Friday, March 31, 2017

Average IQ can be a real bear, or silk purses and sow's ears

Do you know how a bell curve works? There's a book by that name, but I'm not referring to that just yet. A bell curve is all about statistical distribution, and you can read about the principle here [link]. But the book is about intelligence, and the bell curve does apply to that. If you have a country with a million people, and their average IQ is 100, given the overwhelmingly likely normal distribution, there will be X number of people with an IQ greater than 110. Now, if a doctor needs an IQ of 110 to be effective, and the million people require about X number of doctors, you have no problem. You have enough doctors. But if you have an average IQ of 90, you will not have enough doctors. Not nearly enough. And as for aerospace engineers and other high-IQ professions, you can forget it. Your country will not be competitive with countries with higher average IQ's. Take a look at this comparison of the Black American IQ bell curve with the White American one (I found it here [link]). First off, look at the 110 IQ mark. If you have a country consisting of a million White Americans, you're going to have at least three times as many people with an IQ of 110 than a corresponding country made up of a million Black Americans. The first will have enough doctors, and the second will have fewer than a third as many as it needs. As for Sub-Saharan Africa, with an average IQ of 70, forget it.

This is not trivial. It's intrinsic. And it doesn't just apply to higher IQ's. Let's say that an effective auto mechanic needs an IQ of 95 or more. Well, our two hypothetical countries are widely different here, too.  Don't be misled. The number of Blacks and Whites with an IQ of 95 look about equal. But there are many, many more Whites with an IQ of equal to or greater than 95 than there are Blacks.

Anyhow, Richard Lynn and Tatu Vanhanen wrote a book called IQ and the Wealth of Nations [link] that explains in detail why average IQ is overwhelmingly important to the prosperity of a nation. Here's what Richard Lynn writes, from here [link]:

I graduated in psychology and took my Ph.D. at the University of Cambridge and have worked as lecturer in psychology at the University of Exeter, professor of psychology at the Economic and Social Research Institute, Dublin, and at the University of Ulster.

Most of my work has been on intelligence. My major discoveries are that the Oriental peoples of East Asia have higher average intelligence by about 5 IQs points than Europeans and peoples of European origin in the United States and elsewhere; and that men have a higher average IQ than women by about 5 IQs points. I first published the high IQ of the Oriental peoples in 1977 in a paper on the intelligence of the Japanese. In subsequent years the high Oriental IQ has been confirmed in numerous studies of Oriental peoples in Hong Kong, Taiwan, South Korea, China, Singapore and the United States.

In 1983 I published a paper in Nature showing that the IQ in Japan had increased over the course of the previous half century, a phenomenon now known as the Flynn Effect following the demonstration by Jim Flynn of secular increases in intelligence in number of countries. In 1989 I proposed that the increases in intelligence have been caused by improvements in nutrition. I have also published several papers showing that intelligence is associated with brain size and reaction times.

My work on intelligence and brain size led me to consider the problem that women have smaller brains than men even when allowance is made for their smaller bodies. This implies that men should have higher average IQs than women, but it has been universally asserted that men and women have equal average IQs. In 1994 I proposed that the solution to this problem is that girls mature faster than boys and this compensates for their lower IQs, which only appear at the age of 16 onwards. Among adults men have higher average IQs than women by about 4 IQ points. This advantage consists largely of higher spatial abilities but is also present in non-verbal reasoning. In two meta-analyses of sex differences on the Progressive Matrices carried out with Paul Irwing (2004, 2005) we showed that in the general population men have a higher IQs than women by 5 IQ points, and in university students the advantage of men is 4.6 IQ points.

In 1991 I extended my work on race differences in intelligence to other races. I concluded that the average IQ of blacks in sub-Saharan Africa is approximately 70. It has long been known that the average IQ of blacks in the United States is approximately 85. The explanation for the higher IQ of American blacks is that they have about 25 per cent of Caucasian genes and a better environment.

The theory I have advanced to explain these race differences in IQ is that when early humans migrated from Africa into Eurasia they encountered the difficulty of survival during cold winters. This problem was especially severe during the ice ages. Plant foods were not available for much of the year and survival required the hunting and dismembering of large animals for food and the ability to make tools, weapons and clothing, to build shelters and make fires. These problems required higher intelligence and exerted selection pressure for enhanced intelligence, particularly on the Orientals.

