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Richard Lynn

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Richard Lynn
Richard Lynn in Bristol, June 2008
Born1930
Bristol, United Kingdom
NationalityBritish
Alma materCambridge University
Known forRace and IQ
Scientific career
FieldsPsychology
InstitutionsUniversity of Ulster

Richard Lynn (born 1930) is a British Professor Emeritus of Psychology at the University of Ulster[1][2] who is known for his views on racial and ethnic differences.[3] His scientific style has been described as tenacious, creative and intuitive.[4]

Lynn was educated at Bristol Grammar School and Cambridge University in England. He has worked as lecturer in psychology at the University of Exeter, and as professor of psychology at the Economic and Social Research Institute, Dublin, and at the University of Ulster at Coleraine. He has written or co-written more than 11 books and 200 journal articles spanning five decades. Two of his recent books are on dysgenics and eugenics.

In the late 1970s, Lynn wrote that he found a higher average IQ in East Asians compared to Whites (5 points higher in his meta-analysis). In 1990, he proposed that the Flynn effect – an observed year-on-year rise in IQ scores around the world – could possibly be explained by improved nutrition, especially in early childhood.

Like much of the research in race and intelligence, Lynn's research is controversial. He is cited in the book The Bell Curve. He was also one of the 52 scientists who signed "Mainstream Science on Intelligence", an opinion piece in the Wall Street Journal.[5] He sits on the editorial boards of the journals Intelligence and Personality and Individual Differences.[6] He also sits on the boards of the Pioneer Fund, an organization that has been frequently described as racist in nature,[7] and of the Pioneer-supported journal Mankind Quarterly.[8]

Early life and career

Lynn is the son of the British botanicist Sydney Cross Harland (1891—1982), Fellow of the Royal Society known for his work on cotton genetics. His parents divorced when he was young and he only met his father again in 1949 upon his return from Peru to become Professor of Genetics at the University of Manchester.

Lynn was educated at Bristol Grammar School and Cambridge University in England.[2] He has worked as lecturer in psychology at the University of Exeter, and as professor of psychology at the Economic and Social Research Institute, Dublin, and at the University of Ulster at Coleraine.

Race differences in intelligence

Past works

Lynn's psychometric studies were cited in the 1994 book The Bell Curve and were criticized as part of the controversy surrounding that book.[citation needed] His article, "Skin color and intelligence in African Americans," 2002, Population and Environment, concludes that lightness of skin color in African-Americans is positively correlated with IQ, which he claims derives from the higher proportion of Caucasian admixture.[9]

In IQ and the Wealth of Nations (2002),[10] Lynn and co-author Tatu Vanhanen (University of Helsinki) argue that differences in national income (in the form of per capita gross domestic product) correlate with, and can be at least partially attributed to, differences in average national IQ. One study following up on Lynn and Vanhanen's hypothesis, "Temperature, skin color, per capita income, and IQ: An international perspective" (Templer and Arikawa, 2006),[11][12] is listed as the most downloaded article in Intelligence at ScienceDirect (Jan - March 2006).[13]

More recent works

Race Differences in Intelligence

Lynn's 2006 Race Differences in Intelligence: An Evolutionary Analysis[14] is the largest review of the global cognitive ability data. The book organizes the data by nine global regions,[verification needed] surveying 620 published studies from around the world, with a total of 813,778 tested individuals.

Lynn's meta-analysis lists the average IQ scores of East Asians (105), Europeans (99), Inuit (91), Southeast Asians and Amerindians each (87), Pacific Islanders ( 85), Middle Easterners (including South Asians and North Africans) (84), East and West Africans (67), Australian Aborigines (62) and Bushmen and Pygmies (54).[15][16][17]

Lynn has previously argued that nutrition is the best supported environmental explanation for variation in the lower range,[18] and a number of other environmental explanations have been advanced (see below). Ashkenazi Jews average 107-115 in the U.S. and Britain, but lower in Israel.[19] Lynn argues the surveyed studies have high reliability in the sense that different studies give similar results, and high validity in the sense that they correlate highly with performance in international studies of achievement in mathematics and science and with national economic development.

