Non-adherence is central to therapy research, and it's among the primary reasons I like ITT. Removing non-adherent persons from a therapy RCT would result in a causal estimand that has less relevance to real-world therapy than otherwise. Real world therapy clients don't perfectly comply.

New Paul Meehl Graduate School course: Advanced Basic Statistics Workshop: Deepening Your Understanding of Standard Statistical Analyses March 27, 2026 Sign up: paulmeehlschool.github.io/2026-02-23-a...

Lovely day in Eindhoven, and not just because of the weather! I had Maciej Behnke over as visitor for a few days to talk science and pick up an old collaboration! And @crist14n.bsky.social had Jenny Murphy, Simon Nolte, and Robert Rein over to talk computational reproducibility in Sports science.

The lack of uptake of sequential analysis shows how irrational scientists are, and how their methods are driven by norms. Sequential analyses give you more flexibility and are more efficient than a single hypothesis test, and yet, they are still very rare. lakens.github.io/statistical_...

Does your R-script work on your computer? Want to make it fully reproducible on ANY system, now and in the future? In this video, I demonstrate how to turn R scripts into reproducible, version-controlled projects with worcs, renv, targets, and testthat to verify reproducibility. youtu.be/3mgRFMr5APU

One of my two last (ever) papers on tDCS: Does anodal tDCS over M1 really enhance motor sequence learning? A non-replication of earlier findings in a double-blind, pre-registered large-sample study in humans www.medrxiv.org/content/10.1...

Call for Submissions for the Theory Methods Conference 2026, September 30-October 2! theorymethodssociety.org/conference.h... We invite you to: 1) Submit your proposal: edu.nl/mj9x6 2) Invite your colleagues/lab/(PhD) students, and encourage them to submit 3) Share this post

@andrew.heiss.phd joined us on the DS Lab, shared his screen with us, and spilled all of his secrets. You REALLY want to watch this: youtu.be/kqYbJoebrwE (links galore in the description!) And follow along with all the tools he mentions here on his blog post: andhs.co/dsl #databs #rstats #Positron

We continue with James Steele (wearing his 'stay calm and read Paul Meehl' shirt) who is in a high pace running us through his views on how we develop and test strong theories. #PSE8

Next free online INSPECT-SR training workshop on March 6th. Register here: www.trybooking.com/uk/FZUN Timed for Europe. Will try to add something for North America in the next few days...

New short blogpost! There are probably many benefits of sharing clinical trial data, including: Verifying results, better meta-analysis, understanding inconsistent results, further exploration, better clinical decision-making, learning how to run trials better, and reducing redundancy.

What Quarto extension would make your workflow easier? There are already almost 300 extensions browsable at m.canouil.dev/quarto-exten... and installable via Quarto Wizard at m.canouil.dev/quarto-wizard/. Drop your ideas below. If there's enough interest, I might just build it. #Quarto #OpenSource

New blog post introducing Causion - a web app for causal inference teaching and learning: pedermisager.org/blog/causion....

First post of the year, new paper out today: we present possibly the biggest case of systematic Measurement Schmeasurement in tech use. It seems that most studies on gaming (videogame) addiction/disorder haven't measured gaming after all. This research took years, so long 🧵 doi.org/10.1098/rsos...

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

Is anyone here an expert on #rstats ellmer structured data? It works when I define the JSON schema of an object A containing an array of object B, but not when I read object B from JSON schema and use type_object and type_array to set up object A. Reprex: gist.github.com/debruine/d35...

The full program of the Perspectives on Scientific Error conference is live! perspectivesonscientificerror2026.wordpress.com Keynotes: Leif Nelson about catching liars, Vlasta Sikimić about Science in the Age of AI, František Bartoš on Robustness Reports, and Femke Truijens on error in methods.

Here it is! #rstats

Our publishing system does not prioritise or value the careful curation of research data to be FAIR nearly enough. I have been data editing for AP&P for a year now, and it is sad to see no reward for the clearly careful organisation of data and materials vs that which is thrown on OSF with no care!

The program for the Perspectives on Scientific Error conference Februari 11 to 13 in Leiden is online! Registration is open! perspectivesonscientificerror2026.wordpress.com This is one of the most inspiring and fun metascience meetings around - lots of time to interact, great talks - so do come!

Pseudoreplication is a common issue in biomedical studies, Nicely illustrated here: pubpeer.com/publications... And good explainer, with R code for analysing such data here: www.wiley.com/en-ie/Basic+... #statistics

You can sign up until January 23 for the free Paul Meehl Graduate School workshop on Scientific Criticism and Peer review taught by René Bekkers. It promises to be an extremely interesting day, so do join us in Eindhoven on January 30th! paulmeehlschool.github.io/workshops/cr...

“Assessing the properties of the prediction interval in random-effects meta-analysis” www.cambridge.org/core/journal...

