14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differences to non-shared genes + the environment and developmental noise. https://t.co/NmApJwMDVz https://t.co/xjLYZ5kKhg
Meta-analysis of the heritability of human traits based on fifty years of twin studies.
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May 2017 – Oct 2025Where it's discussed
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What people are saying
Numerous discussions reference specific statistics from the publication, such as the average heritability of traits being around 50%. Phrases like 'average trait has heritability of 0.5' and mentions of '14 million twin pairs confirm' showcase the depth of information shared. The choice of words, such as 'it's known' or 'you just inherit this package,' sets a tone of certainty and encourages readers to reconsider previously held beliefs about nature versus nurture.
Most discussions reflect a supportive view of the article's conclusions on heritability.
Participants in the discussions express strong curiosity and relevance regarding genetic influences on traits.
Many comments reference specific figures and implications from the article, indicating moderate engagement with the content.
Several participants emphasize that the findings will significantly influence future research in genetics.
Abstract in brief
- A comprehensive metaanalysis of twin studies over fifty years investigates the heritability of 17,804 human traits, involving 14,558,903 twin pairs.
- Results show that the average heritability across traits is approximately 49%, with a majority (69%) aligning with a model emphasizing additive genetic variation.
- The findings challenge the notion of significant shared environmental or nonadditive genetic influences and aim to inform future gene-mapping research.
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Most liked on X and BlueskyNa metanálise gigantesca de Polderman et al. (2015), envolvendo +de 17 mil características e +de 2700 artigos, a variação entre pessoas foi explicada em ~50% pelos genes, ~20% pelo ambiente compartilhado. Os outros 30% são ambiente não-compartilhado. https://t.co/onxLiMaOWP
In the publication bias tests in the polderman meta-analysis, for higher-level cognitive ability, heritability and shared environment are biased significantly downwards by publication bias. https://t.co/TkuagMLrzw https://t.co/AOBodgCvBS (rMZ actually more biased in the point https://t.co/Xcg7WruEI1
@dissproportion 50% heritable, 50% etc https://t.co/0ZlqFCwHY4 Nabokov: "Three forces make and mold a human being: heredity, environment, and the unknown agent X. Of these the second, environment, is by far the least important, while the last, agent X, is by far the most influential."
E aqui está um estudo com todas as características humanas comportamentais estudadas até então, durante 50 anos com gêmeos, mostrando que a herdabilidade média é ~50%. Nós temos alelos associados a altíssimo QI também, se eu te mandar você desmaia? https://t.co/1LQCBOXo19 https://t.co/058a5RgIVt
Meta-analysis of the heritability of human traits based on 50 years of twin studies | Nature Genetics. Not kidding, more than 40 million pairs of twins, from 39 different countries, by @DPosthu https://t.co/vZiq1rZvuh
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Understanding Human Trait Heritability Through Twin Studies
This video explores a comprehensive meta-analysis of twin studies investigating the heritability of 17,804 human traits. With data from 14.5 million twin pairs, the findings reveal that the average heritability is about…
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@platosfugis @F1constante @bellini_mello artigos sobre o tema, https://t.co/wzBOBi5vFL https://t.co/dSFec6XsEi https://t.co/UYveDX1rgV
@ThePleasureProf @FredHFreak Funny how people invent these galaxy-brained hypothetical environmental parent-child trait transmission mechanisms when it is known that avg trait has heritability of 0.5: https://t.co/0vV3yFM423 No, you just inherit this package.
@pamelasm @Acabrockyy @KillerAceUSAF @agraybee @AlphEatsCats https://t.co/lGQULtTVWB https://t.co/h3lvruNt4n https://t.co/3VJVARc8aE You dont have to believe me, just read these. All of these say that its 0.75 or higher so i guess the first guy was right and i was lowballing it my bad g.
