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Sacha Epskamp

@sachaepskamp.bsky.social
4K followers 162 following 106 posts

Associate professor at the National University of Singapore

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Sacha Epskamp @sachaepskamp.bsky.social · 28/09/2026
This December, @adelaisvoranu.bsky.social and I are hosting two consecutive 3-day workshops on network psychometrics in Singapore 🇸🇬 Workshop 1: foundations, theory & cross-sectional analysis Workshop 2: psychometric modeling & longitudinal analysis Details: fass.nus.edu.sg/psy/network-...
fass.nus.edu.sg
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Reposted by Sacha Epskamp
Adela Isvoranu @adelaisvoranu.bsky.social · 23/09/2026
I've been noticing that “cross-sectional” has become shorthand for “methodologically weak” in (network) research, and often data being cross-sectional is treated as a methodological objection in itself. I took some time to put my thoughts down in writing. Pre-print: osf.io/preprints/ps... 🧵⬇️
osf.io
OSF
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Sacha Epskamp @sachaepskamp.bsky.social · 18/07/2026
Ahead of our #IMPS2026 short course this Monday, I updated 8 #RStats packages and submitted new versions to CRAN: qgraph 1.10.1 psychonetrics 0.16.9 bootnet 1.9.1 mlVAR 0.7.2 semPlot 1.2.0 parSim 0.4.0 graphicalVAR 0.4.1 IsingSampler 0.5.0 Highlights 🧵
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gajniyarovigor.bsky.social @gajniyarov.mindstrata.ru · 21/06/2026
Psychometricians model networks. Here is a map of theirs. 1,952 scholars. Coauthorship and citation data. Find yourself: completely-different.mindstrata.ru How many hops away are you from Sacha or Denny? @sachaepskamp.bsky.social @pmetricsoc.bsky.social #PsychSciSky #PSYNETS2026 #IMPS2026
Full interface of the web app showing an interactive network graph of 1,952 psychometrics scholars, with search filters on the left, connection paths on the right, and a timeline slider at the bottom.
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Sacha Epskamp @sachaepskamp.bsky.social · 25/06/2026
I found the official FIFA app for the World Cup to be far too confusing, so I made my own website that just shows the results clearly and nothing else. It allows highlighting of two teams (Netherlands and Curacao by default). sachaepskamp.com/FIFA2026/
sachaepskamp.com
World Cup 2026 — Schedule Explorer
A clean, fast way to explore the 2026 FIFA World Cup groups and knockout bracket.
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Sacha Epskamp @sachaepskamp.bsky.social · 26/05/2026
New pre-print! Estimating Network Temperature Through Multi-Group Ising Modeling - bridging measurement invariance and Ising modeling. pre-print: osf.io/preprints/ps... Galvoro explainer: galvoro.app/capsules/net...
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Sacha Epskamp @sachaepskamp.bsky.social · 16/05/2026
I spent the past semester building interactive teaching apps with AI-assisted coding. I used my personal website to share them with my students, but that makes them hard to find for other educators. So I built Galvoro — galvoro.app
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Sacha Epskamp @sachaepskamp.bsky.social · 14/05/2026
Eight years ago, @adelaisvoranu.bsky.social and I made a card game called Statcheck: The Game for friends who like verifying each other's statistical accuracy! But what if you don't have any friends?! The first online version against CPUs is now playable: 🔗 galvoro.app/capsules/statcheck-the-game
galvoro.app
Statcheck the Game — Galvoro
Publish or perish — a satirical card game about meta-science.
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Sacha Epskamp @sachaepskamp.bsky.social · 24/04/2026
27 new videos on research methods and statistics are now live on my YouTube channel! 🧵 www.youtube.com/playlist?lis...
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Reposted by Sacha Epskamp
Dan McNeish @dmcneish.bsky.social · 23/04/2026
New paper— everyone is collecting intensive longitudinal data but recent review studies report that less than half of studies consider measurement/psychometrics. The paper covers a few foundational psychometric methods for ILD and provides a shiny app to apply them link.springer.com/article/10.3...
link.springer.com
A primer on intensive longitudinal psychometrics - Behavior Research Methods
Many intensive longitudinal studies are interested in topics that are not always amenable to direct physical measurement and instead are often theorized as latent constructs (e.g., affect, emotion, mo...