Following Race Differences in Intelligence, Lynn co-authored a further paper[20] along the lines of IQ and the Wealth of Nations with Jaan Mikk (Šiauliai University, Lithuania) - in press in Intelligence - and has co-authored a second book on the subject with Vanhanen, IQ and Global Inequality, which was published later in 2006.[21]

Another Lynn's book is The Global Bell Curve, published in June 2008.[22] In describing the book, Lynn says "it concludes that IQ is a key explanatory variable for the social sciences, analogous to gravity in physics."[23] It was reviewed by J. Philippe Rushton around the time of publication.[24]

Further information: Race_and_intelligence § IQ_differences_outside_of_the_USA

In a paper published in 2005 about the IQ in Mexico, Richard Lynn established that white mexicans had an IQ of 98, mestizos mexicans had an IQ of 94 and Indian mexicans had an IQ of 83, explaining the lower than expected IQ of Indians on their poor nutrition and other social factors. "Raven’s Standard Progressive Matrices test was administered to a representative sample of 920 white, Mestizo and Native Mexican Indian children aged 7–10 years in Mexico. The mean IQs in relation to a British mean of 100 obtained from the 1979 British standardization sample and adjusted for the estimated subsequent increase were: 98·0 for whites, 94·3 for Mestizos and 83·3 for Native Mexican Indians." [25]

In a recent paper in 2010 about IQ in Italy,[26] Lynn contends that IQs are highest in the north (103 in Friuli–Venezia Giulia) and lowest in the south (89 in Sicily) and correlated with average incomes, and with stature, infant mortality, literacy and education. The lack of any actual IQ test data in this paper was criticised.[27] According to him "the lower IQ in southern Italy may be attributable to genetic admixture with populations from the Near East and North Africa". While the few relevant studies indicate somewhat greater North African admixture in Italian samples as compared to the rest of Europe, the variation between the regions within Italy in admixture are extremely small.[28][29] In the same way, he thinks that this "also accounts for the IQs of around 90 for several countries in the Balkans whose populations are of partly European and partly Near Eastern origin."

Lynn's most recent book "The Chosen People: A Study of Jewish Intelligence and Achievement" (2011, ISBN 978-1593680367) provides a review of the studies of intelligence in both the Ashkenazic and non-Ashkenazic Jewish populations throughout the world.

Immigration

Lynn has spoken against immigration in Britain at a 2000 American Renaissance magazine sponsored conference, citing problems of unemployment, crime, illegitimacy, and low IQ, considering African and African-Caribbean immigants to perform worse in these measures than Indian and Chinese immigrants.[30] Lynn spoke on his book IQ and the Wealth of Nations at a 2002 American Renaissance conference.[31]

Sex differences in intelligence

Lynn's research correlating brain size and reaction time with measured intelligence led him to the problem that men and women have different-sized brains in proportion to their bodies, while consensus for the last hundred years has been that the two sexes perform equally on cognitive ability tests. In 1994, Lynn concluded in a meta-analysis that an IQ difference of roughly 4 points does appear from age 16 and onwards, but detection of this had been complicated by the faster rate of maturation of girls up to that point, which compensates for the IQ difference. This reassessment of male-female IQ has been bolstered with meta-analyses with Paul Irwing in 2004[32] and 2005[33] which found a difference of 4.6 to 5 IQ points (see BBC coverage).They saw no evidence that this is due primarily to the male advantage in spatial visualization, and concluded that some research previously presented as showing that there are no sex differences actually demonstrates the opposite. A further study of 1,258 11-year-olds in Mauritius derived a difference of more than 6 IQ points.[34]

Lynn and Irwing's findings are, of course, controversial.[35]

Dysgenics and eugenics

Dysgenics

In Dysgenics: Genetic Deterioration in Modern Populations, Lynn reviews [36] the history of eugenics, from the early writings of Bénédict Morel and Francis Galton through the rise of eugenics in the early 20th century and its subsequent collapse. He identifies three main concerns of eugenicists such as himself: deterioration in health, intelligence and conscientiousness. Lynn asserts that natural selection in pre-industrial societies favored traits such as intelligence and character but no longer do so in modern societies. He argues that due to the advance of medicine, selection against those with poor genes for health was relaxed.

