SCORE, a collaboration of 865 researchers, is now released as three papers in Nature, six preprints, and a lot of data (cos.io/score/). SCORE examined repeatability of findings from the social-behavioral sciences and tested whether human and automated methods could predict replicability.

Check out this French popular science article on partner similarity and assortative mating, featuring yours truly:

Always energising to engage with cutting-edge work on assortative mating, cross-ancestry prediction, and rare variants at @ESSGN — especially with such a strong cohort of doctoral researchers at Vrije Universiteit Amsterdam. #Sociogenomics #GeneticPrediction #ESSGN

Me & @aysuo.bsky.social are hiring a postdoc to study gene–environment interplay in health & social inequalities 🧬 You'll analyze genomic data as part of a collaboration with Uppsala & Oslo at @amsterdamumc.bsky.social (NL) werkenbij.amsterdamumc.org/en/vacatures... Please RT for karma points ♥️

Engaging and clear podcast from @hfsunde.bsky.social on what is assortative mating and why it matters 🎧

Me and @aysuo.bsky.social went to Oslo a couple of weeks ago. This conversation with @hfsunde.bsky.social was really, really exciting!

I was on a podcast! I had great fun talking about my favorite social science genetics topic (partner similarity!) with @aysuo.bsky.social and @rafaelahlskog.bsky.social. If you want to learn more about assortative mating and why it is so interesting, give it a listen 🎧!

If you're looking to build or deepen your knowledge in statistical genetics, the ISG Workshop (June 1–11) covers the full range: biometrics, GWAS, polygenic scores, causal inference, and more. Open to all levels, virtual, and international: www.colorado.edu/ibg/workshop... Retweets appreciated 🙏

There seem to be a whole (older) cohort of eminent social psychologists who essentially do not understand the concept of sampling error, and I wonder to what extent that lack of understanding was an adaptive trait for a career.

Follow up on the genetics of chills from art and poetry. This time, including chills from music too 🧵 ⬇️

Article alert!🚨 1/11 Parents matter - and we can quantify part of that influence genetically. Our new JCPP paper on multivariate indirect maternal genetic effects across internalizing and externalizing symptoms. doi.org/10.1111/jcpp... #jcpp @uio.no @unioslo-svfak.bsky.social @unioslo-uv.bsky.social

This very interesting project has finally been published. Congratulations! They find stronger genetic associations with place of residence than place of birth for many traits, showing that population stratification also involves active rGE. Read @iakuznetsov.bsky.social's thread here:

I drafted a letter to the editor, please help me out by DMing, commenting, emailing feedback if you are an expert on colliderbias, id obviosuly ad you as a author, Ideally we submit within 24-48 hrs, draft: zenodo.org/records/1800... (click download if the pdf doesnt preview on zenodo)

Welcome to my 2025 scientific publications wrapped! It's been a good year for behavioral genetics, with exciting studies on the relationship between our DNA and socio-economic outcomes, sexual behavior, personality, intelligence, and psychiatric disorders 🧬 See thread below 👇🏽

Since journal editors are still too lenient on excessive use of abbreviations, I found another use case for large language models:

Or as I often say: Friends don't let friends use abbreviations!

We have a new paper out on personality and mate preferences. Check it out:

1/11 New @biorxivpreprint.bsky.social led by @ESSGNetwork PhD student @qiyuanpeng.bsky.social : Parental influence on children’s educational achievement using Trio-GCTA. doi.org/10.64898/202...

Who wants to join us in Oslo to study how health influences educational underperformance? We are hiring PhDs postdocs candidates for our funded project. We will follow children from birth to emerging adulthood, using behavioural genetic methods and large datasets 945000.webcruiter.no/Main/Recruit...

Its notable that some (in this case @mendelrandom.bsky.social (George Davey-Smith)) were on to him while he was alive, video a young GDS confronting Eysenk in a Q&A in 1994 for his data being inconsistent: youtu.be/K9pyS7EGCV8?...

Det er det samme i Norge. Finansieringsmodellen belønner studentens progresjon (studiepoeng, grader) og straffer de som stryker studenter. Studentenes rettsikkerhet er svært sterk, og innbyr til klaging m.v. Universitetene bør befris fra dette, og gjøres mer uavhengige!

If a lecturer wheels in an overhead projector with transparent sheets and markers, you’re about to witness either the best or worst lecture of your life. Nothing in between.

New preprint📈📉 What happens to health and work when people become grandparents? Using Norwegian register data on all individuals born 1950-1960, we use event-study models comparing grandparents to not-yet grandparents to track changes in health and labour supply. 🔗 www.ssrn.com/abstract=571...

