Friday, September 30, 2016

Race and Intelligence

Found this as a comment on Yahoo, not necessarily my opinion. What do you think? 

General intelligence is inherited and not equally distributed among human races. IQ tests are designed to measure the general innate and immutable mental capability that involves abstract and cognitive thinking, spatial-relations skills, and logical reasoning. They are designed to measure the ability to:
     •   solve novel problems
     •   retain knowledge and apply skills
     •   comprehend complex ideas
     •   plan and learn quickly and from experience
   
IQ tests are not designed to measure how much a person has learned, but rather whether a person is capable of learning.
Intelligence, so defined, can be measured, and intelligence tests measure it well. They are among the most accurate (in technical terms, reliable and valid) of all psychological tests and assessments.
It was discovered that people who did well on one mental test did well on others, regardless of their content. It was reasoned that different tests must draw on the same global capacity, and dubbed that capacity g, for general intelligence.

Individual differences in general cognitive ability are reliably measured by IQ tests. IQ is strongly related, probably more than any other single measurable trait, to many important educational, occupational, economic and social variables. IQ is also correlated with a number of variables of the brain, including its size, electrical potentials, and rate of glucose metabolism during cognitive activity. Individual differences in adult IQ are largely genetic, with heritability of about 70 percent. 

So far, attempts to raise IQ by educational or psychological means have failed to show appreciable lasting effects on cognitive ability and scholastic achievement. The IQ distribution between Blacks and Whites is represented by two largely overlapping bell curves with their means separated by about 15 points, a difference not due to test bias. IQ has the same meaning and practical predictive validity for both groups. Tests do not create differences; they merely reflect them. 

The average score is set at 100, and everyone is rated accordingly. Expressed this way, IQs for a whole population can be arrayed on a single graph. Roughly two-thirds of all Americans fall between 85 and 115, in the fat midsection of the bell-shaped curve, and 95 percent score between 70 and 130.
By computing a value known as the correlation coefficient, a scientist can measure the degree of association between any two phenomena that are plausibly linked. The correlation between unrelated variables is 0, while phenomena that vary in perfect lock step have a correlation of 1. A correlation of .4 would tell you that 40 percent of the variation in one thing is matched by variation in another, while 60 percent of it is not.

Current estimates for heritability of IQ ranges up to 0.8 (where 1.0 indicates that monozygotic twins have no variance in IQ and 0 indicates that their IQs are completely uncorrelated). See the Minnesota Twin Family Study, conducted from 1979 to 1999, which followed identical and fraternal twins who were separated at an early age for some fascinating revelations about the powerful influence of genes.
Studies find no IQ correlation among grown adoptive siblings. But the typical correlations are roughly .35 for half siblings (who share a quarter of their genes), .47 for full siblings (who share half of their genes) and .86 for identical twins (who share all their genes).

Millions of IQ tests and psychometric experiments conducted world-wide over 100 years have been normed for every conceivable variable and bias, yet demonstrate an intractable intellegence divide between Blacks and the other races. Blacks score lowest on every intelligence test ever devised, including "life". There has never been an IQ test administered anywhere in the world where the racial rankings didn't follow the same pattern; Asians, Whites, non-White Hispanics, and then finally Blacks.

Compared to Blacks, Whites' brains:
     •   are 7% larger (1438cc versus 1343cc)
     •   are 100 grams heavier
     •   have deeper fissuration in the frontal and occipital regions
     •   have more complex convolutions and larger frontal lobes
     •   have more pyramidal neurons
     •   have 16% thicker supra-grandular layer
     •   react faster on mental chronometry tests
     •   have 600 million more neurons (each carries about 600 billion synapses, which each carry one bit of cortical information) 

Genes contribute to about 90% of the individual variation of brain size.

Blacks are the only racial group with no DNA from the large-brained Neanderthals, and also the only race without the derived form of MCPH1 microcephalin called haplogroup D which produces increased brain volume.