@grok @Bigfoot_AT @Mjz880 @FrenchUSLady @RadioRomaX @refractaire1er @NicolasQuiPaie 1. Le racisme anti-asiatique est l’œuvre des arabes ethniques principalement en France. 47% du tempérament est génétique (source : Meta-analysis of the heritability of human traits based on fifty years of twin studies) 2. C’est un dogme si on ne peut jamais le remettre en cause
@grok @Bigfoot_AT @Mjz880 @FrenchUSLady @RadioRomaX @refractaire1er @NicolasQuiPaie Meta-analysis of the heritability of human traits based on fifty years of twin studies : https://t.co/MxHq7TeC9G Temperament est à 47% génétique. Dire qu’il y a 0 génétique en cause est comme dire qu’il n’y a 0 causes sociales ou économiques. Malhonnête. https://t.co/INPke8JZ91
@Margueritestern Meta-analysis of the heritability of human traits based on fifty years of twin studies, Nature Genetics (2015) : https://t.co/2IskIdJT8G
@LoicVignon66783 @von_reinha23551 @JeReinforme Et surtout, vous semblez penser qu'il n'y a qu'une étude de jumeau sur le sujet. Il y a carrément une meta-analyse d'études de jumeaux qui inclut les performances intellectuelles. 2/n https://t.co/EP9FPNP2KD
@WOM110 @onerismske @UBERSOY1 https://t.co/vScKFQgWKB https://t.co/y4sDqM9n44 https://t.co/QnBEOjvVPc https://t.co/64epyneNfq https://t.co/QSzR5sdpSr https://t.co/daX38kve5u https://t.co/fKFVRvIyW4 https://t.co/KhxOvqt4kb Here's a TON of sources. Put it altogether now. 'Consensus' isnt what you claim.
RT @GaryANorman: In the publication bias tests in the polderman meta-analysis, for higher-level cognitive ability, heritability and shared…
RT @GaryANorman: In the publication bias tests in the polderman meta-analysis, for higher-level cognitive ability, heritability and shared…
RT @GaryANorman: In the publication bias tests in the polderman meta-analysis, for higher-level cognitive ability, heritability and shared…
RT @GaryANorman: In the publication bias tests in the polderman meta-analysis, for higher-level cognitive ability, heritability and shared…
In the publication bias tests in the polderman meta-analysis, for higher-level cognitive ability, heritability and shared environment are biased significantly downwards by publication bias. https://t.co/TkuagMLrzw https://t.co/AOBodgCvBS (rMZ actually more biased in the point https://t.co/Xcg7WruEI1
https://t.co/wfa2DKc7BH
@TexasJack119842 @KarlosMarx9 @Chudd_Li @Noah53325370931 @DrLeoMarvin5 https://t.co/V0Q2B8Zeb4 https://t.co/BYVFb1qk9d https://t.co/C0v6WAb0l0 https://t.co/JA5ITdq80Q https://t.co/3ZbZAR7ECY https://t.co/TIW3GvWofY
@marshofsleep @VinceRugari Intelligence is a heritable trait though? There are peer reviewed studies indicates heritability of intelligence is 50-70%. Here a few; https://t.co/o7kQ3SNpAY https://t.co/vtAH5myqFp https://t.co/PxewisgBg8
@wpenjoyer @motaakkkk @Red_Man012 @TheMarkS13th @coedeblois https://t.co/4GLfmdMVOP https://t.co/0irEbZZJ51 https://t.co/1oZT5woeeK
Meta-analysis of the heritability of human traits based on fifty years of twin studies | Nature Genetics https://t.co/t8adtkP7Iq
@PaulineEnamarre @JeReinforme @aucunnomdelibre @AntoineGoya Méta-analyse sur l'étude des jumeaux : https://t.co/BdUjBFOiO8 Les résultats vont plutôt dans le sens de l'article.
@SpaceKwest @mboudry Nee, aangenomen kinderen hebben het IQ van hun biologische ouders, niet van waar hun wieg terecht kwam. Onderzoek met geadopteerde tweelingen heeft dit ondubbelzinnig aangetoond. https://t.co/59Th59gqOn https://t.co/HIeY7bp2jm
RT @lorenlugosch: @dissproportion 50% heritable, 50% etc https://t.co/0ZlqFCwHY4 Nabokov: "Three forces make and mold a human being: hered…
RT @lorenlugosch: @dissproportion 50% heritable, 50% etc https://t.co/0ZlqFCwHY4 Nabokov: "Three forces make and mold a human being: hered…
@dissproportion 50% heritable, 50% etc https://t.co/0ZlqFCwHY4 Nabokov: "Three forces make and mold a human being: heredity, environment, and the unknown agent X. Of these the second, environment, is by far the least important, while the last, agent X, is by far the most influential."