Regarding intelligence, Lynn examines sibling studies. Lynn concludes that the tendency of children with a high number of siblings to be the least intelligent is evidence of dysgenic fertility. Lynn concedes that there has been a genuine increase in phenotypic intelligence (see Flynn effect), but argues that this is caused by environmental factors and is masking a decline in genotypic intelligence.

Lynn points to evidence that those with greater educational achievement have fewer children, while children with lower IQ come from larger families [37] as primary evidence that intelligence and fertility are negatively correlated. Continuing the theme of correlates of fertility, socioeconomic status appears to have a negative effect on fertility, which Lynn thinks is because there is increasingly ineffective use of contraception with declining socioeconomic class. Regarding intelligence, Lynn agrees with Lewis Terman’s comment in 1922 that “[t]he children of successful and cultivated parents test higher than children from wretched and ignorant homes for the simple reason that their heredity is better”.[citation needed]

Lynn goes on to present evidence that socioeconomic status is negatively correlated with indicators of conscientiousness such as work ethic, moral values and crime. Next the genetic basis of differences in conscientiousness is discussed, and Lynn concludes that twin studies provide evidence of a high heritability for the trait. The less conscientious, such as criminals, have more offspring.

While most of the book discusses evidence for dysgenics in developed countries, Lynn acknowledges that it is less strong in developing countries, but concludes that “dysgenic fertility [...] is a worldwide phenomenon of modern populations” (p. 196).

Lynn concludes with an examination of counter-arguments. These include that the traits discussed are not genetically determined, that intelligence and fertility can be inversely related without dysgenics, that socioeconomic classes do not differ genetically, and that there is no such thing as a ‘bad gene’. These arguments are dismissed, and Lynn asserts that these trends represent a serious problem. Finally, he expresses support for eugenics, which is the subject of his next book, Eugenics: A Reassessment.[38]

A review of Dysgenics by W.D. Hamilton, FRS, Royal Society Research Professor in evolutionary biology at the University of Oxford, was published posthumously in 2000.[39] In this lengthy review, written according to the author in "rambling essay format", Hamilton writes that Lynn, "discussing the large bank of evidence that still accumulates on heritability of aptitudes and differentials of fertility, shows in this book that almost all of the worries of the early eugenicists were well-founded, in spite of the relative paucity of their evidence at the time"; in the second half of the review, several directions not covered in Lynn's book are explored.

Another review of Dysgenics was written in 2002 by N.J. Mackintosh, FRS, Emeritus Professor of Experimental Psychology in the University of Cambridge.[40] Mackintosh writes that, "with a cavalier disregard for political correctness, he argues that the ideas of the eugenecists were correct and that we ignore them at our peril." While recognizing that the book provides a valuable and accurate source of information, he criticizes Lynn for "not fully acknowledg[ing] the negative relationship between social class and education on the one hand, and infant mortality and life expectancy on the other." He calls into question Lynn's interpretation of data. He also points out that according to Lynn's reading of the theory of natural selection, "if it is true that those with lower IQ and less education are producing more offspring, then they are fitter than those of higher IQ and more education"; he writes that, on the contrary, the eugenecists' arguments rest not as Lynn suggests on some "biological imperative, but rather on a particular set of value judgements."

In Eugenics: A Reassessment (2001),[38] Lynn argues that embryo selection as a form of standard reproductive therapy would raise the average intelligence of the population by 15 IQ points in a single generation (p. 300). If couples produce a hundred embryos, he argues, the range in potential IQ would be around 15 points above and below the parents' IQ. Lynn argues this gain could be repeated each generation, eventually stabilizing the population's IQ at a theoretical maximum of around 200 after as little as six or seven generations.

Eugenics received praise in the American Psychological Association Review of Books (Lykken 2004) as "[an] excellent, scholarly book ...one cannot reasonably disagree with him on any point unless one can find an argument he has not already refuted.", as well as by the journal Nature[41] as a "comprehensive histor[y]" and a welcome one, "given the importance of the topic" of dysgenic trends.