Racial activist groups have tried to create their own tests to demonstrate intellectual parity of the races and also attack the integrity of the existing tests and have hired anti-bias experts, but the rankings are always the same; African Blacks average a 70 IQ (only 2% of Whites score this low), but American Blacks average 85 due to mixing with Whites (28% on average), non-White Hispanics 87, Whites 100, Asians 106 and Ashkenazi Jews 115. 

Blacks have by far the lowest IQs of any race; 80% score at or below the "low functioning" category. In fact, only the top 16% of Blacks score as high as the top 50% of Whites. Blacks are socially functional at 70 IQ because that is only one standard deviation below their mean; that equates to a White at 85 IQ.

Even using tests created by Black psychologists and non-verbal tests designed to be culture-free and unbiased, no amount of testing or wishful thinking shows any improvement in Black IQ. Tests that only require the subject to push buttons in response to flashing lights or memorizing sequences of colored squares projected on a screen Blacks perform worse than Whites, and the gap increases as the patterns become more complicated. The test involves rows of colored squares where one from each row has to be matched with another. More complex images which have distinctive features linked by that feature to other images in an increasing number of rows.

Another test is a list of numbers read aloud and the subject has to repeat them back in forward and reverse order. The subject is given a relevant fact that has to be considered when making otherwise simple manipulations of numbers and identify designated figures or characters in a given amount of time. The "backward digit span" test is not reinforced by any socialization and is not a taught skill for either race; Whites score better at recalling digits presented in order, but recalling the digits in reverse order requires mental transformation and is a good predictor of IQ. The race gap for the backward digit span is twice as great as for the forward test. 

Raven’s Progressive Matrices is a completely non-verbal test of pattern recognition and reasoning and contains no culturally-specific information, African Blacks scored 70 IQ. Interestingly, the mixed-race students in South Africa had an IQ of 85 -- the same as Blacks in the United States, Britain, and the Caribbean. This is a standard deviation above pure Blacks, but also a standard deviation below Whites.

Genetics limits an individuals' upper limit to IQ, and environment determines how much of that innate genetic potential will be reached. No amount of nurturing can make one exceed innate genetic potential.

The IQ race gap doesn't begin to correlate firmly with adult IQ until about age five, but studies reveal a one standard deviation race gap present by age three.

In the United States, self-identified Blacks and Whites have been the subjects of the greatest number of studies. The tests show a Black-White IQ difference of about 15 to 18 points (or about one standard deviation) which implies that between 11 and 16 percent of the black population have an IQ above 100 (the general population median). Consistent results were found for college and university application tests such as the Scholastic Aptitude Test and Graduate Record Examination as well as for tests of job applicants in the corporate sector and in the military.

The least intelligent ten percent of Whites have IQs below 81; forty percent of Blacks have IQs that low. Only one Black in six is more intelligent than the average White; five Whites out of six are more intelligent than the average Black. These differences show in every test of general cognitive ability that anyone, of any race or nationality, has yet been able to devise. And they are reflected in countless everyday situations, “Life is an IQ test.” 

Further, only one-in-3.5 million (.00003%) African Blacks have an IQ of 140 or higher (genius level). But one-in-83 (1.2%) U.S. Whites is a genius. Therefore the per capita genius rate for U.S.-resident Whites is 41,000 times higher than it is for African Blacks.

The IQ distribution for US-resident Blacks having an average IQ of 85 and a standard deviation of 12.4 doesn't mean that there are no Blacks at all with IQs above 140; it means that only one Black in about 218,000 will have an IQ above 140. Meanwhile one-in-83 Whites have an IQ above 140. So given equal sized populations there will be about 2,600 times more White geniuses than Black geniuses. Since there are about 5.5 times more Whites than Blacks in the United States, White geniuses will outnumber Black geniuses by a ratio of about one-to-14,300. Therefore, if all the White people in the USA were replaced by Blacks having the IQ distribution of US-resident Blacks the number of geniuses in the country would fall from about 2.4 million to only about 1,000.

For every one gifted Black there are 8 gifted Whites, 80% of gifted Blacks are mixed race.

