Papers by Jan te Nijenhuis
Comparative sociology, Dec 21, 2023
Mankind Quarterly, Sep 1, 2021
Intelligence, May 1, 2017
Corrigendum to "Spearman's hypothesis tested comparing Libyan secondary school children with vari... more Corrigendum to "Spearman's hypothesis tested comparing Libyan secondary school children with various other groups of secondary school children on the items of the Standard Progressive Matrices" [Intelligence, 50 (2015) 118-124]
Militaire Spectator, 2008
We reply to Giangrande and Turkheimer's (2021; hereafter, “G&T”) recent critique of our meta-... more We reply to Giangrande and Turkheimer's (2021; hereafter, “G&T”) recent critique of our meta-analysis on racial/ethnic differences in the heritability of intelligence (Pesta et al., 2020). G&T misrepresented our paper and much of the relevant scientific literature, providing inaccurate comments about nearly every conceptual and methodological charge they leveled. Moreover, given a recent expert survey on this topic, even their claim that our viewpoints are “fringe” is ill-conceived. We addressed G&T’s critiques point-by-point in three sections. The first rebutted conceptual issues G&T raised. The second section quashed their claims of methodological, statistical, and interpretative issues, and showed that G&T fundamentally misunderstand this statistical technique. Third, we ran new analyses based on G&T’s speculations; results failed to support them. Our new analyses lead us to reemphasize that substantial racial/ethnic differences in the heritability of intelligence are unlikel...
The One-Group Pretest-Posttest Design, where the same group of people is measured before and afte... more The One-Group Pretest-Posttest Design, where the same group of people is measured before and after some event, can be fraught with statistical problems and issues with causal inference. Still, these designs are common from political science to developmental neuropsychology to economics. In cases with cognitive data, it has long been known that a second test, with no treatment or an ineffective manipulation between testings, leads to increased scores at time 2 without an increase in the underlying latent ability. We investigate several analytic approaches involving both manifest and latent variable modeling to see which methods are able to accurately model manifest score changes with no latent change. Using data from 760 schoolchildren given an intelligence test twice, with no intervention between, we show using manifest test scores, either directly or through univariate latent change score analysis, falsely leads one to believe an underlying increase has occurred. Second-order laten...
Journal of Biosocial Science, 2001
Summary. Evidence from eleven samples indicates that the mean IQ of third world immigrants in the... more Summary. Evidence from eleven samples indicates that the mean IQ of third world immigrants in the Netherlands is lower than the Dutch mean by approximately one standard deviation for Surinamese and Antillians, and by approximately one and a half standard deviations for Turks and Moroccans. Since IQ tests provide the best prediction of success in school and organizations, it could be that the immigrants’ lower mean IQ is an important factor in their low status on the Dutch labour market. The IQs of second-generation immigrants are rising.
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Papers by Jan te Nijenhuis