The Pioneer Fund

Lynn currently serves on the board of directors of the Pioneer Fund, and is also on the editorial board of the Pioneer-supported journal Mankind Quarterly, both of which have been the subject of controversy for their dealing with race and intelligence and eugenics, and have been accused of racism. Lynn's Ulster Institute for Social Research received $609,000 in grants from the Pioneer Fund between 1971 and 1996.[42]

Lynn's 2001 book The Science of Human Diversity: A History of the Pioneer Fund[43] is a history and defense of the fund, in which he argues that, for the last sixty years, it has been "nearly the only non-profit foundation making grants for study and research into individual and group differences and the hereditary basis of human nature ... Over those 60 years, the research funded by Pioneer has helped change the face of social science."

Criticism

Lynn's review work on global racial differences in cognitive ability has been cited for misrepresenting the research of other scientists, and has been criticized for unsystematic methodology and distortion.

Many of the data points in Lynn's book IQ and the Wealth of Nations were not based on residents of the named countries. The datum for Suriname was based on tests given to Surinamese who had emigrated to the Netherlands, and the datum for Ethiopia was based on the IQ scores of a highly selected group that had emigrated to Israel, and, for cultural and historical reasons, was hardly representative of the Ethiopian population. The datum for Mexico was based on a weighted averaging of the results of a study of “Native American and Mestizo children in Southern Mexico” with results of a study of residents of Argentina.[44]

The datum that Lynn and Vanhanen used for the lowest IQ estimate, Equatorial Guinea, was the mean IQ of a group of Spanish children in a home for the developmentally disabled in Spain.[45] Corrections were applied to adjust for differences in IQ cohorts (the “Flynn” effect) on the assumption that the same correction could be applied internationally, without regard to the cultural or economic development level of the country involved. While there appears to be rather little evidence on cohort effect upon IQ across the developing countries, one study in Kenya (Daley, Whaley, Sigman, Espinosa, & Neumann, 2003) shows a substantially larger cohort effect than is reported for developed countries (p.?)[44]

In a critical review of The Bell Curve, psychologist Leon Kamin faulted Lynn for disregarding scientific objectivity, misrepresenting data, and for racism.[46] Kamin argues that the studies of cognitive ability of Africans in Lynn's meta-analysis cited by Herrnstein and Murray show strong cultural bias. Kamin also reproached Lynn for concocting IQ values from test scores that have no correlation to IQ.[47] Kamin also notes that Lynn excluded a study that found no difference in White and Black performance, and ignored the results of a study which showed Black scores were higher than White scores.[48]

Journalist Charles Lane criticized Lynn's methodology in his New York Review of Books article "The Tainted Sources of 'The Bell Curve'" (1994),[49] to which then Pioneer Fund president Harry F. Weyher replied.[50]

Bibliography

Books

  • Richard Lynn and Tatu Vanhanen, IQ and the Wealth of Nations, 2002, Praeger/Greenwood
  • Richard Lynn (1996 and 2011). Dysgenics: Genetic Deterioration in Modern Populations. Praeger Publishers. ISBN 0275949176.
  • Richard Lynn (2001). Eugenics: A Reassessment. Praeger Publishers. ISBN 0275958221.
  • Richard Lynn and Tatu Vanhanen, IQ and Global Inequality, 2006