Incidentally, though the average IQ of East Asians is 6 points higher than the average non-Jewish White, the percentage distribution of East Asians with IQs above 140 is slightly lower. The reason for this is that the range of cognitive variation among Whites is greater than among East Asians. Specifically, Asians' IQs are more clustered around the mean; therefore, Whites produce more geniuses, but also more morons.

Psychometricians regard IQ tests as having high statistical reliability. A high reliability implies that although test-takers may have varying scores when taking the same test on differing occasions, and they may have varying scores when taking different IQ tests at the same age, the scores generally agree with one another and across time. 

Standardized intelligence testing has been called one of psychology's greatest successes and is the field's most widely-used invention. Since standardized tests were first used to identify learning-impaired children in the early 1900s they have become one of the primary tools for identifying children with learning disabilities, they assist the military place new recruits, job screening and for evaluating professional athletes. 

Some occupations seek candidates within specific IQ ranges. There was a recent case where a police officer candidate was rejected after he scored too high on an intelligence test.

The NFL famously uses the Wonderlic test in their scouting combines and the racial disparity is evident. Out of a perfect score of 50; offensive tackles=26, centers=25, quarterback=24; versus safeties=19, cornerbacks=18 and receivers=17.
Black-White IQ Distribution (Google: racial IQ bell curve):
Blacks:
                 5% above 110 IQ
                 16% above 100 IQ
                 40% above 90 IQ
                 70% above 80 IQ
                 30% below 80 IQ
                 18% below 75 IQ
                 10% below 70 IQ
Whites:
                 10% above 120 IQ
                 18% above 115 IQ
                 27% above 110 IQ
                 40% above 105 IQ
                 50% above 100 IQ
                 60% below 105 IQ
                 35% below 95 IQ
                 15% below 85 IQ

So, the top 16% of Black intellectual elites are only as intelligent as the top 50% of Whites.

As the New York Times put it, "...the difference in I.Q. points between the groups is quite significant. 
It means that the top sixth of Blacks score only as well on I.Q. tests as do the top half of Whites."
IQ scores are used as predictors of educational achievement, special needs, job performance and income. They are also used to study IQ distributions in populations and the correlations between IQ and other variables. The same is true for other cognitive tests such as No Child Left Behind mandated state tests and NAEP tests. All of these cognitive tests show the same racial patterns in test score distribution with Ashkenazi Jews, East Asians (Chinese, Japanese, and Koreans), and Whites showing higher scores than Pacific Islanders, Native Americans, Hispanics, and Blacks showing lower scores. 

The scores on the SAT (especially the SAT-math) and the ACT are for all practical purposes interchangeable with IQ test scores. In 2005, 153,132 Black Americans took the SAT test. They made up 10.4 percent of all SAT test takers. But only 1,132 Black college-bound students scored 700 or above on the math SAT and only 1,205 scored at least 700 on the verbal SAT. On the math SAT, only 0.7 percent of all Black test takers scored at least 700 compared to 6.3 percent of all White test takers. Thus, Whites were nine times as likely as Blacks to score 700 or above on the math SAT. Only 0.16 percent of all Black test takers scored 750 or above compared to 1.8 percent of White test takers. Thus, Whites were more than 11 times as likely as Blacks to score 750 or above on the math SAT.
This gap is so significant that colleges give a "race bonus" of 230 points to Blacks, 185 to non-White Hispanics and penalize Asians by 50 points, all in an effort to help the low-IQ races gain admittance.
A person's level of moral reasoning is correlated with intelligence. Studies sequencing the stages of moral development support what we all know; you have to be cognitively mature to reason morally. IQ tests correlate with moral maturity. 

There is also a strong correlation between IQ and success. Economists have started taking an interest in the value of human capital, particularly the factor that psychologists call cognitive ability. In other words, it’s the ability of a person to solve a problem most efficiently. Not with violence, but by thinking. It is worth noting here that Blacks possess 9.4 times more of the dysfunctional MAOA gene ("warrior gene") and have mean testosterone levels 19% higher than in Whites, both strongly correlated with impulsive, aggressive and violent behavior. 

