Evidence map›Paper›PMID 26618539›Full record

ArticlePloS one2015

Equality in Educational Policy and the Heritability of Educational Attainment.

Lucía Colodro-Conde, Frühling Rijsdijk, María J Tornero-Gómez, Juan F Sánchez-Romera, Juan R Ordoñana

Abstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

13 citing papers in PubMed.

  1. The Interplay of Genes and Environment Across Multiple Studies (IGEMS) Consortium After Fifteen Years.Twin research and human genetics : the official journal of the International Society for Twin Studies · 2026
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  8. Too early to declare a general law of social mobility and heritability for education.Proceedings of the National Academy of Sciences of the United States of America · 2020
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Lucía Colodro-CondeMurcia Twin Registry, Department of Human Anatomy and Psychobiology, University of Murcia, & IMIB-Arrixaca, Murcia, Spain.
Frühling RijsdijkMRC Social Genetic & Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, United Kingdom.
María J Tornero-GómezMurcia Twin Registry, Department of Human Anatomy and Psychobiology, University of Murcia, & IMIB-Arrixaca, Murcia, Spain.
Juan F Sánchez-RomeraDepartment of Developmental and Educational Psychology, University of Murcia, Murcia, Spain.
Juan R OrdoñanaMurcia Twin Registry, Department of Human Anatomy and Psychobiology, University of Murcia, & IMIB-Arrixaca, Murcia, Spain.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Secular variation in the heritability of educational attainment are proposed to be due to the implementation of more egalitarian educational policies leading to increased equality in educational opportunities in the second part of the 20th century. The action of effect is hypothesized to be a decrease of shared environmental (e.g., family socioeconomic status or parents' education) influences on educational attainment, giving more room for genetic differences between individuals to impact on the variation of the trait. However, this hypothesis has not yet found consistent evidence. Support for this effect relies mainly on comparisons between countries adopting different educational systems or between different time periods within a country reflecting changes in general policy. Using a population-based sample of 1271 pairs of adult twins, we analyzed the effect of the introduction of a specific educational policy in Spain in 1970. The shared-environmental variance decreased, leading to an increase in heritability in the post-reform cohort (44 vs. 67%) for males. Unstandardized estimates of genetic variance were of a similar magnitude (.56 vs. .57) between cohorts, while shared environmental variance decreased from .56 to .04. Heritability remained in the same range for women (40 vs. 34%). Our results support the role of educational policy in affecting the relative weight of genetic and environmental factors on educational attainment, such that increasing equality in educational opportunities increases heritability estimates by reducing variation of non-genetic familial origin.

Indexed as

AgedEducational StatusFemaleHumansMaleMiddle AgedSocial ClassSocial EnvironmentSpainTwins

Identifiers

PMID26618539
PMCPMC4664401

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.