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39 - Secular Changes in Intelligence

The “Flynn Effect”

from Part VII - Intelligence and Its Role in Society

Published online by Cambridge University Press:  13 December 2019

Robert J. Sternberg
Affiliation:
Cornell University, New York
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Summary

Massive IQ gains over time showed that obsolete norms had inflated estimates of the effects of intervention, adoption, and aging; and misdiagnosis of whether individuals had met IQ cutting lines that affected everything from the administration of the death penalty to who should benefit from special education. There were also important studies cited in the literature as if they could be taken at face value – the adoption study by Skodak and Skeels, for example. In America, obsolete norms had turned the death penalty into a lottery: you survive if you took a current test and got sixty-eight; you die if you took an obsolete test and got seventy-five. Research on the causes of IQ gains showed that environmental factors had a potency hitherto unappreciated, illuminated the history of cognitive progress in the twentieth century and its social significance, and recast the debate about group differences in IQ.

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Publisher: Cambridge University Press
Print publication year: 2020

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References

Batterjee, A. A. (2011). Intelligence and education: The Saudi case. Mankind Quarterly 52, 133187.Google Scholar
Baxendale, S. (2010). The Flynn effect and memory function. Journal of Clinical and Experimental Neuropsychology, 32, 699703.Google Scholar
Blair, C., Gamson, D., Thorne, S., & Baker, D. (2005). Rising mean IQ: Cognitive demand of mathematics education for young children, population exposure to formal schooling, and the neurobiology of the prefrontal cortex. Intelligence, 33, 93106.Google Scholar
Brand, C. R. (1990). A “gross” underestimate of a “massive” IQ rise? A rejoinder to Flynn. The Irish Journal of Psychology, 11, 5256.Google Scholar
Brand, C. R., Freshwater, S., & Dockrell, W. B. (1989). Has there been a “massive” rise in IQ levels in the West? Evidence for Scottish children. The Irish Journal of Psychology, 11, 4151.Google Scholar
Bratsberg, R., & Rogeberg, O. (2018). Flynn effect and its reversal are both environmentally caused. Proceedings of the National Academy of Sciences, 115, 66746678.Google Scholar
Carey, J. (1992). The intellectuals and the masses: Pride and prejudice among the literary intelligentsia, 1880–1939. London: Faber.Google Scholar
Carpenter, P. A., Just, M. A., & Shell, P. (1990). What one intelligence test measures: A theoretical account of processing in the Raven progressive matrices test. Psychological Review, 97, 404431.CrossRefGoogle Scholar
Ceci, S. J. (1991). How much does schooling influence general intelligence and its cognitive components? A reassessment of the evidence. Developmental Psychology, 27, 703722.Google Scholar
Colom, R., & Flores-Mendoz, C. E. (2007). Intelligence predicts scholastic achievement irrespective of SES factors: Evidence from Brazil. Intelligence, 35, 243251.Google Scholar
Cotton, S., Kiely, P., Crewther, D., Thompson, B., Laycock, R., & Crewther, S. (2005). A normative and reliability study of the Raven’s Coloured Matrices for primary school aged children from Victoria, Australia. Personality and Individual Differences, 39, 647659.Google Scholar
Daley, T. C., Whaley, S. E., Sigman, M. D., Espinosa, M. P., & Neumann, C. (2003). IQ on the rise: The Flynn Effect in rural Kenyan children. Psychological Science, 14, 215219.Google Scholar
Dutton, E., Bakhiet, S. F. A., Osman, H. A., Becker, D., Essa, Y. A. S., Blahmar, T. A. M., Lynn, R., & Hakami, S. A. (2018). A Flynn effect in Khartoum, the Sudanese capital, 2004–2016. Intelligence, 68, 8286.CrossRefGoogle Scholar
Dutton, E., & Lynn, R. (2013). A negative Flynn effect in Finland, 1997–2009. Intelligence, 41, 817820.Google Scholar