Researchers collected information on 90 countries, including far-off lands from the U.S. to New Zealand and Colombia to Kazakhstan. They also collected data on the country’s excellence in science and technology, including the number of patents granted per person and how many Nobel science laureates the country’s people had won in science (there has never been a Black Nobel science laureate).

They found that intelligence made a difference in gross domestic product. For example, some of the highest National IQs:
          •   108      Singapore
          •   106      South Korea
          •   105      Japan
          •   105      China
          •   102      Italy
          •   101      Iceland
          •   101      Mongolia
          •   101      Switzerland
          •   100      Austria
          •   100      Luxembourg
          •   100      Netherlands
          •   100      Norway
          •   100      United Kingdom
And the lowest:
          •   69        Malawi
          •   69        Niger
          •   68        Chad
          •   68        Somalia
          •   68        Swaziland
          •   67        Guinea
          •   67        Haiti
          •   67        Liberia
          •   66        Gambia
          •   64        Cameroon
          •   64        Gabon
          •   64        Sierra Leone
          •   64        Mozambique
          •   59        Equatorial Guinea

Blacks are archaic proto-humans, a different species from Whites and Asians;
Blacks are the only racial group with no DNA from the large-brained Neanderthals who lived in Europe. The trans-Saharan African migrants mated with the Neanderthals and Denisovans to create a composite hybrid that is modern man. Therefore, we do not share a common ancestor. 

The farther north the populations migrated out of Africa, the more they encountered the cognitively demanding problems of gathering and storing food, gaining shelter, making clothes, and raising children during prolonged winters. Consequently, as the original African populations evolved into present-day Whites and Asians, they did so by hybridizing with Neanderthals which created larger brains and greater intelligence, but also slower rates of maturation, lower levels of sex hormones, and concomitant reductions in sexual potency and aggressiveness, and increases in family stability and social conformity.

Neanderthals are a different species than Whites, and yet produced fertile offspring (as do many interspecies hybrids). In fact all modern humans (Whites and Asians) are products of that hybridization.

Blacks have a genetic distance closer to archaic human than to modern human. That genetic distance is farther apart than it is for many species.

Genetic distance is a measure of the genetic divergence between species or between populations within a species. Populations with many similar genes have small genetic distances. This indicates that they are closely related and have a recent common ancestor.

The genetic distance between H.Sapien and H.Erectus is only 0.17, while the genetic distance between Blacks and Eurasians is 0.23. Therefore Blacks are more genetically proximate to archaic humans than to modern man (Whites and Asians).

For comparison, the genetic distance between Blacks and modern man is greater than the genetic distance between the common chimpanzee and the bonobo (0.103, or half the Black-White distance) and between the Gorilla gorilla and the Gorilla beringei (0.04, or 1/6 the Black-White distance). Thus, Whites and Blacks are more genetically distant than two different chimpanzee species, two different gorilla species, Eurasians and Neanderthals, and Eurasians and H.Erectus. 

To be taxonomically consistent Blacks and Whites should be classified into separate species, or at the very least into different subspecies.

When humans evolved from Blacks they hybridized with the large-brained Neanderthals in southern Europe and created an increase in cranium capacity and a heavier, more developed brain. Blacks are also the only race without the derived form of MCPH1 microcephalin called haplogroup D which produces increased brain volume and density. 

Non-Black humans average 4% Neanderthal DNA. This is significant because there is only 1.5% difference between human and chimpanzee DNA. It is equivalent to having one Neanderthal great-great-great-grandparent. Blacks are the only race with no Neanderthal genes. Blacks also coexisted and interbred with archaic sapiens (H.heidelbergensis) for longer than those who left Africa. At least 30% of the Neanderthal genome made its way into non-Black humans.

Blacks are Humans 1.0; the other races evolved from Blacks and are Humans 2.0, the improved version. They were formed by hybridization with the large-brained Neanderthals which created larger, more complex brains:
     •   Blacks = 2% Archaic admixture
     •   Whites = 4% Neanderthal admixture
     •   Asians = Neanderthal + Denisovan

Pure H.Sapiens are Blacks; modern man (Whites and Asians) is mixed with Neanderthal and the improved version.

