Talk:Race and intelligence/unstable version

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While the distributions of IQ scores among different racial-ethnic groups in the US overlap and often have a comparable range, groups differ in where their members cluster along the IQ scale.

Race and intelligence are broad terms with many meanings that are often used to describe and measure human beings. The possibility of a relationship between race and intelligence has been a topic of considerable speculation, study, and debate, especially since the 19th century. The contemporary debate focuses on the nature, causes, and importance of racial and ethnic differences in intelligence test scores and other measures of cognitive ability. In the 19th and early 20th centuries research on race and intelligence was often used to argue that one race was superior to another, justifying poor outcomes and treatment for the "inferior race". Some early opinions about the differences among races grew out of stereotypes about non-whites developed during the period of colonialism and slavery.

Modern theories and research on race and intelligence are often grounded in two controversial assumptions:

• the social categories of race and ethnicity are concordant with genetic categories, such as biogeographic ancestry.
• Intelligence is quantitatively measurable (see psychometrics) by modern tests and is dominated by a unitary general cognitive ability.

Much of the evidence currently cited is based on IQ testing in the United States. There is much less data from other nations, in particular the developing world, and conclusions from the US data cannot automatically be generalized to the world as a whole. While the distributions of IQ scores among different racial-ethnic groups in the US overlap and often have a comparable range, groups differ in where their members cluster along the IQ scale. Similar clustering has been reported with related variables, such as school achievement, reaction time, and brain size. Most variation in IQ in the U.S. occurs within individual families, not between races. However, even small differences in average IQ at the group level might theoretically have large effects on social outcomes.

Several hypotheses have been proposed to explain why average IQ varies among racial-ethnic groups. Certain environmental factors, such as nutrition, are thought to moderate IQ in children, and other influences have been hypothesized, including education level, richness of the early home environment, and other social, cultural, or economic factors. The primary focus of the scientific debate is whether group IQ differences also reflect a genetic component. Hereditarianism hypothesizes that a genetic contribution to intelligence could include genes linked to neuron structure or function, brain size or metabolism, or other physiological differences which could vary with biogeographic ancestry.

The findings of this field have engendered significant controversy. Press coverage has given considerable positive attention to theories of genetic racial differences in intelligence even though there is no consensus among researchers regarding their validity. Upon publication, The Bell Curve, a controversial book that asserted that the gap in black and white IQ scores was, in part, genetic, received a great deal of positive publicity, including cover stories in Newsweek The New Republic, and The New York Times Book Review. Still, few strong propionates of the genetic theories of differences in intelligence do not think that press coverage has been positive enough. For example, media opinion of the role of genetic and environmental factors in explaining individual and group differences in IQ was studied in 1988 by conservative researchers Mark Snyderman and Stanley Rothman. They found it to differ from the opinion of mainstream experts.

Some critics question the fairness and validity of cognitive testing and racial categorization, as well as the reliability of the studies and the motives of the authors, on both sides. This has included accusations of bias based on the political ideals of the researchers or the funding agencies, such as the Pioneer Fund. Some critics fear the misuse of the research, question its utility, or feel that comparing the intelligence of racial groups is itself unethical. The disparity in average IQ among racial groups does not mean that all members of one group are more intelligent than all members of another. Robert A. Gordon, a Pioneer Fund media critic, ranking group averages "high" to "low" is not the same things as moral ranking from "good" to "bad" or an overall ranking of "superior" to "inferior". The conclusions of a few researchers: that racial groups in the US vary in average IQ scores, and the hypothesis that a genetic component may be involved, have led to heated academic debates that have spilled over into the public sphere.

Observations about race and intelligence also have important applications for critics of the media portrayal of different races. Stereotypes in media such as books, music, film, and television can reenforce old racist ideas and may influence the perceived opportunities for success in academics for minority students.

