John Philippe (Phil) Rushton (born December 3, 1943) is a psychology professor at the University of Western Ontario, Canada, who is most widely known for his controversial work on intelligence and racial differences, and also researches altruism.E.g. Rushton, J. P., & Bons, T. A. (2005). Mate choice and friendship in twins: Evidence for genetic similarity (PDF). Psychological Science, 16, 555-559.
Rushton currently sits on the editorial board of Intelligence,Publisherand is a fellow of the American Association for the Advancement of Science, the American, British, and Canadian Psychological Associations. He was a fellow of the John Simon Guggenheim Memorial Foundation in 1988, and holds a D.Sc in psychology from the University of London and a Ph.D in social psychology from the London School of Economics and Political Science. He is the current head of the Pioneer Fund.Pioneer Fund [http://www.pioneerfund.org/Board.html board summary; Racial Scientist Rushton Takes Over Pioneer Fund
=Biography= Rushton was born in Bournemouth, England. During his childhood, he emigrated with his family to South Africa where he lived from age 4 to 8 (1948-1952) in the apartheid era.Rushton's letter on the evolutionary psychology Yahoo group Later, Rushton moved to Canada.Rushton's faculty page.* His father was a building contractor, and his mother, from whom he received his middle name, was French. Rushton received a B.Sc in psychology from Birbeck College at the University of London in 1970 and in 1973 received his Ph.D from the London School of Economics, working on altruism in children. He then moved to the University of Oxford where he continued his work until 1974.
Rushton taught at York University in Canada from 1974-1976 and the University of Toronto until 1977. He then moved to the University of Western Ontario, and was made a full professor there in 1985. He received his D.Sc. from London in 1992.
Rushton has published more than 100 papers and articles, written a number of books, including a pair on altruism, one on 'scientific excellence', and a psychology text (co-authored). In 1988 he was awarded a John Simon Guggenheim Fellowship. Following his work on behavioral genetics and sociobiology Rushton began studying racial differences.
=Work=
His hypothesis is also challenged by counter examples indicating hostility between genetically similar groups, and peace between genetically different groups. A critique by John Tooby & Leda Cosmides stated, "For example, immigrants originally from neighboring villages in Italy were prevented from working together because of the serious violence that would erupt; yet these same individuals lived peacefully among Chinese immigrants (Sowell 1981)."Kin selection, genic selection, and information-dependent strategies by John Tooby & Leda Cosmides (1989). Behavioral and Brain Sciences 12, 542-544.
Fellow Pioneer Fund scholar Linda Gottredson has written favorably regarding Rushton's theory:
The data are startling for the uniniated. For example, spouses and close friends tend to be most alike on the most heritable traits.
| Chart 1 - Average Differences Among Blacks, Whites, and Orientals | from Race, Evolution, and Behavior
|||
| Blacks | Whites | Orientals¹ | |
| Brain size | |||
| Cranial capacity | 1,267 | 1,347 | 1,364 |
| Cortical neurons (millions) | 13,185 | 13,665 | 13,767 |
| Intelligence | |||
| IQ test scores | 85 | 100 | 106 |
| Cultural achievements | Low | High | High |
| Reproduction | |||
| 2-egg twinning (per 1000 births) | 16 | 8 | 4 |
| Hormone levels | Higher | Intermediate | Lower |
| Sex characteristics | Larger | Intermediate | Smaller |
| Intercourse frequencies | Higher | Intermediate | Lower |
| Permissive attitudes | Higher | Intermediate | Lower |
| Sexually transmitted diseases | Higher | Intermediate | Lower |
| Personality | |||
| Aggressiveness | Higher | Intermediate | Lower |
| Cautiousness | Lower | Intermediate | Higher |
| Impulsivity | Higher | Intermediate | Lower |
| Self-concept | Higher | Intermediate | Lower |
| Sociability | Higher | Intermediate | Lower |
| Maturation | |||
| Gestation time | Shorter | Longer | Longer |
| Skeletal development | Earlier | Intermediate | Later |
| Motor development | Earlier | Intermediate | Later |
| Dental development | Earlier | Intermediate | Later |
| Age of first intercourse | Earlier | Intermediate | Later |
| Age of first pregnancy | Earlier | Intermediate | Later |
| Lifespan | Shorter | Intermediate | Longer |
| Social organization | |||
| Marital stability | Lower | Intermediate | Higher |
| Law abidingness | Lower | Intermediate | Higher |
| Mental health | Low | Intermediate | Higher |
| Source: Unabridged edition, ''Race, Evolution, and Behavior (p. 5). | |||
Rushton wrote the book Race, Evolution And Behavior: A Life History Perspective, in which he outlines an extremely controversial theory of virtually every aspect of human nature and the course of world history. Rushton argues that there are three main "races" of human-kind, Mongoloids (i.e. Orientals), Caucasoids (i.e. whites), and Negroids (i.e. blacks). He further asserts that these group fall persistently and repeatedly into the same one-two-three pattern when compared on a list of 60 different behavioral and anatomical variables. Rushton uses averages of hundreds of studies, modern and historical, to assert the existence of this pattern.
