Dragon Horse
SuperMentor
Joined: 07 Feb 2007
{Posts: 1770 }
Location: Lookin DC Metro, Feelin Geneva
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 Posted: Sat 14 Feb 2009 23:47 Post subject: Flynn Effect news |
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Frank mentioned the Flynn effect, in another thread...since this is often used in "racialized science", I thought and update would be valuable.
It appears, at least in two nations in the West, the Flynn Effect is reversing...and Flynn has revised his thesis on what the Flynn Effect is.
Studies people might want to check out:
| Quote: |
Requiem for nutrition as the cause of IQ gains Raven's gains in Britain 1938 to 2008
James R. FlynnCorresponding Author Contact Information, a, E-mail The Corresponding Author
aUniversity of Otago, Box 56, Dunedin, New Zealand
Received 10 January 2009;
accepted 11 January 2009.
Available online 2 February 2009.
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 to 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 to 13 and 14 to 15, small gains turn into small losses. This is confirmed by Piagetian data and poses the possibility that the cognitive demands of teenage subculture have been stagnant over perhaps the last 30 years.
Keywords: nutrition and IQ; recent IQ gains in Britain; intelligence; causes of IQ gains over time; Raven's Progressive Matrices
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http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B73DX-4VHGC2H-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=38cd26815b46a28497e2bb44cee426be
| Quote: | Secular declines in cognitive test scores: A reversal of the Flynn Effect
homas W. Teasdalea, Corresponding Author Contact Information, E-mail The Corresponding Author and David R. Owenb
aDepartment of Psychology, University of Copenhagen, Øster Farimagsgade 5, 1353 Copenhagen K, Denmark
bDepartment of Psychology, Brooklyn College, City University of New York, United States
Received 13 June 2006;
revised 30 January 2007;
accepted 30 January 2007.
Available online 2 March 2007.
Abstract
Scores on cognitive tests have been very widely reported to have increased through the decades of the last century, a generational phenomenon termed the ‘Flynn Effect’ since it was most comprehensively documented by James Flynn in the 1980's. There has, however, been very little evidence concerning any continuity of the effect specifically into the present century. We here report data from a population, namely young adult males in Denmark, showing that whereas there were modest increases between 1988 and 1998 in scores on a battery of four cognitive tests–these constituting a diminishing continuation of a trend documented back to the late 1950's–scores on all four tests declined between 1998 and 2003/2004. For two of the tests, levels fell to below those of 1988. Across all tests, the decrease in the 5/6 year period corresponds to approximately 1.5 IQ points, very close to the net gain between 1988 and 1998. The declines between 1998 and 2003/4 appeared amongst both men pursuing higher academic education and those not doing so.
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http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6W4M-4N5KY0G-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=222f2e8d914bfc69e75b1a4d847f62a7
| Quote: | A long-term rise and recent decline in intelligence test performance: The Flynn Effect in reverse
Thomas W. Teasdalea, Corresponding Author Contact Information, E-mail The Corresponding Author and David R. Owenb
aDepartment of Psychology, University of Copenhagen, Njalsgade 88, 2300 Copenhagen S, Denmark
bDepartment of Psychology, Brooklyn College, City University of New York, NY 11210, United States
Received 13 September 2004;
accepted 17 January 2005.
Available online 23 May 2005.
Abstract
In the 1980s reviewed evidence indicated that, through the preceding decades of the last century, population performance on intelligence tests had been rising substantially, typically about 3–5 IQ points per decade, in developed countries. The phenomenon, now termed the ‘Flynn Effect’, has been variously attributed to biological and/or to social and educational factors. Although there is some evidence to suggest a slowing of the effect through the 1990s, only little evidence, to our knowledge, has yet been presented to show an arrest or reversal of the trend. Substantially replicating a recent report from Norway, we here report intelligence test results from over 500,000 young Danish men, tested between 1959 and 2004, showing that performance peaked in the late 1990s, and has since declined moderately to pre-1991 levels. A contributing factor in this recent fall could be a simultaneous decline in proportions of students entering 3-year advanced-level school programs for 16–18 year olds.
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http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V9F-4G7DXTD-3&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=6acadfc7cc28ade33ef57dde59f2b301
You have to have a membership to see the studies in their entirety unfortunately... |
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