Should meta-science articles hold themselves to the same standards of transparency and reproducibility that the field prescribes for others? We think so. New preprint and 🧵

A while back, I wrote a thing. If you like experiments and causal inference, you should read it:

New paper, on a worrying trend in meta-science: the practice of anonymising datasets on, e.g., published articles. We argue that this is at odds with norms established in research synthesis, explore arguments for anonymisation, provide counterpoints, and demonstrate implications and epistemic costs.

"Model to Meaning" just received a super generous review in JASA. Check it out! (I'm blushing 😊) Reminder: You can get the paper copy from CRC, and the full **free** version will remain online forever at marginaleffects.com www.tandfonline.com/doi/full/10....

What does mentorship when you are old enough/far enough in your career to be someone else’s mentor?

This chapter on multicollinearity is a zinger, especially the central point in Section 23.4. If your focus is on model *predictions*, multicollinearity isn't necessarily a problem, and it might even be good. Well posted, @chrisadamsecon.bsky.social!

Feeling some appreciation for @lnalborczyk.bsky.social's logit dot plots (lnalborczyk.github.io/blog/2018-01...).

Does it make sense to preregister simulation studies? This question has sparked a lot of debate. ▶️We* work through the why, when, and how ▶️We discuss different phases of methodological research to clarify where preregistration might (or might not) add value 📝 Preprint: doi.org/10.31234/osf...

dplyr 1.2.0 is out now and we are SO excited! - `filter_out()` for dropping rows - `recode_values()`, `replace_values()`, and `replace_when()` that join `case_when()` as a complete family of recoding/replacing tools These are huge quality of life wins for #rstats! tidyverse.org/blog/2026/02...

You can easily switch between magrittr pipe `%>%` and base pipe `|>` in the RStudio settings 🧰 #rstats #dataviz #phd

I reviewed an earlier version of this paper. I think it's interesting, because you can tell by reading it that evolutionary psychology still lacks a loyal opposition and a healthy error culture. It's a defensive paper, targeted at people who believe evolution stops at the neck, YouTubers, _others_

🚨 GAMs have moved on—so it’s time for an update. On March 3, 2026 (17:00–19:00 CET) I’ll be livestreaming an updated introduction to Generalized Additive Models in R 📺 YouTube livestream link: youtube.com/live/A9U8e1K... #RStats #mgcv #GAMs #gratia #statistics 🧪

What's the best open book for data science from a base-R perspective? #rstats

For a weekly seminar class, I'm looking for pairings of psych popularization with scholarly take-downs of the underlying research. I want students to see examples of how shoddy research gets hyped.

#rstats bat signal: If any of y'all have experience with multilevel multinomial logistic regression, with {brms}, Kruschke and I could use your help. This is your chance to influence the upcomming textbook. discourse.mc-stan.org/t/problem-in...

All my #rstats ebooks are now in the quarto format, and hosted on Quarto Pub. Their old bookdown links will all be dead by the weekend. 1/3

Comparing registrations to published papers is essential to research integrity - and almost no one does it routinely because it's slow, messy, and time-demanding. RegCheck was built to help make this process easier. Today, we launch RegCheck V2. 🧵 regcheck.app

Missing data, DAG, #stats folk: There was a paper that explained missing data mechanism w/ DAGs, showing they're equivalent to conditioning on collider &/or ignoring confounding.. It was a simple paper for dummies (like me!) but earching for papers I've only found scary c-DAG and m-DAG stuff...😨

The 0.5.0 version of my {brms} + {tidyverse} translation of McElreath's "Statistical Rethinking" (2nd ed) is up! solomon.quarto.pub/sr2/ 1/3 #rstats

> "There is no suggestion of malpractice" The article's pubpeer thread would strongly disagree. pubpeer.com/publications...

📣 Our lab is hiring a full-time RA/lab manager! Join us in beautiful Santa Barbara to study the neural bases of affect-cognition interactions using fMRI and brain stimulation. Great stepping stone to a PhD in cognitive/affective neuro 🧠🐬🏖️ Apply by Jan 22: recruit.ap.ucsb.edu/JPF03048

hey European hivemind, I need some help...PhD students here, especially foreign ones, are feeling a lot of concern related to evolving immigration restrictions here. Those students are increasingly looking to postdocs in EU. To help advise them better, what are expectations for postdocs? 1/2

I saw this chart in the wild a few days ago and it's been on my mind because the longer I look at it, the more confused I become by it. 📊 I'm fairly sure it's AI generated for a few reasons... A #DataViz thread 🧵

✨New blog post✨ I break down the beautiful data visualizations from a New America report (cowritten by @oscarp.bsky.social) and try to recreate them in R using ggplot2. danielroelfs.com/posts/new-am...