The book grew out of his earlier paper, Evolutionary Biology and Heritable Traits , which was presented at the Symposium on Evolutionary Theory, Economics and Political Science, AAAS Annual Meeting (San Francisco, CA, January 19, 1989).
The book argues that Mongoloids, on average, are at one end of a continuum, that Negroids, on average, are at the opposite end of that continuum, and that Caucasoids rank in between Mongoloids and Negroids, but closer to Mongoloids. His continuum includes both external physical characteristics and personality traits.
Citing genetic research by Cavalli-Sforza, the African Eve hypothesis, and the out of Africa theory, Rushton concludes that Negroids branched off first (200,000 years ago, Caucasoids second 110,000 years ago, and Mongoloids last 41,000 years ago), arguing that throughout all of evolution, more ancient forms of life (i.e. plants, bacteria, reptiles) are less evolved than more recent forms of life (i.e. mammals, primates, humans) and that the much smaller variation in the races is consistent with this trend. "One theoretical possibility," said Rushton "is that evolution is progressive and that some populations are more advanced than others" Rushton argues that this first, second, and third chronological sequence perfectly correlates with, and is responsible for, a consistent global multi-dimensional racial pattern on everything from worldwide crime statistics, the global distribution of AIDS, to personality.
Rushton argues that if his model proves to be accurate then two important predictions can be made. First, that Mongoloid populations, owing to their higher intelligence, could be expected to outdistance the predominantly Caucasoid populations of the Western world. Second, that the Negroid population's comparatively higher rates of sexual activity made them especially at risk for AIDS.
Rushton says that his collection of 60 different variables can be unified by a single evolutionary dimension known as the r and K scale. His theory attempts to apply the inter-species r/K selection theory to the much smaller inter-racial differences within the human species. While all humans display extremely K-selected behavior, Rushton believes the "races" vary in the degree to which they exhibit that behavior. He asserts that Negroids use a strategy more toward an r-selected strategy (produce more offspring, but provide less care for them) while Mongoloids use the K strategy most (produce fewer offspring but provide more care for them), with Caucasoids exhibiting intermediate tendencies in this area. He further asserts that Caucasoids evolved more toward a K-selected breeding strategy than Negroids because of the harsher and colder weather encountered in Europe, while the same held true to a greater extent for Mongoloids. Rushton argues that the survival challenges of making warm clothes, building durable shelter, preserving food, and strategically hunting large animals all selected genes for greater intelligence and social organization among the populations that migrated to cold climates.
Although Rushton acknowledges socio-economic and cultural factors, he argues that they are more likely to be the product than the cause of a lot of the differences he describes. He asserts for example, "that many African-American youth have adopted a culture of anti-intellectualism", implying that their decisions about culture are based on their IQ, which he sees as based on their race.
While Rushton acknowledges alternative interpretations, he argues that his collection of world-wide data is best explained by his r-k theory. Rushton agrees that contemporary social and economic trends obviously confound the data he describes within any particular time and place (i.e. 20th century America), but he argues that this does not effect his assertion that there is an ancient gene mediated evolutionary hierarchy implied by his alleged behavioral consistency of the "races" all over the world, throughout the course of world history, along with his alleged anatomical spectrum of brain weight and penis size.
