence, or g factor ).

That is, those with a greater IQ tend to seek stimulating environments that further increase IQ.

Citing a high correlation between rising literacy rates and gains in IQ, David Marks has argued that the Flynn effect is caused by changes in literacy rates.

A 2005 study presented data supporting the nutrition hypothesis, which predicts that gains will occur predominantly at the low end of the IQ distribution, where nutritional deprivation is probably most severe.

A further decline of 1. 28 IQ points in the world's genotypic IQ is projected for the years 2000 – 2050.

There is a controversy regarding whether the US racial gap in IQ scores is converging.

Rushton and Jensen argue against expecting the Flynn Effect to narrow the US black-white IQ gap since they see that gap as mostly genetic in origin and there is evidence from mathematical analyses that what causes the Flynn effect is different from what causes the black-white gap.

An intelligence quotient, or IQ, is a score derived from one of several standardized tests designed to assess intelligence.

When modern IQ tests are devised, the mean ( average ) score within an age group is set to 100 and the standard deviation ( SD ) almost always to 15, although this was not always so historically.

Thus, the intention is that approximately 95 % of the population scores within two SDs of the mean, i. e. has an IQ between 70 and 130.

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.

Whether IQ tests are an accurate measure of intelligence is debated.

In June 2002, the American Journal of Medical Genetics published results from a longitudinal prospective cohort Denver Family Development Study led by pediatrician and geneticist Arthur Robinson, which found that in fourteen prenatally diagnosed 47, XYY boys ( from high socioeconomic status families ), IQ scores available for six boys ranged from 100 – 147 with a mean of 120.

Sailer responded that his accusers admitted a correlation between low IQ and poor judgment by supporting the Supreme Court's 2002 Atkins v. Virginia decision " that, in effect, banned the death penalty for killers with IQs under 70.

vi: Danh sách IQ quốc gia theo ước tính của Lynn và Vanhanen ( 2002, 2006 )

The first show, in May 2002, was an IQ test and the six groups of 50 studio participants included blondes, brunettes, teachers and students.

Experts who joined Dr Colin Cooper on the IQ test panel have included Sylvia Herbert, a director of British Mensa ( 2002 and 2003 ) and Baroness Susan Greenfield, scientist and polymath ( 2004 ).

# The National IQ Test ( 11 May 2002 )

( 2002 ) found 3. 16 higher IQ points for males but no difference on the general intelligence factor ( g ) and therefore explained the differences as due to non-g factors such as specific group factors and test specificity.

Moreover, it would prove that the main source of the differences between whites and blacks in IQ tests is the same as the main source of differences between individuals within each racial group, namely g. This would suggest that to understand the nature of the black-white gap, one would have to understand the nature of g. In 2002, Jensen stated that he had now tested Spearman's hypothesis on 25 large independent samples, and it had been confirmed on every one.

In June 2002, he was acquitted of drug conspiracy charges after his attorney argued his low IQ of 70 prevented him from understanding that he had agreed to a drug deal and that he was borderline retarded.

Defense for Couey argued that he had suffered from a lifetime of emotional abuse and had a below normal IQ, which would enable him to avoid a death sentence under a 2002 Supreme Court ruling prohibiting the execution of mentally handicapped people.

Noriq Records pronounced ( Nor-reek ) was incorporated in June 2002 by IQ and Nor of KIN.

One summary of the relationship between employment policy and IQ testing is provided by Murphy ( 2002 ):