Notes

  1. ^ Psychology Research Institute
  2. ^ a b Richard Lynn
  3. ^ Call for re-think on eugenics BBCNews Friday, 26 April 2002
  4. ^ Donald I. Templer (2011). "Richard Lynn and the evolution of conscientiousness". Personality and Individual Differences.
  5. ^ Gottfredson, Linda (13 December 1994). Mainstream Science on Intelligence. p A18.
  6. ^ Intelligence[1] and Personality and Individual Differences[2] publisher's pages.
  7. ^ William H. Tucker, The funding of scientific racism: Wickliffe Draper and the Pioneer Fund, University of Illinois Press, 2002. Page 214
  8. ^ William H. Tucker, The funding of scientific racism: Wickliffe Draper and the Pioneer Fund, University of Illinois Press, 2002, pg. 2
  9. ^ "Publications". Rlynn.co.uk. Retrieved 2010-08-21.
  10. ^ Praeger; ISBN 027597510X
  11. ^ "Intelligence : Sorry, wrong numbers: An analysis of a study of a correlation between skin color and IQ". ScienceDirect. 2005-11-28. Retrieved 2010-08-21.
  12. ^ "ScienceDirect - Intelligence : Temperature, skin color, per capita income, and IQ: An international perspective". Dx.doi.org. doi:10.1016/j.intell.2005.04.002. {{cite web}}: |access-date= requires |url= (help); Missing or empty |url= (help)
  13. ^ "ScienceDirect TOP25 Hottest Articles". Top25.sciencedirect.com. Retrieved 2010-08-21.
  14. ^ Washington Summit Books; ISBN 1-59368-020-1
  15. ^ Herrnstein and Murray 1994; Lynn 1991a; Lynn 2006
  16. ^ Rushton, J. P. (2006). "Lynn Richard, Race Differences in Intelligence: An Evolutionary Analysis, Washington Summit Books, Augusta, GA (2005) ISBN 1-59368-020-1, 318 pages., US$34.95". Personality and Individual Differences. 40 (4): 853–855. doi:10.1016/j.paid.2005.10.004. {{cite journal}}: Cite has empty unknown parameter: |month= (help)
  17. ^ Lynn, R. and Vanhanen, T. (2002). IQ and the wealth of nations. Westport, CT: Praeger. ISBN 0-275-97510-X
  18. ^ In RDiI Lynn surveys NGO reports of four different signs of severe malnutrition - underweight, anemia, wasting, and stunting - for five developing regions, ranking Latin America as suffering the least malnutrition, followed by the Middle-east, Asia/Pacific, Africa, and finally South Asia, suffering the worst malnutrition of any region (ch. 14).
  19. ^ Lynn's data is somewhat weak on Ashkenazi Jews (Malloy 2006), and only allows an indirect, weighted estimate in Israel (103), compared with (similarly indirect) estimates of 91 for Israeli Oriental Jews, and 86 for Israeli Arabs. Israeli Ashkenazi's scores may average lower than U.S. and British Ashkenazi, Lynn suggests, due to selective migration effects in relation to those countries, and to immigrants from the former Soviet Block countries having posed as Ashkenazim. The data isn't necessarily strong enough, however, to rule out identical scores for Ashkenazi across these nations (Malloy 2006).
  20. ^ "ScienceDirect - Intelligence : National differences in intelligence and educational attainment". Dx.doi.org. doi:10.1016/j.intell.2006.06.001. {{cite web}}: |access-date= requires |url= (help); Missing or empty |url= (help)
  21. ^ Discussed in Lynn and Mikk 2006. See review by Rushton in Personality and Individual Differences (October 2006).[3]
  22. ^ Lynn, R. (2008). The Global Bell Curve: Race, IQ, and Inequality Worldwide. Augusta, GA: Washington Summit Publishers. pp. 378 pp. ISBN 1-59368-028-7.
  23. ^ Lynn, R. "Publications". Retrieved 2008-07-27.
  24. ^ Rushton, J. P. (2008). "The Global Bell Curve: Race, IQ and Inequality Worldwide (Book review)". Personality and Individual Differences. 45 (1): 113–114. doi:10.1016/j.paid.2008.03.008. Lynn shows in detail that similar racial IQ/socio-economic hierarchies are present within Africa, Australia, Brazil, Britain, Canada, the Caribbean, Latin America, the Netherlands, and New Zealand. {{cite journal}}: Unknown parameter |month= ignored (help)
  25. ^ Lynn, R. Backhoff, E. Contreras, L. "ETHNIC AND RACIAL DIFFERENCES ON THE STANDARD PROGRESSIVE MATRICES IN MEXICO". Retrieved Journal of Biosocial Science. 2005; 37: 107-113 (University of Cambridge, UK). {{cite web}}: Check date values in: |accessdate= (help)CS1 maint: multiple names: authors list (link)
  26. ^ Lynn, R. (2010). In Italy, north–south differences in IQ predict differences in income, education, infant mortality, stature, and literacy. Intelligence, 38 (1), 93-100
  27. ^ "The mean Southern Italian children IQ is not particularly low: A reply to R. Lynn (2010), Intelligence".
  28. ^ "Genetic Variation and Recent Positive Selection in Worldwide Human Populations: Evidence From Nearly 1 Million SNPs, PLoS ONE".
  29. ^ "Worldwide Human Relationships Inferred from Genome-Wide Patterns of Variation, Science".
  30. ^ [4][dead link]
  31. ^ [5][dead link]
  32. ^ Lynn, Richard, and Paul Irwing (2004). Sex differences on the progressive matrices: A meta-analysis. Intelligence 32 (2004) 481–498. Richard Lynn, University of Ulster, Coleraine, Northern Ireland, UK. Paul Irwing, Manchester School of Management, University of Manchester Institute of Science and Technology, P.O. Box 88, Manchester, M60 1QD, UK. http://www.uam.es/personal_pdi/psicologia/pei/download/Lynn2004.pdf