Cross-country analyses of EA PGI associations are a crucial step towards an increased understanding of how genetic influences occur in conjunction with societal structures - but also of the inevitable challenges that come with doing so. See this new study out in Molecular Psychiatry! ⬇️

Getting grandchildren increases risk of respiratory infections, but also *reduces* risk of cardiovascular, musculoskeletal, and psychiatric conditions. It also causes a (probably voluntary) reduction in employment and income, an effect that is larger for women (i.e., a gendered "grandchild penalty")

👀

We wrote the Strain on scientific publishing to highlight the problems of time & trust. With a fantastic group of co-authors, we present The Drain of Scientific Publishing: a 🧵 1/n Drain: arxiv.org/abs/2511.04820 Strain: direct.mit.edu/qss/article/... Oligopoly: direct.mit.edu/qss/article/...

Ouch

1/ 🚨New paper in Nature Genetics Genetic factors are associated with the educational fields people study, from arts to engineering. Article: www.nature.com/articles/s41... FAQ: www.thehastingscenter.org/genomic-find...

Better schools can compensate for dispositions

Excited to share this work led by @cktamnes.bsky.social (and featuring many colleagues from PROMENTA at @unioslo-svfak.bsky.social) exploring the links between psychological wellbeing and illbeing across biological, developmental, societal and intervention perspectives

Very cool!

New blog post! Let's say you have two measures meant to capture the same confounder. They're highly correlated. Can you still proceed with your regression analysis? (I admit, the title is a bit of a spoiler) www.the100.ci/2025/10/13/i...

Two birds of a gene - catch Matt Keller's webinar at @uio.no on October 15th. Please share www.sv.uio.no/promenta/eng... @ispg.bsky.social @behaviorgenetic.bsky.social @unioslo-svfak.bsky.social @essgn.bsky.social @ibg.colorado.edu

It’s not the method that makes you causal it’s the assumptions

PsyPost did a piece on our recent study on assortative mating. Check out the full paper here: www.nature.com/articles/s41...

Our fragmentation paper is now finally out! I put some of the dumb quips that didn't make the cut in the alt texts. journals.sagepub.com/doi/10.1177/...

🚨 New preprint out! We reconstructed parental haplotypes in >440k individuals (UK & Estonian biobanks) to estimate assortative mating directly in the parental generation. This reveals intensified assortment in recent generations. www.biorxiv.org/content/10.1...

The largest study on late life virginity, based on >400k individuals, out now in @pnas.org Open access link: pnas.org/doi/10.1073/... Shoutout to shared first author @laurawesseldijk.bsky.social ❤️ Thread below 👇🏽

I tried making a figure explaining how the sum of variances law can be understood as the diagonal of a bivariate normal, and how a correlation between the two antecedent variables — such as under assortative mating — will result in greater variance and more cases above a threshold.

First, it is important to note that “assortative mating” is not synonymous with “partner similarity”. Instead, assortment is only one of several processes that can lead to partner similarity, the others being convergence, stratification, and inbreeding.

We have a new paper out, led by the great @hfsunde.bsky.social! We find that the correlation between parental income and offspring mental disorders may be partly causal in adolescence (phenotypic transmission), but that it is largely explained by passive genetic transmission in adulthood.

Accompanying the paper is an interactive web page with figures and tables showing the prevalence of psychological codes in the ICPC-2 by age, sex, and parental income quartile. Check it out here: hfsu.shinyapps.io/prevalence_b...

Our new paper is out today! 🎉 In it, we use administrative register data to document how psychiatric disorders are strongly linked to parental income, from childhood far into adulthood. Furthermore, we attempt to separate causation and selection using kinship-based models. doi.org/10.1111/jcpp...

🚨📜 Debut publication alert! Do genetics influence education differently across state borders? 🧬📚 We tested differences in genetic associations with education in East and West 🇩🇪 around reunification! Out now in Psychological Science 👉 doi.org/10.1177/0956... #Sociogenomics #MPRGBiosocial #MPIB A🧵

A must-read piece by @sashagusevposts.bsky.social I'll be That Guy™ and point out that this is why highly distributed pedigrees are used in evolution and animal breeding in nonexperimental settings. Sibs alone (esp. twins) give bad estimates. Good to see human gen getting on board.

🚨New preprint is out! How do genetic effects on complex traits change with age? In this work, we compare different approaches to obtain age-varying genetic effects, and show how design and modeling choices can impact the conclusions we draw. shorturl.at/17snd A thread 🧵👇

Sasha writes about our new study (led by bluesky-less Nikolai Eftedal) where we show how simple genetic models don't adequately fit correlations between multiple types of relatives. The mismatch between observed and expected correlations are interesting, which are explained well in his blog post:

I wrote a little bit about a cool recent paper looking at heritability estimates from very large registry data, and how we still really don't understand why outcomes track in families. A short 🧵:

We have a new preprint: this work is especially dear to my heart, as it results from the data collection pipeline we established at the Netherlands Twin Register, which enabled us to collect Facebook posts and likes (paid for with plenty of blood, sweat, and tears...) osf.io/preprints/ps...