Blacks belong in the Stone Age, where they were found just 400 years ago.

Sub-Saharan Blacks did not receive Neanderthal or Denisovan gene introgression, which partly explains why Blacks are the most genetically distant of all the human races.

However, Blacks received significant gene introgression from other early (and unknown) hominid species, which the other races do not have because they left sub-Sahara before the introgression occurred. These early hominids remain "unknown" due to the simple fact that their DNA has not been retrieved nor sequenced, Only Neandertal and Denisovan DNA have been, thus far.

Forensic scientists can determine race by cranium shape; Blacks have a small frontal lobe and sloping frontal plane and a smaller cranium-to-mandible ratio. Whites have the largest craniums, an almost vertical frontal slope and a massive frontal lobe. The Asian is very similar and also more evolved. It is the frontal lobe that separates our behavior most from the animals and is responsible for language and rational thought.

Blacks show primitive traits associated with lower primates, such as prognathism, which is the slope of the face from the forehead to the jaws. A protruding jaw is associated with a sloping forehead which indicates a smaller prefrontal cortex, the area of the brain that handles planning, inhibition and self-control. 

Blacks have more robust cranial bones, simpler cranial sutures, a higher rate of unclosed sutures, a lower cephalic index, a higher rate of saggital keel, more post-orbital constriction, a more sloped forehead, more rectangular eye sockets, a wider nasal index, less nasal prominence, a higher rate of joined nasal bones, a higher rate of sub-nasal prognathism, a lower facial angle, the presence of the "Simian shelf", a more rectangular palate, larger and wider-apart teeth, fur instead of hair, less spinal curvature, shorter spinal length, a lower sacral index, and longer arms and legs.

At birth Africans have fewer cranial bones than Eurasians. The skull and other bones in Blacks are thicker and denser, even in the fetus, making them more difficult to break. The Black skull is smaller, with less space in the forehead, but proportionately more at the back.

Blacks are the only racial group with no DNA from the large-brained Neanderthals, and also the only race without the derived form of MCPH1 microcephalin called haplogroup D which produces increased brain volume and density. This is why their brains are smaller, and less complex.
Eurasian women have a wider pelvic inlet, and shallower anteroposterior outlet than Black women due to the difference in brain size.

Larger brains contain more neurons and synapses and process information faster. By adulthood, East Asians average 1 cubic inch more cranial capacity than Whites who average 5 cubic inches more than Blacks.

The average White brain is 1438cc while the average Black brain is 1343cc, or 93% of the average White brain. The heritability of brain size is extremely strong at 0.90 and not one study to date has shown larger brain size for Blacks. The White and Asians brain also has a higher degree of fissuring (higher complexity) in the cerebral cortex of their brains, where abstract and conceptual thought is performed.

Based on studies of brain weight at autopsy, endocranial volume of empty skulls, head size measurements by the U.S. military and NASA, and two dozen MRI volumetric studies Blacks' brain size is 7% smaller than Whites', and 8% smaller than Asians'. There is a correlation of brain size with IQ of about 0.40 and that these racial differences in brain size are present at birth. Genes contribute to about 90% of the individual variation of brain size.

In addition to brain size are differences in brain shape, fissuration, number of pyramidal neurons and supra-grandular layer thickness. The depth of fissuration is related to superior intelligence and the brains of Whites have deeper fissures in the frontal and occipital regions. The supra-grandular layer of Blacks' brains is 16% smaller than it is for Whites' brains.

The average human brain contains 86 billion neurons. Whites, on average, have 600 million more neurons than Blacks. Each neuron carries about 600 billion synapses, each of which carries, as a minimum, one bit of cortical information. 