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Sacha Epskamp @sachaepskamp.bsky.social · 23/04/2026
My last game was frequentist. This one's Bayesian. In BATTLE BAYES you're M₀, the intercept-only null model — fed up with being rejected. Collect evidence, INTERCEPT your rivals' excess θ, get SELECTED. Yes, the button name is a pun. sachaepskamp.com/battle_bayes/ #rstats #statsed #bayesian
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Sacha Epskamp @sachaepskamp.bsky.social · 21/04/2026
EXTREME GALTON now also contains a "LEARN" mode to run simulations and learn more about sampling and the central limit theorem. No bazookas though... sachaepskamp.com/extreme_galt...
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Sacha Epskamp @sachaepskamp.bsky.social · 20/04/2026
After 150 years of boring wooden Galton boards, I finally fixed it! Now with lasers, bazookas, bombs, pinball bumpers, and extremely serious sci-fi hamsters. 🎯 EXTREME GALTON 👇 sachaepskamp.com/extreme_galton
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Sacha Epskamp @sachaepskamp.bsky.social · 18/04/2026
Exam prep for a research and statistics exam in 2026! sachaepskamp.com/PL2132_games...
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Xinkai Du @xinkaidu.bsky.social · 20/03/2026
Thrilled to share that our work (with Sverre Urnes Johnson and @sachaepskamp.bsky.social) on invariance partial pruning (IVPP), a novel approach to comparing networks in time-series and panel data is now online at Psychological Methods 10.1037/met0000824 (preprint link: 10.31234/osf.io/vb8dz_v2).
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Sacha Epskamp @sachaepskamp.bsky.social · 18/03/2026
mlVAR #Rstats 📦 version 0.6.1 is now on CRAN! Major updates include the mlGGM function for multi-level GGM estimation on nested cross-sectional data (e.g., students nested in classrooms) and the inclusion of residuals + predicted values from the mlVAR results. cran.r-project.org/web/packages...
cran.r-project.org
mlVAR: Multi-Level Vector Autoregression
Estimates the multi-level vector autoregression model on time-series data. Three network structures are obtained: temporal networks, contemporaneous networks and between-subjects networks.
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Sacha Epskamp @sachaepskamp.bsky.social · 26/02/2026
The largest #Rstats 📦psychonetrics update so far is on its way to CRAN!
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Sacha Epskamp @sachaepskamp.bsky.social · 25/02/2026
Last day of AMPC 2026 at NUS — the first time this conference was held in Asia! Thank you to all the speakers, participants, co-organizers, and volunteers for an incredible three days. #AMPC2026 #ampc26sg #MathematicalPsychology #NUS #Singapore
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Sacha Epskamp @sachaepskamp.bsky.social · 23/02/2026
Why use Powerpoint, LaTeX or Markdown if you can just vibe-code anything you want... For #ampc26sg I re-created my slides as an immersive online slide-deck: sachaepskamp.com/AMPC2026/. Including support for mobiles to scroll through the presentation.
sachaepskamp.com
psychonetrics — AMPC 2026 Talk
Introducing psychonetrics for psychometric network modeling and SEM — AMPC 2026.
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Sacha Epskamp @sachaepskamp.bsky.social · 22/02/2026
Last day prep for the 2026 Australasian mathematical psychology conference at @NUSingapore! #ampc26sg
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Sacha Epskamp @sachaepskamp.bsky.social · 20/02/2026
Super excited to be hosting Australasian Mathematical Psychology conference this week in Singapore! #ampc26sg ampc2026.com
ampc2026.com
AMPC 2026 | Website for the Australasian Mathematical Psychology Conference 2026
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Sacha Epskamp @sachaepskamp.bsky.social · 20/02/2026
New website online! Including links to all publications and recent presentation + workshop slides! www.sachaepskamp.com
sachaepskamp.com
Sacha Epskamp — Associate Professor, NUS
Network psychometrics, longitudinal modeling, and open-source statistical software.
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Sacha Epskamp @sachaepskamp.bsky.social · 23/01/2026
Excited to be leading my new lab at the NUS Department of Psychology!
