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 🧵

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

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/

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...

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

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

Statcheck the Game — Galvoro

Publish or perish — a satirical card game about meta-science.

galvoro.app

27 new videos on research methods and statistics are now live on my YouTube channel! 🧵 www.youtube.com/playlist?lis...

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...

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...

link.springer.com

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

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...

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

Exam prep for a research and statistics exam in 2026! sachaepskamp.com/PL2132_games...

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).

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...

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.

cran.r-project.org

The largest #Rstats 📦psychonetrics update so far is on its way to CRAN!

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

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.

Last day prep for the 2026 Australasian mathematical psychology conference at @NUSingapore! #ampc26sg

Super excited to be hosting Australasian Mathematical Psychology conference this week in Singapore! #ampc26sg ampc2026.com

New website online! Including links to all publications and recent presentation + workshop slides! www.sachaepskamp.com

Excited to be leading my new lab at the NUS Department of Psychology!

Only one week left to submit abstracts for the 2026 Australasian Mathematical Psychology conference! Come join us in Singapore this February! ampc2026.com

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!

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

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

Welcome to the world Luna! And happy birthday to your big brother turning 4 already ❤️

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-...

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

I uploaded some #Rstats tutorial videos on ggplot2, tidyr and dplyr: www.youtube.com/playlist?lis...

R for data science - YouTube

This playlist contains tutorials on how to use R for data science in psychology.

youtube.com

Very honored to be among the new APS Fellows! www.psychologicalscience.org/members/fell...

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.

psychologicalscience.org