Further, this reflects what we observe in real life (including the large and persistent so-called "Achievement Gap"). People have made long-term observations of the different races and reached rational conclusions; the more White a society is the more prosperous, inventive and safe it is. 19 of the 20 poorest countries are sub-Saharan African (Haiti). In sub-Saharan Africa the only countries that could be considered successful were White-governed, (Rhodesia and S. Africa). To this day they still can't even feed themselves even though they lived alone in Africa, a vast continent with temperate climates and abundant resources, for 60,000 years. So they cannot blame racism, poverty, imperialism or anything else for their failures. 

Sub-Saharan Africans have never made a contribution to the world. No pre-contact sub-Saharan African society ever created a written language (or even words for abstract ideas), weaved cloth, forged steel, invented the wheel or plow, or devised a calendar or code of laws or any social organization, or system of measurement or math or built a multi-story structure or bridge or sewer or road or railway or a sea-worthy vessel, domesticated animals, exploited underground natural resources or produced anything that could be considered a mechanical device.

IQ distribution by race/ethnicity:
     •   Ashkenazi Jews = 115
     •   East Asians = 106
     •   Whites = 100
     •   South East Asians = 87
     •   Non-White Hispanics = 86
     •   American Blacks = 85 (average 28% White admixture)
     •   Middle East and North Africans = 84
     •   Sub-Saharan Blacks = 67 (Only 2% of Whites score this low)
     •   Australian Aborigines = 62

Sub-Saharan Africans never even created a written language. It was the White colonialists who gave the gift of literacy to them. 

No pre-contact sub-Saharan African society ever created a written language or words for abstract ideas, weaved cloth, forged steel, invented the wheel or plow or devised a calendar or code of laws or any social organization or formal religion or system of measurement or math or built a multi-story structure or bridge or sewer or infrastructure of any kind and they never harnessed a river or even drilled well or irrigation or road or railway or sea-worthy vessel, they never domesticated animals or exploited underground natural resources, understood the biological origins of disease, or produced anything that could be considered a mechanical device.

Blacks are the oldest race, so they should be the most advanced race; but they they never developed at all and had to be domesticated by Whites. 

Civilization didn't occur until early humans hybridized with Neanderthals. Only after the hybridization were advanced societies created. Blacks, who never hybridized with Neanderthals, never created a civilization and were still living in the Stone Age when Whites discovered them just 400 years ago.

Hybridizing with the large-brained Neanderthals produced a modern human (Whites and Asians) with an increase in cranium capacity and a heavier, more developed brain. Blacks are also the only race without the derived form of MCPH1 microcephalin called haplogroup D which produces increased brain volume and density.

Blacks lived alone in sub-Saharan Africa, a vast continent with temperate climates and abundant resources for 60,000 years; so they cannot blame racism, poverty, imperialism or anything else for their failures. 

How could they live with all that shoreline and never think about putting a sail on a ship like every other culture did? Columbus sailed across the ocean 500 years ago --- Blacks STILL are incapable of such a feat.

19 of the 20 poorest countries are sub-Saharan African (Haiti). There has never been a successful Black country. No modern creations or civilization exists in sub-Saharan Africa that was not brought there by Whites. There are no White Third-World nations, but all Black ones are. 

Blacks are the only race incapable of caring for themselves. Whites still have to provide food, medical, financial and engineering aid to Africans. They couldn't survive without White charity. Blacks became an out-of-control invasive species after Whites domesticated them.

The 41 nations of sub-Saharan Africa produce no more wealth than the tiny country of Belgium, which has only 1/45 the population. Of all of the region’s economic production, White-run South Africa accounts for three-quarters. That Whites are only 8% of South Africa's population, it demonstrates how productive and industrious Whites are that so relative few can carry the load for so many unproductive Blacks. But a constantly A constantly dwindling number of Whites are at the mercy of a predatory welfare class and it’s possible they can’t and won’t carry the rest of the population. If things get worse for them, they will simply flee the country.

Sub-Saharan Africans have never made a contribution to the world. Blacks can only achieve either because they are mixed with White genes or because they reside in White societies. Blacks are unable to achieve within their own race because not enough of them are smart enough to build a sufficient infrastructure. If allowed to become too numerous they destroy previously-thriving and safe White cities.