The 1.3.0 version of my {brms} + {tidyverse} translation of Kruschke's "Doing Bayesian data analysis" is up! solomon.quarto.pub/dbda2 #rstats 1/8

Is one of your goals for 2026 to write more? One question I get all the time is, "How do you make time to write?" So, here is my unsolicited writing advice for the new year:

I have put together an index page compiling my various #rstats blog posts using #Pacific island countries and territories; data: freerangestats.info/blog/pacific.... Topics such as choropleth maps of the Pacific, demographic techniques and trends, and multidimensional vulnerability.

I am looking for a psychometrician to consult on a short term project. Any recommendations for someone who has done a lot with IRT and test development?

You remember that Nature Aging paper about how multilingualism protects against accelerated aging? Well…

Did you know that from tomorrow, Qualtrics is offering synthetic panels (AI-generated participants)? Follow me down a rabbit hole I'm calling "doing science is tough and I'm so busy, can't we just make up participants?"

The "smartphones/social media" discourse suffers from some amazing historical amnesia. There was no 2008 financial crisis and no global pandemic starting in 2020, it's all SCREENS SCREENS SCREENS. Major world events? Just the backdrop against which SCREENS happened.

Psychologists, what are your favorite (open) data sets for teaching multilevel modelling? I have a lot of observational examples, would love a therapy RCT with varying effects for therapists or some such.

Critique argues post-publication peer review "often focuses on minor details" and "risks damaging trust in both the research itself and the peer review process" found to contain: - Hallucinated references - Undisclosed COIs (EiC is author) - 8/9 authors have retractions or related scandals

Another day, and another reference to these bangers. Contemporary causal inference has fundamentally changed the way I think about control variables and mediation analyses. These can show you why: doi.org/10.1177/2515... doi.org/10.1111/spc3... doi.org/10.1177/2515...

Favourite books from Taylor Routledge? Already have @vincentab.bsky.social ‘s book in my basket

Project Implicit gives you feedback when you complete an IAT, and the IAT literature has aspired to individual level measurement since its inception. In this article, we quantify the individual level uncertainty around these estimates and show that IAT effects can say very little about individuals.

Just published in Behavior Research Methods: The individual-level precision of implicit measures w/ @ianhussey.mmmdata.io 🧵👇 link.springer.com/article/10.3...

So...my undergrad thesis student is doing a quality analysis of studies found in meta-analyses. She identified a few and we contacted the authors to request their effect sizes and other variables for the studies in their papers. Here's what happened: scientiapsychiatrica.com/index.php/Sc...

in psych, whole subfields have decided to simply skirt the issue, so the causal inference happens in the introduction of the next paper that cites the "totally-not-causal-I-swear" paper and of course absolutely interprets it causally 🥲

Opening a new dataset for cleaning.

📢 Announcement: We are sunsetting the bookdown.org public hosting service. If you have #RStats docs on bookdown.org, please migrate them to a new platform by January 31, 2026, to maintain control over your content. (We recommend Posit Connect Cloud!) Learn more: posit.co/blog/bookdown-org-sunset

Friends of Arab and Muslim descent, please fill out our survey! Please share!

I am not familiar enough with calcium scores to know if this is weird. Is there any biochemical reason that all of these means/SDs would end in even numbers?

Want to make nice graphs with me, starting next year? I'm hiring for a position at the University of Witten/Herdecke. uni-wh.softgarden.io/job/61280592...

Works the other way around too. “If I was Jonathan Haidt, how would I destroy the next generation?”

Applied longitudinal data analysis in brms and the tidyverse by A Solomon Kurz #RStats https://bigbookofr.com/chapters/statistics.html#applied-longitudinal-data-analysis-in-brms-and-the-tidyverse

"In 2019 we notified journals about serious integrity concerns in 172 clinical trials. Over five years later, only 22 have been retracted. The 135 unretracted trials have 1989 citations in systematic reviews, clinical guidelines, and consensus statements" [paraphrased] www.bmj.com/content/390/...

I don't know how I've missed it because it's *right on the documentation home page*, but if you use {glue} for nice string interpolation in #rstats and you have {stringr} loaded (likely through the tidyverse), you can use str_glue() instead of glue::glue() or loading library(glue) glue.tidyverse.org

Agreed. Of the pozoles, green is my favorite. But red pozole is pretty good, too. I lost some weight during the first two years of the pandemic, and hearty soups like green pozole with chicken were a big part of my meal plan. Here's a recipe from Kenji: youtu.be/u536QQp4oQ4?...

A colleague is looking for an open-source/online (pref. peer-reviewed) reference for properties of probability distributions. Any ideas? (NIST gives *very* basic properties e.g. www.itl.nist.gov/div898/handb... but I think they're looking for something more complete ...)