  33. ^ Irwing, P. and Lynn, R. (2005), Sex differences in means and variability on the progressive matrices in university students: A meta-analysis. British Journal of Psychology, 96: 505–524. doi: 10.1348/000712605X53542
  34. ^ Richard Lynn, Adrian Raine, Peter H. Venables, Sarnoff A. Mednick, Paul Irwing (2005). Sex differences on the WISC-R in Mauritius. Intelligence, Volume 33, Issue 5, September–October 2005, Pages 527-533 doi:10.1016/j.intell.2005.05.001
  35. ^ Guardian reporting Lynn & Irwing study and Blinkhorn's reply, 2005
  36. ^ Richard Lynn: Dysgenics: genetic deterioration in modern populations Westport, Conn. : Praeger, 1996., ISBN 978-0275949174
  37. ^ E. Ramsden. (2007). A differential paradox: The controversy surrounding the Scottish mental surveys of intelligence and family size. Journal of the History of the Behavioral Sciences, 43, 109-134
  38. ^ a b Richard Lynn: Eugenics: a reassessment Praeger, Westport, Conn c2001., ISBN 978-0275958220
  39. ^ Hamilton, W.D. (2000). "A review of Dysgenics: Genetic Deterioration in Modern Populations". Ann. Hum. Genet. 64 (4): 363–374. doi:10.1046/j.1469-1809.2000.6440363.x.
  40. ^ Mackintosh, N.J. (2002). "Dysgenics: Genetic Deterioration in Modern Populations. By Richard Lynn. Pp. 237. (Praeger, 1996.) £48.95, 0-275-94917-6, hardback". J. Biosoc. Sci. 34 (02): 283–284. doi:10.1017/S0021932002212833.
  41. ^ Martin 2001
  42. ^ "ISAR". Ferris.edu. Retrieved 2010-08-21.
  43. ^ Rowman & Littlefield; ISBN 0761820418
  44. ^ a b Hunt, E. & Wittmann, W. (2008). "National intelligence and national prosperity". Intelligence. Vol. 36, 1, January–February pp. 1-9.
  45. ^ Wicherts, J.M.; Dolan, Conor V.; van der Maas, Han L.J. (2009-06-07). "A systematic literature review of the average IQ of sub-Saharan Africans" (PDF). Intelligence. 38 (1). Elsevier: 10. doi:10.1016/j.intell.2009.05.002. Retrieved 2010-10-02.
  46. ^ Kamin, Leon (1995). "The Bell Curve: Intelligence and Class Structure in American Life". Scientific American. 272. Lynn's distortions and misrepresentations of the data constitute a truly venomous racism, combined with scandalous disregard for scientific objectivity. Lynn is widely known among academics to be an associate editor of the racist journal "Mankind Quarterly" and a major recipient of financial support from the nativist, eugenically oriented Pioneer Fund. {{cite journal}}: Unknown parameter |month= ignored (help)
  47. ^ Kamin, Leon (1995). "The Bell Curve: Intelligence and Class Structure in American Life". Scientific American. 272. In 1992 Owen reported on a sample of coloured students that had been added to the groups he had tested earlier. The footnote in "The Bell Curve" seems to credit this report as proving that South African colored students have an IQ "similar to that of American blacks," that is, about 85 (the actual reference does not appear in the book's bibliography). That statement does not correctly characterize Owen's work. The test used by Owen in 1992 was the "nonverbal" Raven's Progressive Matrices, which is thought to be less culturally biased than other IQ tests. He was able to compare the performance of colored students with that of the whites, blacks and Indians in his 1989 study because the earlier set of pupils had taken the Progressive Matrices in addition to the Junior Aptitude Tests. The black pupils, recall, had poor knowledge of English, but Owen felt that the instructions for the Matrices "are so easy that they can be explained with gestures." Owen's 1992 paper again does not assign IQs to the pupils. Rather he gives the mean number of correct responses on the Progressive Matrices (out of a possible 60) for each group: 45 for whites, 42 for Indians, 37 for coloreds and 28 for blacks. The test's developer, John Raven, repeatedly insisted that results on the Progressive Matrices tests cannot be converted into IQs. Matrices scores, unlike IQs, are not symmetrical around their mean (no "bell curve" here). There is thus no meaningful way to convert an average of raw Matrices scores into an IQ, and no comparison with American black IQs is possible. {{cite journal}}: Unknown parameter |month= ignored (help)
  48. ^ Kamin, Leon (1995). "The Bell Curve: Intelligence and Class Structure in American Life". Scientific American. 272. Archived from the original on 2007-10-22. Lynn chose to ignore the substance of Crawford-Nutt's paper, which reported that 228 black high school students in Soweto scored an average of 45 correct responses on the Matrices—HIGHER than the mean of 44 achieved by the same-age white sample on whom the test's norms had been established and well above the mean of Owen's coloured pupils. {{cite journal}}: Unknown parameter |month= ignored (help)
  49. ^ More by Charles Lane. "The Tainted Sources of 'The Bell Curve' | The New York Review of Books". Nybooks.com. Retrieved 2010-08-21.
  50. ^ More by Charles Lane, Harry F. Weyher. "'The Bell Curve' and Its Sources | The New York Review of Books". Nybooks.com. Retrieved 2010-08-21.