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Background information

History

Main article: Race and intelligence (history)

See also: Scientific racism

See also: Race (historical definitions)

The Moors speculated that Europeans might be congenitally incapable of abstract thought. By the 19th century most Europeans probably believed that they were congenitally superior to Africans in intellectual skills. In the 19th and early 20th century research on race and intelligence was often used to confirm that one race was 'superior' to another. Francisco Gil-White, author of Resurrecting Racism: The Modern Attack on Black People Using Phony Science and Stephen Jay Gould author of The Mismeasure of Man have suggested that some modern research has similar motives. Because the Atlantic slave trade raised moral questions from its inception scientific theories about the mental capacities of Black people were provided to justify the enslavement of Africans. Scientific arguments about the mental inferiority of Black people were instrumental in keeping slavery alive as in institution in the United States. It was widely regarded that Black people lacked the mental capacity to handle freedom. The writings of Sir Francis Galton, a British psychologist, spurred interest in the study of mental abilities, particularly as they relate to heredity and eugenics. Galton estimated from his field observations in Africa that the African people were 'two grades' below Anglo-Saxons' position in the normal frequency distribution of general mental ability his work was seen as scientific validation of Africans' mental inferiority compared with Anglo-Saxons.

The opinion that there are differences in the brain sizes and brain structures of different racial and ethnic groups was widely held and studied during the 19th century and early 20th century.[9] Average ethnic and racial group differences in IQ were first directly observed when analyzing the data from standardized mental tests administered on large scales during World War I.

The association of hereditarianism with Nazi Germany created an modern academic environment that has been very skeptical of suggestions that there are racial or ethnic differences in measures of intellectual or academic ability and that these differences are primarily determined by genetic factors. In 1961, the psychologist Henry Garrett coined the term equalitarian dogma to describe the then politically fashionable view that there were no race differences in intelligence, or if there were, they were purely the result of environmental factors. Reports on Jensen's article appeared in Time, Newsweek, Life, U.S. News & World Report, and The New York Times Magazine. Press attention returned to the issue of race and intelligence in 1994 with the publication of The Bell Curve, which included two chapters on the subject of racial difference in intelligence and related life outcomes. In response to The Bell Curve, Stephen Jay Gould updated The Mismeasure of Man in 1996. Among other things, he criticized the IQ test as a measure of intelligence, citing what he perceived as inherent racial and social biases as well as systematic flaws in the testing process.

Race

Main article: Race

See also: Race and multilocus allele clusters, Race (historical definitions)

Racial distinctions are generally made on the basis of skin color, facial features, inferred ancestry, national origin and self-identification in the United States. In an ongoing debate, some geneticists argue race is neither a meaningful concept nor a useful heuristic device, and even that genetic differences among groups are biologically meaningless, on the basis that more genetic variation exists within such races than among them, and that racial traits overlap without discrete boundaries. Concordant with this, a survey of cultural and physical anthropologists done in 1999 found that the concept of race was rejected by 69% of physical anthropologists and 80% of cultural anthropologists. Other geneticists, in contrast, argue that categories of self-identified race/ethnicity or biogeographic ancestry are both valid and useful, that these categories correspond with clusters inferred from multilocus genetic data, and that this correspondence implies that genetic factors might contribute to unexplained phenotypic variation between groups.

Worldwide, human populations are geographically bounded into five less than perfectly distinct continental areas: the Americas, Eurasia (including Europe, North Africa and West Asia), East Asia, Sub-Saharan Africa, and the Pacific Islands (including Australia). At least in the United States, self-identified racial labels correspond to geographic regions of genetic ancestry, with only a small number of individuals showing genetic cluster membership different from their self-identified race/ethnicity. People labeled Blacks have most of their ancestors from sub-Saharan Africa, Whites from Europe, the Middle East and North Africa, and East Asians from the north-western Pacific Rim. Hispanics form a genetically diverse group that includes many recent U.S. immigrants of mixed ancestry, and are more often called an ethnic group.