Dutton, E., & Lynn, R. (2015). A negative Flynn effect in France, 1999 to 2008–9. Intelligence, 51, 6770.Google Scholar
Dutton, E., Van der Linden, D., & Lynn, R. (2016). The negative Flynn effect: A systematic literature review. Intelligence, 59, 163169.Google Scholar
Flynn, J. R. (1984). The mean IQ of Americans: Massive gains 1932 to 1978. Psychological Bulletin, 95, 2951.Google Scholar
Flynn, J. R. (1985). Wechsler intelligence tests: Do we really have a criterion of mental retardation? American Journal of Mental Deficiency, 90, 236244.Google Scholar
Flynn, J. R. (1987). Massive IQ gains in 14 nations: What IQ tests really measure. Psychological Bulletin, 101, 171191.Google Scholar
Flynn, J. R. (1990). Massive IQ gains on the Scottish WISC: Evidence against Brand et al.’s hypothesis. The Irish Journal of Psychology, 11, 4151.CrossRefGoogle Scholar
Flynn, J. R. (1993). Skodak and Skeels: The inflated mother-child IQ gap. Intelligence, 17, 557561.Google Scholar
Flynn, J. R. (1998). The schools: IQ tests, labels, and the word “intelligence.” In Carlson, J. S., Kingma, J., & Tomic, W. (Eds.), Advances in cognition and educational practice, Vol. 5, Conceptual issues in research on intelligence (pp. 1342). London: JAI Press.Google Scholar
Flynn, J. R. (2009a). The WAIS-III and WAIS-IV: Daubert motions favor the certainly false over the approximately true. Applied Neuropsychology, 16, 17.Google Scholar
Flynn, J. R. (2009b). What is intelligence? Beyond the Flynn effect. Cambridge: Cambridge University Press.Google Scholar
Flynn, J. R. (2012a). Are we getting smarter: Rising IQ in the twenty-first century. Cambridge: Cambridge University Press.Google Scholar
Flynn, J. R. (2012b). How to improve your mind: Twenty keys to unlock the modern world. London: Wiley-Blackwell.Google Scholar
Flynn, J. R. (2013). The “Flynn effect” and Flynn’s paradox. Intelligence, 41, 851857.CrossRefGoogle Scholar
Flynn, J. R. (2016a). Does your family make you smarter? Nature, nurture, and human autonomy. Cambridge: Cambridge University Press.Google Scholar
Flynn, J. R. (2016b). The new torchlight list: In search of the best modern authors. Wellington, New Zealand: AWA Press.Google Scholar
Flynn, J. R. (2017). No place to hide: Climate change – a short introduction for New Zealanders. Nelson, New Zealand: Potton & Burton.Google Scholar
Flynn, J. R., & Rossi-Casé, L. (2011). Modern women match men on Raven’s Progressive Matrices. Personality and Individual Differences, 50, 799803.Google Scholar
Flynn, J. R., & Shayer, M. (2017). IQ decline and Piaget: Does the rot start at the top? Intelligence 66, 112121.Google Scholar
Flynn, J. R., & Widaman, K. (2007). The Flynn effect and the shadow of the past: MR and the indefensible and indispensable role of IQ. International Review of Research in Mental Retardation, 35, 123151.Google Scholar
Florida, R. (2014). Where the good and bad jobs will be, 10 years from now. Vol. 25, City Lab.Google Scholar
Fox, M. C., & Mitchum, A. L. (2012). A knowledge based theory of rising scores on “culture-free” tests. Journal of Experimental Psychology: General, 142, 9791000.Google Scholar
Garber, H. L. (1988). The Milwaukee Project: Preventing mental retardation in children at risk. Washington, DC: American Association on Mental Retardation.Google Scholar
Genovese, J. E. (2002). Cognitive skills valued by educators: Historic content analysis of testing in Ohio. Journal of Educational Research, 96, 101114.Google Scholar
Greenfield, P. A. (1998). The cultural evolution of IQ. In Neisser, U. (Ed.), The rising curve: Long-term gains in IQ and related measures (pp. 81124). Washington, DC: American Psychological Association.CrossRefGoogle Scholar
Gresham, F. M., & Reschly, D. J. (2011). Standard of practice and Flynn effect testimony in death penalty cases. Intellectual and Developmental Disabilities, 49, 131140.CrossRefGoogle ScholarPubMed
