Evidence map›Paper›PMID 32831433›Full record

ArticleIntelligence

The causal influence of brain size on human intelligence: Evidence from within-family phenotypic associations and GWAS modeling.

James J Lee, Matt McGue, William G Iacono, Andrew M Michael, Christopher F Chabris

Open access · greenAbstract read
In one paragraph

Article in Intelligence. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 2 pooled it
6.3field-weighted citation impact, top 3% of its field
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

28 citing papers in PubMed, 2 syntheses or guidelines pooled it, 71 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. When a bigger brain is better: The case of bee olfactory learning.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  9. Cognition and Cognitive Reserve.Integrative psychological & behavioral science · 2024
    Review
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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 at 3 institutions in 1 country.

James J LeeDepartment of Psychology, University of Minnesota Twin Cities, 75 East River Parkway, Minneapolis, MN 55455, USA.
Matt McGueDepartment of Psychology, University of Minnesota Twin Cities, 75 East River Parkway, Minneapolis, MN 55455, USA.
William G IaconoDepartment of Psychology, University of Minnesota Twin Cities, 75 East River Parkway, Minneapolis, MN 55455, USA.
Andrew M MichaelGeisinger Health System, 120 Hamm Drive Suite 2A, Lewisburg, PA 17837, USA.
Christopher F ChabrisGeisinger Health System, 120 Hamm Drive Suite 2A, Lewisburg, PA 17837, USA.
Geisinger Health System · USTwin Cities Orthopedics · USUniversity of Minnesota · US

Funding

TWIN STUDY OF FEMALE ALCOHOLISMS AND OTHER DISORDERSR01AA009367 · NIAAA · UNIVERSITY OF MINNESOTA TWIN CITIES · PI MCGUE, MATTHEW K. · 1992 to 2013
$9.0M
Twin Family Study of Vulnerability to Substance AbuseR37DA005147 · NIDA · UNIVERSITY OF MINNESOTA · PI IACONO, WILLIAM G. · 2009 to 2018
$6.4M
TWIN/FAMILY STUDY OF VULNERABILITY TO SUBSTANCE ABUSER01DA005147 · NIDA · UNIVERSITY OF MINNESOTA TWIN CITIES · PI IACONO, WILLIAM G · 1987 to 2007
$5.5M
Adolescent drinking and midlife outcomes: A prospective cotwin control studyR37AA009367 · NIAAA · UNIVERSITY OF MINNESOTA · PI MCGUE, MATTHEW K. · 2016 to 2024
$5.4M
NIAAA NIH HHS R01 AA009367NIAAA NIH HHS R37 AA009367NIDA NIH HHS R01 DA005147NIDA NIH HHS R37 DA005147
6 · The paper itself

Abstract

There exists a moderate correlation between MRI-measured brain size and the general factor of IQ performance (

Indexed as

Brain sizeCausal inferenceCognitive evolutionIntelligenceStatistical genetics

Identifiers

PMID32831433
PMCPMC7440690
OpenAlexW2944337623

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

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.