It is well known that many alleles vary in frequency across (and within) human populations. Most of this variation is selectively neutral, but a significant number show evidence of recent positive selection. These include genes involved in brain development and other neuronal functions, which have variants that have spread to high frequencies under selective pressure and now occur in substantially different frequencies in different global populations. The actual functions of these genes, and their effect, if any, on IQ is unknown. (Discussed below.)

The political, social and cultural structure of the United States is still weighted by race. It was only in the 1960s that racial discrimination became illegal in many areas of public and private life, including employment and housing, and some consider discrimination to remain prevalent. The national and state governments of the United States employ racial categorization in the census, law enforcement, and innumerable other ways. Many political organizations intend to represent the interests of specific racial groups. See the articles Race and Race (U.S. Census) for further discussion.

Race as a social construct

Robert J. Sternberg, Elena L. Grigorenko, and Kenneth K. Kidd write that the overwhelming portion of the literature on intelligence, race, and genetics is based on folk taxonomies rather than scientific analysis. Race, they write fits into no known genetic pattern. Race is a socially constructed concept, not a biological one. This concept of race serves a social rather than a biological purposes. Different types of parentage have, at various times and places, given rise to racial labeling (e.g., “Aryan race,” “German race,” and “Jewish race”). Hence race is a highly inconsistent concept. In contemporary North American society, Blacks and coloreds are considered to be one “race,” since any individual who possess any degree of nonwhiteness is automatically grouped in the Black category. (see: One drop rule) In other countries different racial grouping are often employed.

Intelligence testing

Main article: Intelligence

Further information: [[:Intelligence testing, intelligence quotient, general intelligence factor]]

Intelligence is most commonly measured using IQ tests. These tests are often geared to be good measures of the psychometric variable g (for general intelligence factor), and other tests that measure g (for example, the Armed Forces Qualifying Test and the SAT) also serve as measures of cognitive ability.

All such tests are often called "intelligence tests," though the use of the term "intelligence" is itself controversial. It is clear, however, that performance in these tests correlates with performance in similar life tasks (school grades and to a lower degree college grades). The correlation with many real-world results is lower. For example, while the correlation of IQ with job performance is strong, income is modestly correlated and accumulated wealth is only weakly correlated. The hereditary transmission of wealth via IQ is near zero. As commonly used, "IQ test" denotes any test of cognitive ability, and "IQ" is used as shorthand for scores on tests of cognitive ability. Some critics question the validity of all IQ testing or claim that there are aspects of "intelligence" not reflected in IQ tests. Historically, criticisms of the validity of IQ testing focused primarily on questions of "test bias", which has many related meanings. Several conclusions about tests of cognitive ability are now largely accepted by intelligence researchers:

• IQ scores measure many, but not all of the qualities that people mean by intelligent or smart (for example, IQ does not measure creativity, wisdom, or personality)
• IQ scores are fairly stable over much of a person's life
• IQ tests are predictive of school and job performance, to a degree that does not significantly vary by socio-economic or racial-ethnic background
• For people living in the prevailing conditions of the developed world, cognitive ability is substantially heritable, and while the impact of family environment on the IQ of children is substantial, after adolescence this effect becomes difficult to detect.

Research

Main article: Race and intelligence (Research)

File:Two Curve Bell with Jobs.jpg

These are idealized normal curves comparing the IQs of Blacks and Whites in the US in 1981. Source: Social Consequences by Gottfredson

Race and intelligence research tries to measure the gaps between different races or ethnicities and to find the causes for these gaps. The gaps found between the average measures of races or ethnicities varies depending on methods used for racial grouping, the method and setting used to test intelligence, the health and economic situation of the test takers, the interplay between the culture of the person taking the test and the culture of those who made the test, and the period in history when the test was performed.{{POV-statement}}

Test data

Average IQ scores of groups from North American, Europe and East Asia according to Lynn 2006. The normalization average of 100 is shown as a dotted line. Dozens of individual studies are represented. Datasets from South/Central America and Africa were criticized as being unrepresentative by a review of IQ and the Wealth of Nations, a previous book by Lynn.

