In the past, America was an overwhelmingly white country so the IQ distribution of American whites was virtually the same as the IQ distribution of all Americans (mean = 100, standard deviation = 15), but as demographics continue to change, on IQ tests where the mean and standard deviation of all Americans is set at 100 and 15 respectively, pre-generation X white Americans have a mean of about 102 (SD = 14.5) and post-generation X white Americans have a mean of about 103 (SD = 14.5). The reason post-generation X whites score higher than pre-generation whites is not the Flynn effect (IQ tests are normed so that the mean of every birth cohort is 100) but because as the country becomes less white, the position of the average white moves to the right of the bell curve.
One way to avoid this source of confusion is for all IQ tests to be normed with reference to American or British whites, as opposed to Americans in general. That way, regardless of whether America is 100% white or 1% white, an IQ of 100 will always reflect the intelligence of the average white American of your generation. And even though white Americans today perform 2 standard deviations better on IQ tests today than they did 100 years ago, assuming the white gene-pool has remained static (some say it’s declined). and assuming IQ is highly genetic (some say it’s not), an IQ of 100 will always reflect roughly the same genetic level of intelligence (at least in theory).
So in order to convert IQs where the American mean and SD are 100 and 15 respectively onto a scale where the white American mean is 100 and 15 respectively, apply these formulas:
Pre-generation X:
White American IQ = [(American IQ – 102)/14.5][15]+100
Post-generation X:
White American IQ = [(American IQ – 103)/14.5][15]+100
For whatever reason, this has been come to be known in peer-reviewed scholarly journals as the “Greenwich IQ”, though usually it’s calculated simply by subtracting 2 points from American IQ scores (which is kind of sloppy because it ignores the fact that whites not only have a higher mean than Americans as a whole, but a narrower standard deviation).
I believe scholar Richard Lynn invented the concept, at least in the modern era. From his 2006 book Race Differences in Intelligence, he writes:
The metric employed for the measurement of the intelligence of the races has been to adopt an IQ of 100 (with a standard deviation of 15) for Europeans in Britain, the United States, Australia, and New Zealand as the standard in terms of which the IQs of other races can be calculated. The mean IQs of Europeans in these four countries are virtually identical, as shown in Chapter 3 (Table 3.1), so tests constructed and standardized on Europeans in these countries provide equivalent instruments for racial comparisons.
In Britain, Australia, and New Zealand, the intelligence tests have been standardized on Europeans, and this was also the case in the United States in the first half of the twentieth century. In the second half of the twentieth century American tests were normally standardized on the total population that included significant numbers of blacks and Hispanics. In these standardization samples the mean IQ of the total population is set at 100; the mean IQ of Europeans is approximately 102, while that of blacks is 87 and of Hispanics about 92 (see, e.g., Jensen and Reynolds, 1982). This means that when the IQs of other races are assessed with an American test standardized with an IQ of 100 for the total American population, 2 IQ points have to be deducted to obtain an IQ in relation to 100 for American Europeans. This problem does not arise with the only British test used in cross-cultural studies of intelligence. This is the Progressive Matrices, which has been standardized on British Europeans.
dear god who cares.
pp is a tool. he’s obsessed with a war that isn’t. he’s brushing lint of his jacket when the enemy is already over the barricades or put him in a camp.
clever gypsies? YES! the following quote is genuine. it’s not a conspiracy of the czar’s secret police.
chief Sephardi rabbi of Israel, Ovadia Yosef, in 2010:
Gentiles exist only to serve Jews…With gentiles, it will be like any person – they need to die, but [God] will give them longevity. Why? Imagine that one’s donkey would die, they’d lose their money. This is his servant… That’s why he gets a long life, to work well for this Jew, Why are gentiles needed? They will work, they will plow, they will reap. We will sit like an effendi and eat. That is why gentiles were created.
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I wrote about this,
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“America has an average IQ of 98, so it is two points below x. But what is x, is it the whole world? Does that mean that more than the half of the world population is smarter than americans? Surely not.
x is probably the average IQ of mostly western countries. So America is two points below the western average. IQ’s of non-western countries are always compared to the western sample, but have no effect on the the average IQ of 100.
So the sum of all western countries is always 100, even if the population changes. If the real intelligence decreases through immigration of people with lower IQ or that the smartest native people have the least kids, while the least intelligent have the most kids, the IQ will stay at 100.
The effects of this development is that the IQ of non-western countries who don’t have such a dysgenic development will increase their IQ without necessarily getting smarter.
The average IQ of people in western countries stays the same, but the average IQs of all races in western countries are increasing. This may sound strange, but it is true.
Whites in america have a higher IQ than hispanics and blacks, but the percentage of whites is decreasing, while the percentage of hispanics and blacks is increasing.
This pushes down the real intelligence, but the average IQ still stays at 100.
If the real average intelligence of blacks in america is 85, and the real intelligence of western countries decreases to 85, the IQ of american blacks will be 100.
Let’s see the effects of dysgenic and eugenic fertility on the IQ two people.
The first person is Andy, he has an IQ of 80, the second person is John, he has an IQ of 120.
The average IQ in their country is 100.
If the average IQ of newborn babies in the future is less than 100, the IQ of Andy and John will Increase. If it is higher than 100, the IQ of both will decrease.
I guess this is a good explanation for the Flynn-Effect, atleast to some extent.”
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The full Flynn effect is observed within races.
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