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Sacha Epskamp @sachaepskamp.bsky.social · 20/11/2025
Only one week left to submit abstracts for the 2026 Australasian Mathematical Psychology conference! Come join us in Singapore this February! ampc2026.com
ampc2026.com
AMPC 2026 | Website for the Australasian Mathematical Psychology Conference 2026
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Sacha Epskamp @sachaepskamp.bsky.social · 13/10/2025
Please share! There are still spots available for my 3-day workshop on psychometric network modeling of longitudinal data in Singapore Dec 11 - 13! fass.nus.edu.sg/psy/network-... The workshop can be combined with a workshop Dec 8 - 10 on Foundations, Theory, and Cross-sectional Data Analysis!
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Sacha Epskamp @sachaepskamp.bsky.social · 03/09/2025
Excited to be hosting the AMPC conference on mathematical psychology, psychometrics and behavioral data science in Singapore this February! Please share with whoever might be interested! ampc2026.com
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Sacha Epskamp @sachaepskamp.bsky.social · 25/08/2025
Very excited to host two events in Singapore: the professional certification workshops on Network Psychometrics in Decemer and the 2026 edition of the Australasian Mathematical Psychology conference in February! Links for registration below. fass.nus.edu.sg/psy/network-... ampc2026.com
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Sacha Epskamp @sachaepskamp.bsky.social · 13/07/2025
Welcome to the world Luna! And happy birthday to your big brother turning 4 already ❤️
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Sacha Epskamp @sachaepskamp.bsky.social · 26/06/2025
Happy to share that our article, led by @xinkaidu.bsky.social, on confirmatory network modeling has been published in Psychological Methods! psycnet.apa.org/record/2026-...
psycnet.apa.org
APA PsycNet
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Sacha Epskamp @sachaepskamp.bsky.social · 16/05/2025
Save the date! Next year we will host the 2026 Australasian Mathematical Psychology Conference in Singapore! Including research in mathematical psychology, computational modeling, psychometrics and data science / AI! #AMPC26SG
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Sacha Epskamp @sachaepskamp.bsky.social · 10/03/2025
I uploaded some #Rstats tutorial videos on ggplot2, tidyr and dplyr: www.youtube.com/playlist?lis...
youtube.com
R for data science - YouTube
This playlist contains tutorials on how to use R for data science in psychology.
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Sacha Epskamp @sachaepskamp.bsky.social · 01/03/2025
Very honored to be among the new APS Fellows! www.psychologicalscience.org/members/fell...
psychologicalscience.org
APS Fellows
Fellow status is awarded to APS members who have made sustained outstanding contributions to the science of psychology in the areas of research, teaching, service, and/or application.
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Advances.in @advances.in · 20/09/2024
🚀 New Article Alert! "Observed correlations between person-means depend on within-person correlations" By Jonas Haslbeck (@jmbh.bsky.social) & Sacha Epskamp (@sachaepskamp.bsky.social) advances.in/psychology/1...
advances.in
Observed correlations between person-means depend on within-person correlations
This paper highlights how within-person correlations affect between-person correlations, with implications for statistical interpretation.
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Sacha Epskamp @sachaepskamp.bsky.social · 24/09/2024
I gave a 2-hour workshop on Structural Equation Modeling and Confirmatory Factor Analysis in lavaan for the Psych #rstats Club. the recording is available here: youtu.be/YrxvV8zlNLY?... Supported by @improvingpsych.org!
youtu.be
Introduction to CFA & Structural Equation Modelling in R
YouTube video by Psych #rstats Club
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Sacha Epskamp @sachaepskamp.bsky.social · 01/08/2024
Super excited today to teach the first summer school / workshop on longitudinal network modeling in Singapore and to receive the first ever translation (in Japanese!) of our textbook!
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Sacha Epskamp @sachaepskamp.bsky.social · 28/07/2024
Did anyone check if the #Paris2024 Olympics mascot follows a normal density?
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Sacha Epskamp @sachaepskamp.bsky.social · 23/07/2024
Updated preprint on potential bias in mlVAR between-person network results! osf.io/preprints/ps...