Main article: Race and intelligence (test data)

The modern controversy surrounding intelligence and race focuses on the results of IQ studies conducted during the second half of the 20th century, mainly in the United States and some other industrialized nations. In almost every testing situation where tests were administered and evaluated correctly, a difference of approximately one standard deviation was observed in the US between the mean IQ score of Blacks and Whites. Attempted world-wide compilations of average IQ by race generally place Ashkenazi Jews at the top, followed by East Asians, Whites, other Asians, Arabs, Blacks and Australian Aborigines. See IQ and the Wealth of Nations for an attempted compilation of average IQ for different nations and a discussion of associated measurement problems. The IQ scores vary greatly among different nations for the same group. Blacks in Africa score much lower than Blacks in the US. Some reports indicate that the Black–White gap is smaller in the UK than in the U.S.^[4] Many studies also show large differences in IQ between different groups of Whites. For example, in Northern Ireland the IQ gap between Protestants and Catholics are as large as that between Blacks and Whites in the US. For example, in Israel, large gaps in test scores and achievement separate Ashkenazi Jews from other groups such as the Sephardi.^[5]

Gaps are seen in other tests of cognitive ability or aptitude, including university admission exams such as the SAT and GRE as well as employment tests for corporate settings and the military (Roth et al. 2001). Measures of school achievement correlate fairly well with IQ, especially in younger children. In the United States, achievement tests find that by 12th grade Black students are performing on average only as well as White and Asian students in 8th grade; Hispanic students do only slightly better than Blacks. Whether the gaps are narrowing or not is debated.

Explanations

Main article: Race and intelligence (Explanations)

The consensus among intelligence researchers is that IQ differences between individuals of the same race reflect (1) real, (2) functionally/socially significant, and (3) substantially genetic differences in the general intelligence factor. A consensus also exists for the view that average IQ differences between races reflect (1) real and (2) significant differences in the same g factor.^[6] However, it is a matter of debate whether IQ differences between races in the U.S. are (3a) entirely environmental or (3b) partly genetic. Several published consensus statements agree that the large differences between the average IQ scores of Blacks and Whites in the U.S. cannot be attributed to biases in test construction, nor can they be explained just by simple differences in socio-economic status. It should be noted that most research has been done in the US and a few other developed nations. That research cannot directly be generalized to the world as a whole. Blacks in the US do not constitute a random sample from Africa, and environmental conditions differ among nations. IQ tests done in developing countries are likely to have been affected by conditions associated with poverty that are common in the developing world, such as nutritional deficiencies and the impact of diseases (e.g., HIV, anemia or chronic parasites that may affect IQ test scores).

Regarding the IQ gaps in the U.S., it has also been suggested that Black culture disfavors academic achievement and fosters an environment that is damaging to IQ (Boykin, 1994). Likewise, it is argued that a persistence of racism reinforces this negative effect. John Ogbu (1978, 1994) has developed a hypothesis that the condition of being a "caste-like minority" affects motivation and achievement, depressing IQ. Many anthropologists have argued that intelligence is a cultural category; some cultures emphasize speed and competition more than others, for example. Even proponents of the view that the IQ gap is caused partly by genetic differences recognize that non-genetic factors are likely involved. Non-genetic biological factors that affect IQ have been proposed. Increased rates of low birth weight babies and lower rates of breastfeeding in Blacks as compared to Whites are some factors of many that have been proposed to affect the IQ gap. The Flynn effect is often cited as evidence that average IQ scores have changed greatly and rapidly, for reasons poorly understood, noting that average IQ in the US may have been below 75 before the start of this effect, and thus some argue that the IQ gap between races could change in the future or is changing, especially if the effect started earlier for Whites.