--------------One thing not directly touched on here is the all-too-obvious (to non-liberals) fact that low-IQ immigrants to high-IQ countries lower the average IQ of the countries they move into. The US has been suffering from that ever since LBJ said that we don't want European immigrants any more, but sure do want the low-intelligence peasants and savages from the Third World. Vox Day compares our crumbling infrastructure with our plummeting average IQ. This is from his site [link]:

Crumbling infrastructure, crumbling society

It's interesting to drive over medieval and Roman-era bridges in Europe, then witness reports like these coming out of progressive Not-America:
Atlanta's notoriously tangled commutes were thrown into disarray Friday after a massive fire caused a bridge on Interstate 85 to collapse, completely shutting down the heavily traveled highway through the heart of the city.

Traffic was bumper to bumper on nearby streets as people scrambled to find alternate routes after the fire broke out during rush hour Thursday afternoon. However, officials said no one was hurt despite dramatic images of towering flames and plumes of smoke.

"This is about as serious a transportation crisis as we can imagine," Atlanta Mayor Kasim Reed said.

As a result of the interstate damage, many commuters in some of Atlanta's densely populated northern suburbs will be forced to find alternate routes or ride public transit for the foreseeable future.

Georgia's top transportation official said there's no way to tell when the highway, which carries 250,000 cars a day, can be safely reopened to traffic in either direction following the collapse in the northbound lanes leading out of the city.

"We will have to continue to evaluate the situation and adjust as we do," Department of Transportation Commissioner Russell McMurry said. "This incident — make no bones about it — will have a tremendous impact on travel."

McMurry said Friday in a news release that bridge inspectors have determined the southbound lanes of I-85, adjacent to the section that collapsed, also were damaged by the fire and will need to remain closed for the foreseeable future.
It is average IQ that is the prime determinant of what a society will be like. And according to my calculations,
the average US IQ has declined by at least eight points since 1965. If you don't maintain your population demographics, both in terms of quantity and quality, your society will decline. And if you don't maintain your infrastructure, it will collapse.

Unfortunately, addressing either problem, let alone actually doing anything to fix them, is presently considered unthinkable. That will change, sooner or later, but how soon it changes will play a significant role in the shape of the eventual outcome.
One thing I'd like to add here for food for thought is the fact that a high-IQ place like Hong Kong (average 108 IQ) that has virtually zero natural resources is infinitely more prosperous than, say, Venezuela, which has heaps of natural resources and an average IQ of 84. So when you're told that the prosperity of, say, the United States has nothing to do with the qualities of the American people, but is the result of the presence of great amounts of natural resources, you can answer that the resources were here before any White person had ever heard of the place. American Indians were right here for literally thousands of years, and they made use of virtually none of the mineral resources or water power or other things we take for granted. Nor did they domesticate any animals except turkeys (llamas and related species were domesticated by South American Indians).
And I think I've rung this bell enough for one post.
Quibcags:  The first is illustrated by Yuki Nagato, who I picked because of her high IQ. Just look at her and try to claim otherwise. She's from The Melancholy of Haruhi Suzumiya (涼宮ハルヒの憂鬱 Suzumiya Haruhi no Yūutsu)I don't know who the girl in the second one is, but the third is characters from Haruhi again, dressed as nuns for some reason. And the last is a puzzled girl from Lucky Star (らき☆すた RakiSuta).


  1. I have serious doubts about these median IQ numbers. First blacks in Africa have medians around 65 - 70. The idea that blacks have interbred so much their IQ is at least a whole standard deviation higher is demonstrably untrue. Miscegenation was illegal til recently, so this doesn't even seem plausible.
    That Asians have a higher IQ than Whites also doesn't pass the smell test. Whites create and Asians copy. The idea that creativity and IQ are not related flies in the face of rationality. What is the controlling attribute then? Intuition? No. I have a feeling they're using a mixed population for White countries and only certain small populations for Asians. Orientals LOVE TO CHEAT. They're proud of it. Winning is far more important than honesty in any Non-White country. Look at the corruption and try to disagree with this statement.
    IQ isn't everything but for skilled labor it might as well be. The IQ to performance in school is so high its spooky. Psychometry is the only part of Psychology besides Behavioral Studies, I would feel comfortable calling science. The rest is Oprah/Dr. Phil self-help touchy-feely mumbo-jumbo.

  2. "No one was hurt."

    The First Law of Lying is plausibility.

    Nicholas Stix

  3. Ex-Army,

    Are you or Lynn saying that America's national IQ is down to 90? I calculated a few years ago that it was down to 94.5 (or was that NYC's IQ--can't recall). 90 would put us fully in the Third World.

    Nicholas Stix

  4. I guess itz safe to say America's IQ is between 90 and 100.
    So 95 is a safe bet. With the changing demographics in the not too distant future, America's IQ is sure to drop. The future looks Brazil like. Our leaders sure don't care where immigration comes from as long as there is growing consumer spending.