Husén, T., & Tuijnman, A. (1991). The contribution of formal schooling to the increase in intellectual capital. Educational Researcher, 20, 1725.CrossRefGoogle Scholar
Jensen, A. R. (1998). The g Factor: The science of mental ability. Westport, CT: PraegerGoogle Scholar
Johnson, S. (2005). Everything bad is good for you: How today’s popular culture is actually making us smarter. New York: Riverhead Books.Google Scholar
Kagitcibasi, C., & Biricik, D. (2011). Generational gains on the Draw-a-Person IQ scores: A three-decade comparison from Turkey. Intelligence, 39, 351356.CrossRefGoogle Scholar
Kanaya, T., Scullin, M. H., & Ceci, S. J. (2003). The Flynn effect and U.S. policies: The impact of rising IQ scores on American society via mental retardation diagnoses. American Psychologist, 58, 778790.Google Scholar
Khaleefa, O., Sulman, A. & Lynn, R. (2009). An increase of intelligence in Sudan,1987–2007. Journal of Biosocial Science, 41, 279283.Google Scholar
Korgesaar, M. (2013). Flynni Efekti esinemine ee sti abiturientide seas Raveni Testi põhjal [Presence of Flynn Effect among Estonian school-leavers on Raven Matrices]. Tartu: University of Tartu, Institute of Psychology.Google Scholar
Kvarnöf, G. (2018). Interview with Martin Ingvar. Svenska Dagbladet, January 30.Google Scholar
Laird, C., & Whitaker, S. (2011). The use of IQ and descriptions of people with intellectual disabilities in the scientific literature. British Journal of Developmental Disabilities, 57, 175183.CrossRefGoogle Scholar
Luria, A. R. (1976). Cognitive development: Its cultural and social foundations. Cambridge, MA: Harvard University Press.Google Scholar
Lynn, R. (1982). IQ in Japan and the United States shows a growing disparity. Nature, 297, 222223.Google Scholar
Lynn, R. (1998). In support of nutrition theory. In Neisser, U. (Ed.), The rising curve: Long-term gains in IQ and related measures (pp. 2566). Washington, DC: American Psychological Association.Google Scholar
Lynn, R., & Vanhanen, T. (2006). IQ and global inequality. Augusta, GA: Washington Summit Publishers.Google Scholar
Mahdi, W. (2011). Oil is no gold mine for jobs in Saudi. The National, March 2.Google Scholar
Martorell, R. (1998). Nutrition and the worldwide rise in IQ scores. In Neisser, U. (Ed.), The rising curve: Long-term gains in IQ and related measures (pp. 183206). Washington, DC: American Psychological Association.Google Scholar
Meisenberg, G., Lawless, E., Lambert, E., & Newton, A. (2005). The Flynn effect in the Caribbean: Generational change of cognitive test performance in Dominica. Mankind Quarterly, 46, 2969.Google Scholar
Mingroni, M. A. (2007). Resolving the IQ paradox: Heterosis as a cause of the Flynn Effect and other trends. Psychological Review, 114, 806829.Google Scholar
Must, O., & Must, A. (2013). Changes in test-taking patterns over time. Intelligence, 41, 780790.Google Scholar
NEA (National Endowment for the Arts). (2016). Results from the Annual Arts Basic Survey, August 2016. National Endowment for the Arts.Google Scholar
Pietschnig, J., & Gittler, G. (2015). A reversal of the Flynn effect for spatial perception in German-speaking countries: Evidence from a cross-temporal IRT-based meta-analysis. PloS One, 5, e14406.Google Scholar
Pietsching, J., Tran, U.S., & Voracek, M. (2013). Item-response theory modeling of IQ gains (the Flynn effect) on crystallized intelligence: Rodgers’ hypothesis yes, Brand’s hypothesis perhaps. Intelligence, 41, 791801.Google Scholar
Pietschnig, J., Voracek, M., & Formann, A.K. (2010). Pervasiveness of the IQ rise: A cross-temporal meta-analysis (1977–2014). Intelligence, 53, 145153.Google Scholar
Raven, J., Raven, J. C., & Court, J. H. (1989). Manual for Raven’s Progressive Matrices and Vocabulary Scales (Research Supplement No. 4). London: H. K. Lewis.Google Scholar
Raven, J., Raven, J. C., & Court, J. H. (1993). Manual for Raven’s Progressive Matrices and Vocabulary Scales (Section 1). Oxford: Oxford Psychologists Press.Google Scholar
