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Dirk Pelt

@dirkpelt.bsky.social
106 followers 94 following 28 posts

Assistant Professor at Biological Psychology, VU Amsterdam. individual differences, wellbeing, personality, social desirability, psychometrics, behavior genetics

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Reposted by Dirk Pelt
Ludvig Daae Bjørndal @ludvigdb.bsky.social · 19/09/2026
I am thrilled to share this work - with the brilliant @michelnivard.bsky.social and @omidvebrahimi.bsky.social - in which we outline a framework to more closely align psychiatric genetics and aetiological research with the dynamics and complexities of mental disorders 🎯
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Dirk Pelt @dirkpelt.bsky.social · 15/07/2026
Here's the link again to the pre-print: osf.io/preprints/ps...
osf.io
OSF
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Dirk Pelt @dirkpelt.bsky.social · 15/07/2026
🎉Together, our findings underscore the importance of genetically informed designs in future (longitudinal) research aiming to disentangle top-down and bottom-up processes in life satisfaction. Thanks to the NTR participants and my co-author @meikebartels.bsky.social for making this study possible!
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Dirk Pelt @dirkpelt.bsky.social · 15/07/2026
❗Yet, we also found significant environmental correlations, implying associations between general and domain satisfaction cannot be explained solely by shared genetic factors, and may actually reflect causal processes. Results from intra-pair difference score analyses supported this interpretation.
Figures showing results from intra-pair difference score analyses on the associations between general life satisfaction and satisfaction domains.
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Dirk Pelt @dirkpelt.bsky.social · 15/07/2026
🧬😊 Next, again using twin-sibling models, even stronger genetic correlations between the satisfaction domains and general life satisfaction were found. Stable individual differences may thus predispose some people to be satisfied across the board - with life overall and with specific life domains.
Figures showing results from twin-sibling models decomposing variance in the associations between general life satisfaction and satisfaction domains.
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Dirk Pelt @dirkpelt.bsky.social · 15/07/2026
🧬Twin-sibling models on the domains again supported both processes. We also found substantial genetic overlap between satisfaction domains, suggesting that stable individual differences, including genetic factors, partly explain why some people are more satisfied across multiple areas of life.
Figures showing results from twin-sibling models decomposing variance in satisfaction domains.
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Dirk Pelt @dirkpelt.bsky.social · 15/07/2026
⬇️⬆️ Phenotypically, we found evidence for both bottom-up and top-down processes operating simultaneously. Interestingly, these processes differed across domains: friendship satisfaction appeared to be less influenced by general life satisfaction (i.e., less top-down) than job satisfaction.
Figures showing results on phenotypic associations between general life satisfaction and satisfaction domains.
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Dirk Pelt @dirkpelt.bsky.social · 15/07/2026
🧑‍🤝‍🧑We tested these bottom-up vs. top-down accounts of life satisfaction using twin & sibling data from the Netherlands Twin Register (N = 6,160) and genetically informative designs. Participants rated their general life satisfaction and satisfaction with friends, family, job, finances, and health.
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Dirk Pelt @dirkpelt.bsky.social · 15/07/2026
🆕 New pre-print! osf.io/preprints/ps... Are you satisfied with your life because you are satisfied with your friends, health, job, etc.? Or is it actually the other way around: are some people generally satisfied with their life and, because of this, satisfied with their friends, health, job, etc.?
osf.io
OSF
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Reposted by Dirk Pelt
Behavior Genetics Association @behaviorgenetic.bsky.social · 28/04/2026
⚠️ This BGA has turned out to be exceptionally popular with unprecedented numbers of submissions and people wanting to attend. We are now holding a waiting list for non-speakers (this includes symposia Chairs and Discussants) who have not yet registered.
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Dirk Pelt @dirkpelt.bsky.social · 31/03/2026
New pre-print! 🎉 osf.io/preprints/ps... Leveraging rich longitudinal Netherlands Twin Register data, we tested whether we could boost wellbeing prediction by incorporating features that capture trends over time. Massive project led by the talented @daveleitritz.bsky.social. See his 🧵for a summary!
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Dirk Pelt @dirkpelt.bsky.social · 07/02/2026
Note that I am not one of the authors, they deserve all credit. :) I am just a fan of the method :)
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Dirk Pelt @dirkpelt.bsky.social · 07/02/2026
From what I recall, yes, it's been a while since I read the paper :) it comes with MplusAutomation R code and worked well (quite some runtime though). I also remember a bug with variable names too long for Mplus.
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Dirk Pelt @dirkpelt.bsky.social · 07/02/2026
Yes as @dingdingpeng.the100.ci points out, this what you probably want: journals.sagepub.com/doi/full/10....
journals.sagepub.com
Sage Journals: Discover world-class research
Subscription and open access journals from Sage, the world's leading independent academic publisher.