This is why Blacks seethe with jealousy and hatred of Whites yet can't seem to stay away because they want what we create and maintain, no matter if they deserve it or not. They want our peaceful and clean neighborhoods, our law and order, our technology and science, our school systems, our inventions, the jobs we create, the food we grow, the transportation we invent, the entertainment we provide..... Blacks hate us but can't live without us. That's why they demand that we take care of them and give them special rights and privileges that we don't grant ourselves, just to compensate for their inability at living in a modern and technologically-advanced civilization.

Some groups succeed all the time, everywhere. Some have never succeeded anywhere. 

Blacks are the oldest race, so they should be the most advanced race; but they they never developed at all and had to be domesticated by Whites. 

Civilization didn't occur until early humans hybridized with Neanderthals. Only after the hybridization were advanced societies created. Blacks, who never hybridized with Neanderthals, never created a civilization and were still living in the Stone Age when Whites discovered them just 400 years ago.

Hybridizing with the large-brained Neanderthals produced a modern human (Whites and Asians) with an increase in cranium capacity and a heavier, more developed brain. Blacks are also the only race without the derived form of MCPH1 microcephalin called haplogroup D which produces increased brain volume and density.

Blacks lived alone in sub-Saharan Africa, a vast continent with temperate climates and abundant resources for 60,000 years; so they cannot blame racism, poverty, imperialism or anything else for their failures. 

Google: "race and IQ", "national IQ", "race and MAOA gene", "Neanderthal DNA", "smaller black brains", "correlation brain size and IQ", "achievement gap", "IQ correlation to achievement", "NIH Blacks 21% greater testosterone", Cumoe, D. & Thorne, A. - 2003. Number of Ancestral Human Species: a Molecular Perspective, Rushton, J. Philippe; Jensen, Arthur R (2005). "Thirty Years of Research on Race Differences in Cognitive Ability", Psychology, Public Policy and Law 11 (2): 246–8, Current Biology, Vol. 13, R134–R136, February 18, 2003, ©2003 Elsevier Science Ltd. PII S0960-9822(03)00074-5; Categorization of humans in biomedical research: genes, race and disease -- Genome Biology 2002.

Racial brain size differences: Whole Brain Size and General Mental Ability: A Review, Int J Neurosci. 2009 Apr; 119(5): 692–732, PMCID: PMC2668913. Rutgers Anthropologist Sets Record Straight on Brain Size and Race. A NYT article that shows claims of racism in measuring skulls was false: Scientists Measure the Accuracy of a Racism Claim. Mismeasuring Skulls: New Research Resolves Historical Controversy, Shows Science Resists Bias; Stanford Department of Anthropology. Brain size, IQ, and racial-group differences: Evidence from musculoskeletal traits, J.Philippe Rushton, Intelligence Volume 31, Issue 2, March–April 2003, Pages 139–155. Thirty Years of Research on Race Differences in Cognitive Ability, Psychology, Public Policy, and Law, 2005, Vol. 11, No. 2, 235–294, Copyright 2005 by the American Psychological Association, DOI: 10.1037/1076-8971.11.2.235

Genetic Distance:
ESTIMATION OF THE COANCESTRY COEFFICIENT: BASIS FOR A SHORT-TERM GENETIC DISTANCE
John Reynolds, B. S. Weir, C. Clark Cockerham
Genetics November 1, 1983 vol. 105 no. 3 767-779
Number of ancestral human species: a molecular perspective
D. Curnoe, A. Thorne
doi:10.1078/0018-442X-00051 

Heritibility of intelligence: Molecular Psychiatry (2015) 20, 98–108; doi:10.1038/mp.2014.105; published online 16 September 2014, Genetics and intelligence differences: five special findings; Common DNA Markers Can Account for More Than Half of the Genetic Influence on Cognitive Abilities, Genetic contributions to variation in general cognitive function: a meta-analysis of genome-wide association studies in the CHARGE consortium (N=53949).
One standard deviation racial IQ gap by age three: (Broman et al, Montie and Fagan, Brooks-Gunn, Klebanov and Duncan)


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