A number of scientists however find sufficient problems with his methodology to completely dismiss his conclusions. Douglas Wahlsten, a biologist, criticized Rushton's book in a review writing:
averaging does nothing to reduce bias in sampling and measurement, and such flaws are abundant in the cited literature. For example, among the 38 reports on brain weight, all but two gave figures for only one group, with most cases being people living in the nation of their ancestors, such as an article on Japanese living in Japan and another on Kenyans living in Kenya. The obvious differences in environment make all of these data of dubious worth for testing hypotheses about genetic causes of group differences.Book Review of Race, Evolution and Behavior
David P. Barash also harshly criticises the 'principle of aggregation' in his review:
...Rushton argues at length for what he calls the 'principle of aggregation', which in his hands, means the pious hope that by combining numerous little turds of variously tainted data, one can obtain a valuable result; but in fact, the outcome is merely a larger than average pile of shit
Wahlsten also further criticizes Rushton's particular use of data in the same book review:
The author is an earnest believer in genetically determined race differences, and he vows to cling tenaciously to his world view unless his opponents can provide conclusive proof to the contrary. In my opinion, this is the kind of approach to be expected from religious zealots and politicians, not professional scientists. A rigorous evaluation of the evidence cited by Rushton reveals the methods in most studies were seriously flawed and render the data inconclusive. If the evidence is so poor, the proper action for a scientist is to suspend judgment. In reality, there is not one properly controlled study of brain size comparing representative samples of races in the entire world literature.Book Review of Race, Evolution and Behavior
As Wahlsten points out, Rushton's only defense of his methodology is challenging his critics to explain how his averaging all the studies in the world-wide literature has produced a pattern on such a diverse collection of variables with Negroids and Mongoloids falling so persistently at opposite extremes and Caucasoids always in the middle. Rushton dismisses any critical analysis of the data he has used, and instead suggests that the onus is on his critics to gather new data using modern techniques. Rushton has stated, "Identifying potential problems in particular studies should lead to calls for additional research, not trenchant acceptance of the null hypothesis. Deconstructing data has led to erroneous dismissal of fascinating brain-behavior relationships for six decades."
In a 1996 review of the book, anthropologist C. Loring Brace wrote that "Race, Evolution, and Behavior is an amalgamation of bad biology and inexcusable anthropology. It is not science but advocacy, and advocacy of 'racialism'" (Brace 1996). Brace argues that Rushton assumes the existence of three biological races with no evidence except Rushton's speculation as to what an extraterrestrial visitor to Earth would think. Brace also disagrees with Rushton applying the concept of heritability (normally applied in the context of individuals) to groups. Finally, Brace claims Rushton makes unsupported claims about sub-Saharan African societies.
Other critics have also charged that his interpretations, conclusions and methods are "sloppy" and "unscientific"Sloppy Statistics, Bogus Science and the Assault on Racial Equity.
Supporters, such as Charles Murray, co-author of The Bell Curve, have held more positive views of Rushton's methodologies:
Rushton is a serious scholar who has assembled serious data. Consider just one example: brain size. The empirical reality, verified by numerous modern studies, including several based on magnetic resonance imaging, is that a significant and substantial relationship does exist between brain size and measured intelligence after body size is taken into account and that the races do have different distributions of brain size.
Critics question Rushton's data on penis size, particularly one study, conducted in 1898 by an anonymous French Army surgeon who traveled through Africa and recorded the size of African penises, and from a second study comparing the penises of Nigerian medical students to Czech army officers. In this study, it turned out the Nigerians penises were longer, and the Czech's had greater circumference. Critics note that if penis girth is used instead of penis length, the Caucasoid sample averaged larger penises. Rushton counters that variablity among samples and overlapp between groups is to be expected, however when aggregating the world-wide literature as a whole, he finds that Negroid penises are not only longest, but thickest also. Rushton points out that almost any confirmed hypothesis can be discredited if one only looks at subsets of data, and does not believe such an approach is useful for making progress in science. Rushton cites studies World Health Organization studies in the United States showing that 9% of black men have penis circumferences exceeding 150 mm, while only 5% of White men do. (See #Questionable methodology for more information regarding Rushton's "aggregation" methodology)
Rushton referred to three WHO cited studies on penis size (used for procurement policies regarding condom size) to bolster his assertions regarding geographic distributions of penis size based on race.FHI Report Further FHI studies indicated no significant breakage and slippage rates for condoms based on racial groups, however, challenging the other studies.Neupane S, Abeywickrema D, Martinez K, et al. Acceptability and Actual Use Breakage and Slippage Rates of Standard and Smaller Latex Condoms: Nepal and Sri Lanka. Durham, NC: Family Health International, 1992.Joanis C, Brookshire T, Piedrahita C, et al. Evaluation of Two Condom Designs: A Comparison of Standard and Larger Condoms in Ghana, Kenya, and Mali. Durham, NC: Family Health International, 1990.Andrada A, Ravelo N, Spruyt A, et al. Acceptability and Functionality of Standard and Smaller Latex Condoms during Human Use: Philippines. Durham, NC: Family Health International, 1993.