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Sacha Epskamp @sachaepskamp.bsky.social · 02/07/2024
Two more weeks to register for our workshops on network psychometrics and longitudinal data modeling in Singapore next month! Registration closes July 15. fass.nus.edu.sg/psy/network-...
fass.nus.edu.sg
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Sacha Epskamp @sachaepskamp.bsky.social · 24/06/2024
Very excited to teach the first ever workshop on psychonetrics at the Modern Modeling Methods (M3) conference in Storrs, Connecticut today! All materials are now available on the OSF: osf.io/dax8g/
osf.io
Psychometric network modeling with psychonetrics
Workshop materials for the Modern Modeling Methods (M3) 2024 pre-conference workshop Hosted on the Open Science Framework
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Sacha Epskamp @sachaepskamp.bsky.social · 20/06/2024
Just in time for the Modern Modeling Methods (M3) conference starting this Monday (modeling.uconn.edu), #Rstats 📦 psychonetrics version 0.13 is now on CRAN! This version (finally) includes bootstrap methods for accuracy and stability checks.
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Sacha Epskamp @sachaepskamp.bsky.social · 28/05/2024
Interested in Network Psychometrics? This summer there are workshops in three different continents! June 24 (US): modeling.uconn.edu July 1 - July 4 (Netherlands): psychosystems.org/psynets-work... July 29 - August 3 (Singapore): fass.nus.edu.sg/psy/network-...
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Sacha Epskamp @sachaepskamp.bsky.social · 22/05/2024
Just in time for #aps24sf, the psychonetrics #Rstats package for (dynamic) SEM and network psychometrics has been updated to version 0.12 on CRAN! This is a massive update that should resolve many issues with the package (e.g., convergence issues and poor start values).
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Sacha Epskamp @sachaepskamp.bsky.social · 18/05/2024
I am teaching "Research and statistics II" for the first time next semester, which covers ANOVA, correlational/regression analysis and basic psychometrics. I will teach the course using @JASPStats and I am looking for potential textbooks to use for this course. Any suggestions are very welcome!
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Michèle Nuijten @michelenuijten.bsky.social · 17/05/2024
Ok I'm a million years late to the party, but I finally found my way to bluesky! ✋ Hi! I'm Michèle, a meta-scientist interested in statistical errors & improving overall robustness of psychological science. 🙏 If anyone has tips to build up my network here, please let me know!
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Eiko Fried @eikofried.bsky.social · 25/04/2024
3/3 We also look at two families in detail (who had most data) & conduct simulation studies. Thx to all co-authors, incl @sachaepskamp.bsky.social. Paper: www.tandfonline.com/doi/full/10....
tandfonline.com
A Network Study of Family Affect Systems in Daily Life
Adolescence is a time period characterized by extremes in affect and increasing prevalence of mental health problems. Prior studies have illustrated how affect states of adolescents are related to ...
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Reposted by Sacha Epskamp
Omid V. Ebrahimi @omidvebrahimi.bsky.social · 15/04/2024
📜New article w/Borsboom, @sachaepskamp.bsky.social, Hoekstra, Ostinelli, Bastiaansen & A. Cipriani Towards precision in the diagnostic profiling of patients: leveraging symptom dynamics as a clinical characterisation dimension in the assessment of major depressive disorder🧵 doi.org/10.1192/bjp....
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Sacha Epskamp @sachaepskamp.bsky.social · 02/03/2024
We still have a few open spots for the National University of Singapore professional certification on network psychometrics this summer! See for more info fass.nus.edu.sg/psy/network-....
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Sacha Epskamp @sachaepskamp.bsky.social · 13/02/2024
Incredibly honored to be awarded the @psychscience.bsky.social Janet Taylor Spence award and to see @adelaisvoranu.bsky.social recognized as Rising Star. Given all we faced together, I can't express what an honor it is to be recognized this way at the same time. t.co/5izLnkXk3W t.co/Giy2a99apl
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PsyArXivBot @psyarxivbot.bsky.social · 05/12/2023
Cross-Lagged Panel Models for Studying Psychopathology: A Comparative Overview of Structural Equation and Panel Network Approaches: osf.io/b94qt
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Reposted by Sacha Epskamp
Gilad Feldman @giladfeldman.bsky.social · 22/01/2024
Upcoming hybrid talk at National University of Singapore (NUS) psychology: "Registered Reports & Peer Community in Registered Report @pci-regreports.bsky.social are the future of science: Sharing experience from 25+ Replication & extensions Registered Report submissions" Details 👇
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