Arthur Jensen and others have concluded that the IQ gap is partly genetic. They argue that while plausible environmental explanation for the lower mean IQ in Blacks in the U.S. can be offered in many cases, these explanations are less capable of explaining the higher average IQ of East Asians than Whites, and that overall the culture-only hypothesis is not "progressive" but "degenerating" (see Lakatos; Rushton & Jensen, 2005). To support these claims, they most often cite: (1) worldwide Black-White-East Asian differences in IQ, reaction time, and brain size; (2) correlation between the extent to which IQ subtests measure g, the magnitude of Black-White-East Asian average IQ differences on those subtests (called Spearman's hypothesis), and measures of those subtests' heritability; and (3) the rising heritability of IQ with age (within races) and the disappearance by adulthood of shared environmental effects on IQ (e.g., family income, education, and home environment). Other evidence, such as transracial adoption, racial admixture studies, "life-history" traits, and evolutionary explanations are also debated. The critics have counter arguments to all of this and a definite answer may not be possible until intelligence is directly linked to specific genes.

Interpretations

Main article: Race and intelligence (interpretations)

File:Two Curve Bell with Jobs.jpg

These are idealized normal curves comparing the IQs of Blacks and Whites in the US in 1981 annotated with training and career prospects from the Wonderlic Test

Small differences in IQ, while relatively unimportant at the level of an individual, could theoretically have large effects for the United States population as a whole. As a demonstration of these possible effects, Herrnstein and Murray 1994 used a resampling technique to argue that, all else equal, a simulated 3-point drop in average IQ had little effect on factors like marriage, divorce, or unemployment. However, their study found that a simulated drop in IQ from 100 to 97-points increased poverty rates by 11% and the proportion of children living in poverty by 13%. In the simulation, similar rises occurred in rates of children born to single mothers, men in jail, high school drop-out, and men prevented from working due to health-related problems. In contrast, when they simulated an increase in average IQ of 3-points to 103, they calculated that poverty rates fell 25%, children living in poverty fell 20%, and high school drop-out rates fell 28%. Professors James Heckman and Nicholas Lemann, as well as several other scholars and scientists have the criticized validity and reliability of the data which led to the aforementioned findings by Herrnstein and Murray 1994.

According to Murray and Herrnsteins' Bell Curve, when IQ is statistically controlled for, the probability of having a college degree or working in a high-IQ occupation is higher for Blacks than Whites. Controlling for IQ shrinks the income gap from thousands to a few hundred dollars. Controlling for IQ cuts differential poverty by about three-quarters and unemployment differences by half. However, controlling for IQ has little effect on differential marriage rates. For many other factors, controlling for IQ eliminates the differences between Whites and Hispanics, but the Black-White gap remains (albeit smaller).

Some people have attributed differential economic growth between nations to differences in the intelligence of their populations. One example is Richard Lynn's IQ and the Wealth of Nations. The book is sharply criticized in the peer-reviewed paper The Impact of National IQ on Income and Growth. Another peer-reviewed paper, Intelligence, Human Capital, and Economic Growth: An Extreme-Bounds Analysis, finds a strong connection between intelligence and economic growth. Jared Diamond's Guns, Germs and Steel instead argues that historical differences in economic and technological development for different areas can be explained by differences in geography (which affects factors like population density and spread of new technology) and differences in available crops and domesticatable animals.

Media portrayal

Scientific Racism from an American magazine, Harper’s Weekly, says that the Irish are similar to 'Negroes' and wonders why both groups are not extinct.

Some regard Jar Jar as thinly veiled version of the type of portrayals used in minstrelsy to lampoon the supposed stupidity of Black people.

Main article: Race and intelligence (Media portrayal)

See also: Acting white

Race and intelligence are sometimes portrayed as related in media. People of various races have been portrayed as more or less intelligent in media such as films, books, and newspapers. Likewise, reporting on research into race and intelligence has been criticized: either for giving scientific theories of race too much credit, or for rejecting the theories of some researchers in the name of racial harmony.