Defenders of Rushton, such as Arthur Jensen, argue that race is a valid biological categorization. Cavalli-SforzaCavalli-Sforza, whose genetic research is cited by Rushton, considers all racial classifications to be arbitrary. Rushton, however, argues that the genetic linkage trees that Cavalli-Sforza provides clearly show distinct branches for all the three main races he describes. Gil-White, responding to these claims wrote:
Cavalli-Sforza’s trees show, for any geographically defined human population (say, North Asians) whether it is genetically closer to a second population (e.g. South Asians) than it is to a third (e.g. Europeans). But what these trees lack entirely is any information concerning the magnitude and sharpness of the differences between any two populations, and it is precisely this information that is needed to decide if a population is a biological race.
To see this a little better, consider the following. It stands to reason that my brother and I are more genetically similar than either of us is to our third cousin, but that hardly means my brother and I are in one race, and our third cousin in another. The same is true with populations. Cavalli-Sforza’s trees are a bit like the genealogical tree that would show my brother and I as more closely related to each other than to our third cousin: they show that two local populations are more genetically similar than either is to a third population which is farther away. However, these trees include no information about the magnitude of genetic differences between populations, which is why they can neither support nor undermine the claim that biological human races exist.Resurrecting Racism: The modern attack on black people using phony science. Chapter 3 by Francisco Gil-White
Despite the numerous scientific studies whose results contradict Rushton's basic claims
Various studies contradicting Rushton's work:
, supporters of Rushton assert that his focus on race is consistent with the work of forensic experts, research in bio-medicine, and biologists studying geographic variation in other species.
There have been genetics studies which have identified general correlations between self-identification of race/ethnicity, and genetic cluster membership, (Tang et al. 2005)The methodology of this study required severe classification constraints (e.g. the groups in question are assumed to be mutually exclusive with no multi-racial cases). Also, the study only looked at United States ethnic groups ("white", African-American, and Hispanic) and Taiwanese (East Asian) samples that would potentially obscure continuously distributed gene frequencies. In short, the results of these studies are not at all incompatible with Brace's concept of morphological diversity across geographic clines., which are cited by Rushton supporters - critics assert that it is a misinterpretation of them to suggest they support Rushton's positions.
Francisco Gil-White also challenges arbitrary categories of race on the basis of the lack of clear demarcations, acknowledging that biogeographic diversity exists, but has no sharp boundaries:
Partly to blame for the illusion that there are human races are run-of-the-mill perceptual and cognitive biases, and the rest of the blame goes to social conditioning, so that Americans end up with categories of ‘black,’ ‘white,’ and ‘yellow’ races that are solid and clearly defined in their heads. But what about the real world? In the real world, it turns out, there simply are no sharp boundaries dividing humanity into groups that correspond to these mental constructs. Resurrecting Racism: The modern attack on black people using phony science. Chapter 2 by Francisco Gil-White
Educational psychologist and fellow Pioneer Fund scholar Arthur Jensen, on page 420 of the the g factor defends the use of non-deterministic racial categories, writing:
Jensen continues on page 430-431 of the g factor, responding to Gil-White's challenges regarding Cavalli-Sforza's data:
The analysis Jensen cites recognizes 4 population groups, rather than the 3 recognized by Rushton. When graphed on a square after a PC analysis, Jensen roughly equates the top left, top right, and bottom right quadrents with "Mongoloids", "Caucasoids" and "Negroids" calling them "the three largest population groupings".
Although Jensen claims that a principal component analysis requires no decisions, the determination of when to stop extracting factors is in fact an arbitrary one:
"The decision of when to stop extracting factors basically depends on when there is only very little "random" variability left. The nature of this decision is arbitrary;"Principle Components and Factor Analysis Tutorial
Rushton has responded to the Flynn Effect by arguing that the low IQ's of pre-WWII whites have little to do with general intelligence (the g factor), while the low IQ's obtained by contemporary blacks (even in the third world) are somehow valid reflections of cognitive functioning. Defending his position, Rushton wrote:
principal components analysis shows that whereas the IQ gains over time on the WISC-R and the WISC-III do cluster, suggesting they are a reliable phenomenon, they are independent of the cluster of Black-White differences, inbreeding depression scores, and g factor loadings
Skeptics find that defense particularly weak, finding no reason to believe that a set of results that contradicts his hypothesis should be dismissed.
Jensen argues that because the bulk of the data on the Flynn Effect comes from after 1950 it is improper to extrapolate the data much further back in time. This would render part of Rushton's data ineligible for his aggregation methodology analysis, potentially affecting some of the results.
