2009-03-01, English, Article, Journal or magazine article edition: Requiem for nutrition as the cause of IQ gains: Raven's gains in Britain 1938-2008. Flynn, James R.

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Bookmark: http://trove.nla.gov.au/version/204230370
Physical Description
  • Magazine/​Journal article
Published
  • Elsevier B.V., 2009 March
Language
  • English

Edition details

Title
  • Requiem for nutrition as the cause of IQ gains: Raven's gains in Britain 1938-2008.
Appears In
  • Economics and Human Biology, v.7, no.1, 2009 March, p.18(10) (ISSN: 1570-677X)
Author
  • Flynn, James R.
Published
  • Elsevier B.V., 2009 March
Physical Description
  • Magazine/​Journal article
Subjects
Target Audience
  • Academic
Summary
  • To link to full-text access for this article, visit this link: http:/​/​dx.doi.org/​10.1016/​j.ehb.2009.01.009 Byline: James R. Flynn Keywords: Nutrition and IQ; Recent IQ gains in Britain; Intelligence; Causes of IQ gains over time; Raven's Progressive Matrices Abstract: The hypothesis that enhanced nutrition is mainly responsible for massive IQ gains over time borrows plausibility from the height gains of the 20th century. However, evidence shows that the two trends are largely independent. A detailed analysis of IQ trends on the Raven's Progressive Matrices tests in Britain dramatizes the poverty of the nutrition hypothesis. A multiple factor hypothesis that operates on three levels is offered as an alternative instrument of causal explanation. The Raven's data show that over the 65 years from circa 1942 to the present, taking ages 5-15 together, British school children have gained 14 IQ points for a rate of 0.216 points per year. However, since 1979, gains have declined with age and between the ages of 12-13 and 14-15, small gains turn into small losses. This is confirmed by Piagetian data and poses the possibility that the cognitive demands of teen-age subculture have been stagnant over perhaps the last 30 years. Author Affiliation: University of Otago, Box 56, Dunedin, New Zealand Article History: Received 10 January 2009; Accepted 11 January 2009
Terms of Use
  • COPYRIGHT 2009 Elsevier B.V.
Language
  • English
Database
  • Gale Academic OneFile
Identifier
  • 350500329

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