Critics of contemporary media have highlighted portrayals of minorities as less intelligent (or in the case of Asians, on occasion more intelligent) in films and movies. Entman and Rojeki assert that media images of Blacks may have profound effects on the perceptions by both Blacks and Whites about black intellectual potential.

Even so-called positive images of Black people can lead to stereotypes about intelligence. In Darwin's Athletes: how sport has damaged Black America and preserved the myth of race John Hoberman writes that the prominence of African-American athletes encourages a de-emphasis on academic achievement in black communities.Film director Spike Lee explains that these images have negative impacts "In my neighborhood, we looked up to athletes, guys who got the ladies, and intelligent people," said Lee. "[Now] If you're intelligent, you're called a white guy or girl."

Blacks are not the only ethnic group in the US to be stereotyped as stupid. Shortly after the large waves of immigration in the 19th century and number of immigrant groups such as the Irish were stereotyped as being more closely related to apes or dogs and therefore intellectually inferior. This changed after the definition of "white" was expanded to include the Irish. Unlike other racial stereotypes of intelligence, the 19th century psudo-scientific ideas about of Irish stupidity and inferiority are not supported by most hereditarian proponents of modern race research. Other stereotypes, of Blacks, Jews and Asians endure to this day as do the findings of Hereditarian researchers about these groups.

Other important aspects of the media portrayal of race and intelligence include recent books asserting a genetic cause to group differences, as well as various surveys and consensus statements made by various groups of scientists.

Controversies

Main article: Race and intelligence (Controversies)

Utility of research

Main article: Race and intelligence (Utility of research)

Theories of race and intelligence have been challenged on grounds of their utility. Critics want to know what purpose such research could serve and why it has been an intense an area of focus for a few researchers. Some defend the research, saying it has egalitarian aims or that it is pure science, others say that the true motivation for the research is the same as that of the eugenics movement and other forms of scientific racism. Even supporters of intelligence research have described such research as analogous to "working with dynamite" or "dangerous play" in sports.

As to whether research in this area is desirable, John C. Loehlin wrote in 1992, "Research on racial differences in intelligence is desirable if the research is appropriately motivated, honestly done, and adequately communicated." [emphasis original] Defenders of the research suggest that both scientific curiosity and a desire to draw benefits from the research are appropriate motivations. Researchers such as Richard Lynn have suggested that conclusions from the research can help make political decisions, such as the type of educational opportunities and expectations of achievement policy makers should have for people of different races. Researchers such as Charles Murray have used their conclusions to criticize social programs based on racial equality that fail in Murray's eyes to recognize the realities of racial differences.

Sociologist and demographer Reanne Frank says that some race and intelligence research has been abused "The most malignant are the "true believers," who subscribe to the typological distinctions that imply hierarchical rankings of worth across different races. Although this group remains small, the members' work is often widely publicized and well known (e.g., Herrnstein and Murray 1994; Rushton 1991)"

Potential for bias

Main article: Race and intelligence (Potential for bias)

Proponents of genetic explanations of race/IQ correlation have often been criticized both of scientific misconduct and of their intimate links with groups that have historic ties to Nazis and eugenics of the early 19th century, such as the Pioneer Fund. The Pioneer Fund has been characterized by the Southern Poverty Law Center as a hate group.

Proponents of genetic explanations of race/IQ correlation have in turn accused their critics of suppressing scientific debate in the name of political correctness. They claim harassment and interference with both their work and funding.

Policy implications

See also: Intelligence and public policy

Public policy implications of IQ and race research are one of the greatest sources of controversy surrounding this issue. Regardless of the source of the gap, most educators agree that it must be addressed. They often advocate equitable funding for education.