Rushton also points to a study by Fick that found that black African children obtained a mean IQ 35 points lower than whites in 1929, which he suggests may imply that the gap between the races has been constant, adjusting in lock-step with each other over the 20th century. Challengers of Rushton's argue that these studies are more appropriately explained by environmental and cultural conditions, and use the same large gap between past and present groups of the same "race" as prima facie evidence that environment has a greater effect than any racial genetics.
The r/K dimension is derived from an extremely wide range of species. Its dogmatic application to the drastically reduced variance within contemporary Homo sapiens is statistically naive (for more detailed explanations, see Cernovsky,at 1992). It is not even necessary to be a competent statistician to avoid similar errors. If Rushton (1988, 1990a) could heed Jerison's (1973) warning that racial differences in brain size are at most minor and "probably of no significance for intellectual differences," he would not attempt to extend Jerison' s findings across species to subgroups within modern mankind. Instead, Rushton (1991) misleadingly refers to Jerison in a manner that implies an expert support from this famous comparative neuropsychologist, without mentioning their disagreement on the most central issue.On the similarities of American blacks and whites: A reply to J.P. Rushton. Vol. 25, Journal of Black Studies, 07-01-1995, pp 672.
=Controversy and criticism= Popular science commentator David Suzuki protested the theory and spoke out against Rushton in a live televised debate at the University of Western Ontario. "There will always be Rushtons in science," Suzuki said "and we must always be prepared to root them out!". Rushton is accused by critics of advocating a new eugenics movement *, and is openly praised by proponents of eugenics.http://www.eugenics.net/ Website including prominent reference to Rushton's works
Rushton has been considered by many scholars to be more of a self-promoter than serious scientist. After mass mailing a booklet to psychology, sociology and anthropology professors across North America based on his racial papers, Hermann Helmuth, a professor of anthropology at Trent University, said, "It is in a way personal and political propaganda. There is no basis to his scientific research."UWO Gazette Volume 93, Issue 68 Tuesday, February 1, 2000 Psych prof accused of racism
Since 2002, Rushton has been the president of the controversial Pioneer Fund, which aims "to advance the scientific study of heredity and human differences." Rushton's work has received grants from the fund totalling over $1 million USD since 1981.
Rushton has sometimes been criticized for using the word "Oriental", when most North Americans use the term "Asian" instead. Since the 1990s, Asian American activists have begun campaigns to stop people from using the word Oriental, claiming the term has offensive connotations. However, the term is widely used non-pejoratively in Great Britain to denote people of Chinese, Japanese, or Korean ancestry, since the term "Asian" there has historically referred to people from the Indian Subcontinent.
Rushton has been associated with American Renaissance, a white nationalist monthly magazine. He has also written articles for VDARE, a right-wing anti-immigrant website.
Rushton's sources, such as semi-pornographic books and the Penthouse magazine, have been dismissed by other researchers, or have been criticized as extremely biased and inadequate reviews of the literature, or simply false There have also been many other criticisms of the theory ******." target="_blank" >Actual recent data show that blacks are not more psychopathic big five personality traits *," target="_blank" >differences in sex hormones between whites and East Asians are best explained by environmental differences *." target="_blank" > However, the rate of twin births in the US has doubled since 1971, the time of the study Rushton cited, due to older mothers (for which twin births are naturally more common) and fertility treatments,*
I think Phil is an honest and capable researcher ... The basic reasoning by Rushton is solid evolutionary reasoning; that is it's logically sound. If he had seen some apparent geographic variation for a non-human species-a species of sparrow or sparrow hawk, for example-no one would have batted an eye.
Psychologist David P. Barash wrote in a scholarly review:
I don't know which is worse, Rushton's scientific failings or his blatant racism. At least Rushton has a theory, namely, r- and K-selection. In brief, he argues that `Negroids' are relatively r-selected, `Mongoloids' K-selected, and `Caucasoids' in between. All racial distinctions are then seen to derive from this grand pattern, from differences in genital anatomy, to reproductive regimes, to IQ, etc. He even points to the higher frequency of low birth weight babies among black Americans, data that are undeniably consistent with an r-selection regime, but which might also be attributed to poor nutrition and insufficient prenatal care, and which, not coincidentally, have other implications for behaviour, IQ not the least. * Rushton wields r- and K-selection as a Procrustean bed, doing what he can to make the available data fit"
Barash ends his lengthy review with the sentence: "Bad science and virulent racial prejudice drip like pus from nearly every page of this despicable book".