@BostonTea84 Czytałeś to? https://t.co/9Q1KTKQC9O
@DPosthu Oh wait, I actually DID see it! Your paper "Meta-analysis of the heritability of human traits based on fifty years of twin studies" is my first source in the article version of my post: https://t.co/h8IU8UmK4h I also used 15 other sources but your article was certainly one of
@sucuscerasorum @skummaigenom @4lexTheGrape inom beteendegenetiken, vilken visar på en ärftlighet om 49%. Varje enskild gen påverkar föga, men tillsammans blir de starka (additiv genetisk variation). Beteendegenetikens fjärde lag. > https://t.co/5FzsKLp5kW
@bolivershagna2 @PeriklesGREAT https://t.co/RaFoixwGiv I didn't make it up. But it's been a few years. Details get foggy.
@evo_homo @alamjay78 @sebjenseb @JayMan471 @Weary_Rightist okay so I found the source because i thought this was a weird way to make the claim, the .93 number is a tad high! .82 is a perfectly acceptable number from twin studies! source is: https://t.co/wxJRkFdx4R https://t.co/VzCSwj05HS
@QRabullione @FromKulak You can start with Nature's meta-analysis of 50 years of twin studies. https://t.co/GAb2leKmpr
@0K_ultra @foomagemindset Cope CLT and strong polygenic nature of high-level traits nearly guarantees linear additivity https://t.co/OYPNjTL1Hx
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
@spacechimplife @willdepue Thanks for asking. I believe (1) refers to (2): (1) Murray, C. (2020). Human diversity: The biology of gender, race, and class. Twelve. (2) Polderman et al (2015). Meta-analysis of the heritability of human traits based on fifty years of twin studies. Nature genetics, 47(7).
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
RT @SteveStuWill: 14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differ…
14 million twin pairs confirm: All traits are partially heritable; twin similarity is due largely to shared genes, differences to non-shared genes + the environment and developmental noise. https://t.co/NmApJwMDVz https://t.co/xjLYZ5kKhg
Meta-analysis of the heritability of human traits based on fifty years of twin studies https://t.co/0KUOCK7tiP
@GaryNMarks @SashaGusevPosts When you say kin estimates do you mean this study? https://t.co/YEUIQrnz0F For the last point you made, RDR estimates for height even after accounting for AM is 0.699 https://t.co/5sOgTKmp6q For twins its 0.9 https://t.co/l5mVaDxbUI
@NoahHeslop2 @DelusionPosting You're right about severe abuse and neglect, but only a very small number of parents are guilty of that, so it only explains a small portion of the variance in traits. Twin studies show the substantial effect of genes—eg., Polderman et al. (2015). https://t.co/SxOhhfFQLR
@krichard1212 @datepsych @kareem_carr Correlation of high level cognitive function, age18-64: rMZ 0.68, rDZ 0.28 https://t.co/AfrAKuAlga
@jayjoseph22 Meanwhile… https://t.co/e9KZK23Tdu
@yourragegirl @lucifersammm https://t.co/5ojrTkn3Oa
RT @MPAlonso: Meta-analysis of the heritability of human traits based on fifty years of twin studies | Nature Genetics https://t.co/Mfqp8Oc…
RT @RamosCejudo: Meta-analysis of the heritability of human traits based on 50 years of twin studies | Nature Genetics. Not kidding, more t…
RT @RamosCejudo: Meta-analysis of the heritability of human traits based on 50 years of twin studies | Nature Genetics. Not kidding, more t…
RT @RamosCejudo: Meta-analysis of the heritability of human traits based on 50 years of twin studies | Nature Genetics. Not kidding, more t…
Meta-analysis of the heritability of human traits based on 50 years of twin studies | Nature Genetics. Not kidding, more than 40 million pairs of twins, from 39 different countries, by @DPosthu https://t.co/vZiq1rZvuh
RT @MPAlonso: Meta-analysis of the heritability of human traits based on fifty years of twin studies | Nature Genetics https://t.co/Mfqp8Oc…
RT @MPAlonso: Meta-analysis of the heritability of human traits based on fifty years of twin studies | Nature Genetics https://t.co/Mfqp8Oc…