Some proponents of a genetic interpretation of the IQ gap, such as Rushton and Jensen 2005a and Gottfredson 2005b, have sometimes argued that their interpretation does not in itself demand any particular policy response: while a conservative/libertarian commentator may feel the results justify, for example, reductions in affirmative action, a liberal commentator may argue from a Rawlsian point of view (that genetic advantages are undeserved and unjust) for substantial affirmative action. Since all races have representatives at all levels of the IQ curve, this means any policy based on low IQ affects members of all races.

According to the "Mainstream Science on Intelligence" statement published in Intelligence in 1997:

The research findings neither dictate nor preclude any particular social policy, because they can never determine our goals. They can, however, help us estimate the likely success and side-effects of pursuing those goals via different means.

While not specifically race-related, policies focused on geographical regions or nations may have disproportionate influences on certain racial groups and on cognitive development. Differences in health care, nutrition, regulation of environmental toxins, and geographic distribution of diseases and control strategies between the developing world and developed nations have all been subjects of policies or policy recommendations (see health and nutrition policies relating to intelligence).

Finally, germinal choice technology may one day be able to select or change directly alleles found to influence intelligence or racially identifying traits (such as skin color; see gene SLC24A5), making them susceptible to biotechnological intervention.

End material

See also

• Ashkenazi intelligence
• Brain to body mass ratio
• Craniometry
• Hominid intelligence
• Neuroscience and intelligence
• Height and intelligence
• Race and crime
• Sex and intelligence
• Scientific racism
• The Mismeasure of Man

References

Main article: Race and intelligence (References)

External links

Collective Statements

• The Wall Street Journal: Mainstream Science on IntelligencePDF
• APA Task Force Examines the Knowns and Unknowns of Intelligence
• Statement on "Race" and Intelligence. American Anthropological Association. Adopted December 1994.

Review Papers

• James Flynn and Charles Murray debate - news summary
• June 2005 issue of Psychology, Public Policy, and Law, Vol. 11, No. 2.
  • Thirty Years of Research on Race Differences in Cognitive Ability J. Philippe Rushton & Arthur R. Jensen
  • There Are No Public-Policy Implications Robert J. Sternberg
  • What if the Hereditarian Hypothesis is True? Linda S. Gottfredson
  • Heredity, Environment, and Race Differences in IQ Richard E. Nisbett
  • The Cultural Malleability of Intelligence and Its Impact on the Racial/Ethnic Hierarchy Lisa Suzuki & Joshua Aronson
  • Wanted: More Race Realism, Less Moralistic Fallacy J. Philippe Rushton & Arthur R. Jensen
• Race, Genetics and IQ Richard E. Nisbett (PDF)
• The Inequality Taboo Charles Murray archived version
• The Black-White Test Score Gap (1998) online (page-image) version of ISBN 0-8157-4609-1

Others

• Crippled by Their Culture - Race doesn't hold back America's black rednecks. Nor does racism by Thomas Sowell
• Race and IQ: Part 1, Part 2, Part 3 by Thomas Sowell
• The Skeptic's Dictionary entry on IQ and race
• (Skeptic Magazine): Two book reviews, by Paul R. Gross and Alondra Oubre, of Sarich’s and Miele’s book, Race: The Reality of Human Differences
• Criticism on source material of Bell Curve book
• Poverty and Brain Development in Early Childhood 1999 report
• Miscellaneous articles by Richard Lynn et al.
• Are IQ Tests Biased?
• Scholars Provide an Overview of Explanations for Black-White Test Score Gap
• School Readiness: Closing Racial and Ethnic Gaps
• La Griffe du Lion - pseudonymously released statistical analyses on this and related subjects. (Review)
• A review of the field (Jan. 2006) Kohn, Marek, "This racist undercurrent in the tide of genetic research: As taboos fall away, there's a danger that denial of racial difference will be replaced with uncritical acceptance," The Guardian.
• The Lessons of the Ashkenazim: Groups and Genes, Steven Pinker, June 2006, The New Republic.
• Are all races equally intelligent? -- Or: When is knowledge knowledge? by John J. Ray
• Black-White Gap in IQ Scores Closing, Study Finds

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