The generational intelligence gains are caused by decreasing variance in the lower half of the distribution: Supporting evidence for the nutrition hypothesis
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The reduced variability may be explained by improved nutrition primarily benefiting malnourished individuals and educational changes mainly improving the abilities of the least able.
“This reduced variability may, as suggested, both be explained by improved nutrition primarily benefiting malnourished individuals [32, 33] and educational changes mainly improving the abilities of the least able [34].”
From The secular trend of intelligence test scores: The Danish experience for young men born between 1940 and 2000 (2021) · cites this paper as [32]
Cites
Investigating Spearman's Hypothesis by Means of Multi-Group Confirmatory Factor Analysis
Dolan, C. V. (2000) · Multivariate Behavioral Research · doi:10.1207/s15327906mbr3501_2 · Cited by 99 · see citing works
Secular gains in fluid intelligence: Evidence from the culture-fair intelligence test
COLOM, R., & GARCÍA-LÓPEZ, O. (2003) · Journal of Biosocial Science · doi:10.1017/s0021932003000336 · Cited by 42 · see citing works
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Intelligence: New findings and theoretical developments
Nisbett, R. E., Aronson, J., Blair, C., Dickens, W., Flynn, J., Halpern, D. F., & Turkheimer, E. (2012) · American Psychologist · doi:10.1037/a0026699 · Cited by 968 · see citing works
One Century of Global IQ Gains: A Formal Meta-Analysis of the Flynn Effect (1909–2013)
Pietschnig, J., & Voracek, M. (2015) · Perspectives on Psychological Science · doi:10.1177/1745691615577701 · Cited by 316 · see citing works
Secular declines in cognitive test scores: A reversal of the Flynn Effect
Teasdale, T. W., & Owen, D. R. (2008) · Intelligence · doi:10.1016/j.intell.2007.01.007 · Cited by 185 · see citing works
The Flynn effect and population aging
Skirbekk, V., Stonawski, M., Bonsang, E., & Staudinger, U. M. (2013) · Intelligence · doi:10.1016/j.intell.2013.02.001 · Cited by 89 · see citing works
Dworak, E. M., Revelle, W., & Condon, D. M. (2023) · Intelligence · doi:10.1016/j.intell.2023.101734 · Cited by 35 · see citing works
Hegelund, E. R., Teasdale, T. W., Okholm, G. T., Osler, M., Sørensen, T. I. A., Christensen, K., & Mortensen, E. L. (2021) · PLOS ONE · doi:10.1371/journal.pone.0261117 · Cited by 12 · see citing works
- Authors
- COLOM, R., LLUISFONT, J., & ANDRESPUEYO, A.
- Affiliations
- Universidad Autónoma de Madrid (ES)
- Universitat de Barcelona (ES)
- Corresponding author
- COLOM, R
- ORCID
- COLOM, R
- Venue
- Intelligence
- Publisher
- Elsevier BV
- Published
- 2005-02
- Volume
- 33
- Issue
- 1
- Pages
- 83-91
- ISSN
- 0160-2896 (ISSN-L)
- OpenAlex
- W2002115762
- Cited by
- 106
- References
- 2
- Citations by year
- 2026: 1 · 2024: 4 · 2023: 3 · 2021: 3 · 2020: 6 · 2019: 2 · 2018: 3 · 2017: 4 · 2016: 4 · 2015: 8 · 2014: 4 · 2013: 9 · 2012: 9
- FWCI
- 6.58
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Intelligence (publishedVersion)
- Topics
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Cognitive Abilities and Testing
- Social Sciences › Sociology and Political Science › Intergenerational and Educational Inequality Studies
- Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Birth, Development, and Health
- Keywords
- intelligence distribution, IQ trends, socioeconomic deprivation, children
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Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
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