Rönnlunda, M., & Nilsson, L.-G. (2009). Flynn effects on sub-factors of episodic and semantic memory: Parallel gains over time and the same set of determining factors. Neuropsychologia, 47, 21742180.CrossRefGoogle Scholar
Rutter, J. M. (2000). Comments in discussion on James R. Flynn. In Bock, G. R., Goode, J. A., & Webb, K. (Eds.), The nature of intelligence (Novartis Foundation Symposium 233). Chichester: Wiley.Google ScholarPubMed
Schalock, R. L. (2012). User’s guide. Intellectual Disability: Definition, Classification, and Systems of Support (11th ed.). Washington, DC: AAIDD Books.Google Scholar
Schooler, C. (1998). Environmental complexity and the Flynn effect. In Neisser, U. (Ed.), The rising curve: Long-term gains in IQ and related measures (pp. 6779). Washington, DC: American Psychological Association.Google Scholar
Shiu, W., Beaujean, A. A., Must, O., te Nijenhuis, J., & Must, A. (2013). An item-level examination of the Flynn effect on the National Intelligence Test in Estonia. Intelligence, 41, 770779.Google Scholar
Skodak, M., & Skeels, H. M. (1949). A final follow-up study of 100 adopted children. Journal of Genetic Psychology, 75, 85125.Google ScholarPubMed
Staff, R. T., Hogan, M. J., & Whalley, L. J. (2014). Aging trajectories of fluid intelligence in late life: The influence of age, practice and childhood IQ on Raven’s Progressive Matrices. Intelligence, 47, 194201.Google Scholar
Statista (2018). Percentage of the U.S. population who have completed four years of college or more from 1940 to 2017, by gender. Statisca Portal.Google Scholar
Steen, R. G. (2009). Human intelligence and medical illness: Assessing the Flynn effect. New York: Springer.CrossRefGoogle Scholar
Storfer, M. D. (1990). Intelligence and giftedness: The contributions of heredity and early environment. San Francisco: Jossey-Bass.Google Scholar
Sundet, J. M., Barlaug, D. G., & Torjussen, T. M. (2004). The end of the Flynn effect? A study of secular trends in mean intelligence test scores of Norwegian conscripts during half a century. Intelligence, 32, 349362.Google Scholar
Teasdale, T. W, & Owen, D. R. (2008). Secular declines in cognitive test scores: A reversal of the Flynn Effect. Intelligence, 36, 121126.Google Scholar
te Nijenhuis, J., Cho, S. H., Murphy, R., & Lee, K H. (2012). The Flynn effect in Korea: Large gains. Personality and Individual Differences, 53, 147151.Google Scholar
Tuddenham, R. (1948). Soldier intelligence in World Wars I and II. American Psychologist, 89, 5456.CrossRefGoogle Scholar
Verguts, T., De, Boeck., & Maris, E. (1999). Generation speed in Raven’s Progressive Matrices Test. Intelligence, 27, 329345.Google Scholar
Weiss, L. G., Gregoire, J.,& Zhu, J. (2016). Flaws in Flynn effect research with the Wechsler Scales. Journal of Psychoeducational Assessment, 34, 411420.Google Scholar
Wicherts, J. W., Dolan, C. V., Oosterveld, P., van Baal, G. C. V., Boomsma, D. I., & Span, M. M. (2014). Are intelligence tests measurement invariant over time? Investigating the nature of the Flynn effect. Intelligence, 32, 509537.Google Scholar
Woodley, M. A. (2011). Heterosis doesn’t cause the Flynn effect: A critical examination of Mingroni (2007). Psychological Review, 118, 689693.Google Scholar
Woodley, M. A., & Meisenberg, G. (2013). In the Netherlands the anti-Flynn effect is a Jensen effect. Personality and Individual Differences, 54, 872876.Google Scholar
Woodley, M. A., te Nijenhuis, J., & Murphy, R. (2013). Were the Victorians cleverer than us? The decline in general intelligence estimated from a meta-analysis of the slowing of simple reaction time. Intelligence, 41, 843850.Google Scholar
Young, G. W. (2012). Understanding Flynn and honoring Atkins: The Flynn effect should apply in capital determinations of mental retardation or intellectual disability. Vanderbilt Law Review, March.Google Scholar
Zajonc, R. B., & Mullally, P. R. (1997). Birth order: Reconciling conflicting effects. American Psychologist, 52, 685699.Google Scholar

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