Meta-analysis of the heritability of human traits based on fifty years of twin studies | Nature Genetics https://t.co/Mfqp8OcdN4
Meta-analysis of the heritability of human traits based on years of twin studies https://t.co/LC3RmFtM3j (https://t.co/s7fGKzk5ZV)
Meta-analysis of the heritability of human traits based on fifty years of twin studies https://t.co/hxwGe1iJzj
@splee_hk @SujeevanDiplo This is one of the big meta studies of twins, doesn’t look specifically at educational outcomes but across thousands of different traits the median variance is 69%. https://t.co/dXapDNBmIM
Na metanálise gigantesca de Polderman et al. (2015), envolvendo +de 17 mil características e +de 2700 artigos, a variação entre pessoas foi explicada em ~50% pelos genes, ~20% pelo ambiente compartilhado. Os outros 30% são ambiente não-compartilhado. https://t.co/onxLiMaOWP
@MaskedDefender Like I said, you don’t know what you’re talking about https://t.co/Hzl18SF5FQ
"Meta-Analysis of the Heritability of Human Traits Based on Fifty Years of Twin Studies,"https://t.co/YtYooaLwrY. Over 2,000 scientific papers on over 17,000 traits measured in over 2 million twin pairs. https://t.co/T4LiaG9URX
(PDF) Meta-analysis of the heritability of human traits based on fifty years of twin studies https://t.co/P2unMzWwPC
@Shanice79540635 家庭環境の影響は僅かです。生き別れの一卵性双生児の50歳時点の学歴や身長を見ると家庭環境に関わらず相関することが分かってます。つまり学歴−身長の相関は優良遺伝子の独占の結果だと考えられます(低学歴低身長の親は宝くじを当てても子供の学歴身長を改善できない) https://t.co/PJux1vLWe5
Erfelijkheid is hoger wanneer omgevingsinvloeden kleiner zijn, en omgekeerd (bv lagere ergelijkheid lichaamslengte in armere landen) Meta-analysis of the heritability of human traits based on fifty years of twin studies (Polderman, 2015) https://t.co/vl8E4O2Ste #dvhg21
Manakata refers to a 2015 meta-analysis of studies following over 14 million twin pairs in 39 countries: https://t.co/gpIihCqehn By comparing and measuring all the studies’ outcomes, the researchers concluded that genes influence who children become more than the environment. +
@bintalshamsa @rasmansa I take no joy from any of this. I just saw someone just call someone else names without justification and asked why. This paper is from NIH, please read. https://t.co/XozOR9aobk
@Race_Game_Movie @wil_da_beast630 This is because Wilfred knows next to nothing about behavioral genetics: https://t.co/Ka9Wg5nCrN That is, c^2 estimates of shared (including family) environments are generally low and often hit 0 by adulthood. Parent effects are strongly confounded with strong genetic effects.
RT @EliVieiraJr: E aqui está um estudo com todas as características humanas comportamentais estudadas até então, durante 50 anos com gêmeos…
E aqui está um estudo com todas as características humanas comportamentais estudadas até então, durante 50 anos com gêmeos, mostrando que a herdabilidade média é ~50%. Nós temos alelos associados a altíssimo QI também, se eu te mandar você desmaia? https://t.co/1LQCBOXo19 https://t.co/058a5RgIVt
@Sfpsfmd @Publicola17 @thomaschattwill https://t.co/eGjxBJd4iT
@katiecorker @ME_McCullough @BrentWRoberts Not that I know - but like (virtually all) other traits, the heritability of facets lies somewhere between .40 and .50 https://t.co/CqZ3kA8biv
"It is clear from multiple lines of evidence that all behavioural traits are influenced by genes; they are heritable." Leeuw CA, Sullivan PF, Bochoven A, Visscher PM, Posthuma D (July 2015). "Meta-analysis of the heritability of human traits based on fifty years of twin studies"
RT @benisoitlefruit: Meta-analysis of the heritability of human traits based on fifty years of twin studies | Nature Genetics https://t.co/…
Meta-analysis of the heritability of human traits based on fifty years of twin studies | Nature Genetics https://t.co/Ll39ylMpd0
STUDY ALERT: Meta-analysis of the heritability of human traits based on fifty years of twin studies: http://scottbarrykaufman.com/study-alert-meta-analysis-heritability-human-traits-based-fifty-years-twin-studies/ via @sbkaufman