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Reposted by Dirk Pelt
Eric Turkheimer @ent3c.bsky.social · 25/11/2025
Blog post: A Missing Heritability Update. Three legs and other problems. I follow up on the recent excellent post on the subject by @sashagusevposts.bsky.social. ericturkheimer.substack.com/p/missing-he...
ericturkheimer.substack.com
Missing Heritability Revisited
Following up on Sasha
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Reposted by Dirk Pelt
Eric Turkheimer @ent3c.bsky.social · 09/08/2025
New blog post: The New Eugenics Companies (Oops, I meant to say generational health and embryo selection)
ericturkheimer.substack.com
The New Eugenics Companies
Oops, I meant to say generational health and embryo selection
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Dirk Pelt @dirkpelt.bsky.social · 23/07/2025
Gefeliciteerd! En welcome back :)
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Dirk Pelt @dirkpelt.bsky.social · 15/07/2025
How did I not know this banger?
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Reposted by Dirk Pelt
Lorenzo Lorenzo-Luaces, PhD @lluaces.bsky.social · 15/07/2025
For the love of god put the sample size in the abstract
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Reposted by Dirk Pelt
Selim Sametoğlu @selimsametoglu.bsky.social · 11/07/2025
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...
osf.io
OSF
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Dirk Pelt @dirkpelt.bsky.social · 20/05/2025
So cool! Congrats to the whole team!
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Dirk Pelt @dirkpelt.bsky.social · 09/01/2025
Got it: journals.plos.org/plosone/arti...
journals.plos.org
Statistically Controlling for Confounding Constructs Is Harder than You Think
Social scientists often seek to demonstrate that a construct has incremental validity over and above other related constructs. However, these claims are typically supported by measurement-level models...
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Dirk Pelt @dirkpelt.bsky.social · 09/01/2025
Nevermind, got it! :) journals.plos.org/plosone/arti...
journals.plos.org
Statistically Controlling for Confounding Constructs Is Harder than You Think
Social scientists often seek to demonstrate that a construct has incremental validity over and above other related constructs. However, these claims are typically supported by measurement-level models...
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Dirk Pelt @dirkpelt.bsky.social · 09/01/2025
Also tagging @dmcneish.bsky.social (it's driving me nuts that I can't find it..)
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Dirk Pelt @dirkpelt.bsky.social · 09/01/2025
Kind of like when you have create a single indicator factor in a SEM model and fixing the residual variance of the indicator according to the (un)reliability. @michelnivard.bsky.social @dingdingpeng.the100.ci
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Dirk Pelt @dirkpelt.bsky.social · 09/01/2025
Help! I recently came across a paper on regression in a structural equation modeling framework where the authors argued that results should be contextualized by assuming different levels of (un)reliability of the variables (or something along those lines). Now I can't find it anymore! Anyone?
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Reposted by Dirk Pelt
ntrbiopsy.bsky.social @ntrbiopsy.bsky.social · 23/11/2024
NTR BioPsy is now active on BlueSky! Follow us for updates on scientific output from the Netherlands Twin Register and VU Biological Psychology department. Also follow us on LinkedIn: www.linkedin.com/company/nede...
linkedin.com
Nederlands Tweelingen Register/BioPsy | LinkedIn
Nederlands Tweelingen Register/BioPsy | 125 followers on LinkedIn. The Netherlands Twin Register is part of the Biological Psychology of the Vrije Universiteit Amsterdam (VU). Our research aims to exa...
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Dirk Pelt @dirkpelt.bsky.social · 30/10/2024
Broei!
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Dirk Pelt @dirkpelt.bsky.social · 28/10/2024
Yes, something along those lines! Plus, what about scaling issues: those with very low baseline (between person) values simply have less wiggle room to vary downwardly. For traits that are correlated at the between person level, this induces correlations between within-person fluctuations then, no?
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Dirk Pelt @dirkpelt.bsky.social · 28/10/2024
Very interesting! After reading this and your life satisfaction paper, I've been wondering how much of the variation we find is simply regression to the mean at the person level. Do you know any papers that systematically investigate/simulate this?
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Dirk Pelt @dirkpelt.bsky.social · 18/10/2024
Thanks for the honor @behaviorgenetic.bsky.social !
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Dirk Pelt @dirkpelt.bsky.social · 25/09/2024
This is neat! I am curious how much this approach differs from the work by Rosseel et al on factor score regression eg. psycnet.apa.org/record/2023-... journals.sagepub.com/doi/full/10....
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Dirk Pelt @dirkpelt.bsky.social · 02/03/2024
Ai, goeie timing idd
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Dirk Pelt @dirkpelt.bsky.social · 02/03/2024
Heb hetzelfde, ik moet naar de IT desk maandag..
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Dirk Pelt @dirkpelt.bsky.social · 24/11/2023
Neat study! I have seen the same in our work, these individual slopes correlate with very little. I am wondering the extent to which these slopes simply indicate regression to the mean...
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