In the Netherlands the anti-Flynn effect is a Jensen effect
2013 (English)In: Personality and Individual Differences, ISSN 0191-8869, E-ISSN 1873-3549, Vol. 54, no 8, 871-876 p.Article in journal (Refereed) Published
In this study, 63 observations of secular IQ changes (both Flynn and anti-Flynn effects) are collected from three demographically diverse studies of the Dutch population for the period 1975-2005 (representing the 1950-1990 birth cohorts), along with data on g loadings and subtest reliabilities. The method of correlated vectors is used to explore the association between Flynn and anti-Flynn effect magnitudes, both independently and together, and the g loadings of subtests. Despite a positive vector correlation the Flynn effects are not associated with the Jensen effect (r=.307, ns, N=36), however the anti-Flynn effects are (r=.406, P=.05, N=27). Combined, the vector correlation becomes negative but non-significant (r=-.111, ns, N=63). Declines due to the anti-Flynn effect are estimated at -4.515 points per decade, whereas gains due to the Flynn effect are estimated at 2.175 points per decade. The N-weighted net of these is a loss of -1.350 points per decade, suggesting an overall tendency towards decreasing IQ in the Netherlands with respect to these cohorts. The Jensen effect on the anti-Flynn effect suggests that it may be related to bio-demographic changes within the Netherlands which have reduced 'genetic-g', despite the presence of large, parallel gains on subtests that may be relatively more sensitive to cultural-environmental improvements. (C) 2013 Elsevier Ltd. All rights reserved.
Place, publisher, year, edition, pages
2013. Vol. 54, no 8, 871-876 p.
Anti-Flynn effect, Dysgenics, Flynn effect, Jensen effect, Co-occurrence model
IdentifiersURN: urn:nbn:se:umu:diva-71066DOI: 10.1016/j.paid.2012.12.022ISI: 000317169700001OAI: oai:DiVA.org:umu-71066DiVA: diva2:630104