References

  • Cavalli-Sforza, L. L., Menozzi, P., & Piazza, A. (1994). The history and geography of human genes. Princeton, NJ: Princeton University Press.
  • Flynn, J. (1982). Bulletin of the British Psychological Society, 35, 411.
  • Flynn, J. (1984). The mean IQ of Americans: massive gains 1932 to 1978. Psychological Bulletin, 95, 29-51.
  • Flynn, J. (1987). Massive gains in 14 nations: what IQ tests really measure. Psychological Bulletin, 101, 171-91.
  • Lykken, D. (2004). The New Eugenics. Contemporary Psychology, 49, 670-672.
  • Lynn, Richard (1978). "Ethnic and Racial Differences in Intelligence, International Comparisons". Human variation: The biopsychology of age, race, and sex. Academic Press. ISBN 0-12-529050-0. {{cite book}}: Cite has empty unknown parameters: |month= and |coauthors= (help)
  • Lynn, Richard. (1982). IQ in Japan and the United States shows a growing disparity. Nature, 297, 222-3.
  • Lynn, Richard. (1990). The role of nutrition in secular increases of intelligence. Personality and Individual Differences, 11, 273-285.
  • Lynn, Richard (1996). Dysgenics: Genetic Deterioration in Modern Populations. Praeger Publishers. ISBN 0275949176. {{cite book}}: Cite has empty unknown parameters: |month= and |coauthors= (help)
  • Lynn, Richard (2001). Eugenics: A Reassessment. Praeger Publishers. ISBN 0275958221. {{cite book}}: Cite has empty unknown parameters: |month= and |coauthors= (help)
  • Lynn, Richard. (2010). In Italy, north–south differences in IQ predict differences in income, education, infant mortality, stature, and literacy. Intelligence, Volume 38, Issue 1, January–February 2010, Pages 93–100
  • Malloy, J. (2006). "A World of Difference: Richard Lynn Maps World Intelligence". Gene Expression. Retrieved 2006-02-22.
  • Martin, N. (2001). Retrieving the 'eu' from eugenics. Nature, 414, 583.
  • Neisser, U. (1997). Rising Scores on Intelligence Tests. American Scientist, Sept.-Oct

Further reading

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