Psychologist and Pioneer Fund scholar Arthur Jensen had a more favorable opinion:
This brilliant book is the most impressive theory-based study...of the psychological and behavioral differences between the major racial groups that I have encountered in the world literature on this subject.
Hans j. Eysenk of the University of London adds:
Professor Rushton is widely known and respected for the unusual combination of rigour and originality in his work....Few concerned with understanding the problems associated with race can afford to disregard this storehouse of well-integrated information which gives rise to a remarkable synthesis.
Psychologist and associate editor of the journal "Mankind Quarterly" Richard Lynn wrote:
Should, if there is any justice, receive a Nobel Prize.
Dr. Barry Mehler wrote critically of Rushton's misrepresentation of research he cites:
"Rushton's theories are a bizarre mélange of nineteenth century anthro-pometrism and twentieth century eugenics. Although there is no evidence showing different cranial sizes between races, Rushton has cited the genetic distance studies of Allen Wilson of the University of California to claim that Africans have smaller brains and are more primitive than whites and orientals, who evolved to cope with the more demanding northern climes. Wilson commented: 'He is misrepresenting our findings'. These 'show that Asians are as closely related to modern Africans as Europeans are'. When asked if he was aware of any anthropological evidence at all that might support Rushton's claim, he replied, 'I'm not aware of any such evidence. The claim shocks and dismays me'.Foundation for Fascism: the New Eugenics Movement in the United States, Patterns of Prejudice by Dr. Barry Mehler
Dr. Mark Feldman, Stanford University Population Biologist and recognized authority on r/K selection theory, claims that r/K is "absolutely inapplicable" to differences between humans. Feldman concluded that Rushton's work "doesn't really classify as science ... it has no content, it is laughable".CBC Radio, 18 February 1989
Pioneer Fund scholar Christopher Brand said:
The media and even the scientists themselves can hedge and fudge all they like, but their favorite "post-modern" pretense that there is no such thing as race is looking sillier all the time.
Earlier, these researchers showed these genetic variations to be much more frequent in humans than in other mammals, though the chimpanzees, who are closest to humans in DNA, showed levels that suggest significant evolution in the direction of humans. This work has been carried out under the direction of a Dr. Bruce Lahn whose team had studied the prevalence of variants of two genes that are disabled or damaged in human cases of severe microcephaly, in which the brain develops to only 30 percent its normal size. The fact that they are damaged in microcephalics is thought to indicate that they are necessary for normal brain growth.
Dr. Lahn's team examined the DNA of 1,184 people around the world-excluding racially mixed areas like North America, Russia and Australia. They estimated that one undamaged variation, microcephalin haplogroup D (sometimes called variation one, or V1) first appeared around 40,000 BC and has since spread to some 70 percent of humans. It is more common in Europe, Asia, South America and Latin America than in sub-Saharan Africa. At three percent, it is especially rare in Congo pygmies, who are at the bottom of black Africa's socio-economic ladder and along with Khoisans, split off the black family tree much earlier than other black groups. Some argue that if brain evolution occured as recently as Lahn's study seems to imply, than the ancient time periods when Rushton claims the "races" branched off has no evolutionary significance.
Dr. Lahn and colleagues noted that the arrival of V1 coincided roughly with the first signs of human habitation and agriculture; V2 appeared about the time of the first cities and the development of written language.
Ultimately, very little is known about the actual impact of these variants - the researchers caution that they may not have anything to do with cognition or intelligence at all.University of Chicago Chronicle, September 22, 2005, Vol. 25 No. 1 "Lahn’s analysis of genes indicates human brain continues to evolve."
Pioneer Fund scholar Christopher Brand has interpreted Lahn's study as supportive of Rushton:
The Chicago results are exactly what we would expect from the work of Professor Phil Rushton of University of Western Ontario, who has used modern brain scanning methods to establish a correlation as high as .40 between brain size and IQ.
A team at the University of California, Los Angeles, recently tested whether the gene variants studied by Lahn actually affect brain size. They studied DNA from 120 people whose brain volumes they had already measured using magnetic-resonance imaging. They didn't find any difference. Roger P. Woods, a UCLA brain-mapping expert stated, "It certainly makes you want to look at other explanations".
=End material=
1943 births | Canadian psychologists | Race and intelligence controversy | Human evolution | University of Western Ontario | Natives of Hampshire | London School of Differential Psychology | Alumni of Birkbeck, University of London | Alumni of the London School of Economics | Living people
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