How long should it take to retract a paper with incontrovertible signs of data fabrication? Sleuths think 2 months is too long, particularly when clinical risks are involved. deevybee.blogspot.com/2026/01/an-o... #retraction #stemcells #cardiology @erictopol.bsky.social

Very happy to have received a replication grant from NWO! We will be reproducing power analyses of large scale replication projects, to learn how to improve power analyses, and increase quality control in large team Science projects! www.openscience.nl/en/news/27-s...

“Dutch people cycle an average of 2.6km each per day. If this pattern was replicated worldwide, annual carbon emissions would drop by 686 million tonnes. This mammoth figure exceeds the entire carbon footprint of most countries, including the UK, Canada, Saudi Arabia and Australia.” @euronews.com

So, folks might recall the great BMR series of articles from the MacroFactor team last year. One of the articles tackled the challenges women with polycystic ovary syndrome (PCOS) face with respect to managing their weight, and claims that this is in part due to "slower metabolism" 🧵1/7

Just had our first set of reviews from @pci-regreports.bsky.social for our proposed study on RT during GLP-1-RA treatment. Probably the most constructive and useful set of reviews I have ever had... and having them before starting the study makes them even better! 11/10 would recommend!

Metacheck can now automatically 1) download a preprint from PsyArXiv, 2) create a report of the checks (stats, reporting guidelines, references, code, etc), 3) retrieve the authors email, and 4) send them the report. Would you as an author appreciate this? When yes, when no?

Yes, we will have a module that is pretty good at detecting power calculations, and providing suggestions on how to do this more completely. @crist14n.bsky.social is building it!

We just preprinted a huge meta-meta-analysis examining the effects of exercise on cognition, memory, and executive function In short - 2239 effect sizes - extreme between-study heterogeneity - extensive publication bias - some subgroup/exercise-specific effects More below (doi.org/10.31234/osf...)

No industry is perfect. But the imbalance is hard to miss. One sector must prove its products are safe & effective. The other profits by avoiding that responsibility. If we care about transparency and accountability, scrutiny shouldn’t be one-sided. (Source: For The Greater Glory of Science) #EpiSky

Yes, ChatGPT can help you write #rstats code, but so can this old Wiki I created with example code used for common data wrangling needs. Who knows, you might find some gems in there.🤷‍♀️ github.com/Cghlewis/dat...

1. Ran Tian: Statistical Practice in Sport and Exercise Science: A Meta-Research Study. We studied 146 studies. Most used multilevel models or t-tests/correlations/ANOVA. In 27% the wrong methods were used (statistical test did not match data structure). Collaborate with a statistician! #AIMOS2025

Has anyone tried the trackdown package for collaborative quarto editing? Love writing papers on Quarto, but switching back to Word for co-author edits is still an awkward missing link claudiozandonella.github.io/trackdown/

ellmer 0.4.0 is out now! New features include Claude caching & file uploads, support for newer OpenAI responses API, web search tools, and better security. Read more at tidyverse.org/blog/2025/11... #rstats

I recently discovered Conventional Comments (conventionalcomments.org) for providing a pseudo-standard set of labels for feedback and just tried it for an article review and it was really helpful to specify issues vs. thoughts vs. suggestions, etc. Hopefully it's helpful for the authors too!

Key Concepts in Clinical Epidemiology Estimands: what they are and why we should use them. Brennan C. Kahan, Declan Devane. Journal of Clinical Epidemiology. www.sciencedirect.com/science/arti...

TU/e has gained a new research centre: META/e. Daniël Lakens and Krist Vaesen were among the founders of this knowledge hub for metascience—research aimed at improving the practice of science itself. “We want to be a home for every researcher who occasionally wonders: what are we even doing?”

Registration is now open for our Quarto workshop at Paul Meehl Graduate School! Join us on December 12 in Eindhoven to learn how to use Quarto for reproducible research and communication. More details and registration here: paulmeehlschool.github.io/2025-11-03-q...

It seems, I was not up-to-date. Discipline specific examples have already been discussed, or should I say "will be discussed" ;) Your output is insane! @crist14n.bsky.social sportrxiv.org/index.php/se... bsky.app/profile/cspa...

The package formerly known as papercheck has changed its name to metacheck! We're checking more than just papers, with functions to assess OSF projects, github repos, and AsPredicted pre-registrations, with more being developed all the time. scienceverse.github.io/metacheck/

The term #estimand is now part of the technical language of trials - but it remains a concept that many find hard to understand. Recent work has aimed to make the term more accessible to researchers, patients & public 1/8 #MethodologyMonday #127

Just discovered this great preprint by @crist14n.bsky.social @lakens.bsky.social sportrxiv.org/index.php/se... I wish someone had given me tutorials/easy-to-understand explanations like these when I was doing my bachelor's degree!

New paper finds that selective reporting remains the most replicable finding in science: journals.sagepub.com/doi/full/10.... I especially like their new exploratory metric 'p-values per participant'. Some papers had 11 p-values per participant! 🤯

There still seems to be a lot of confusion about significance testing in psych. No, p-values *don’t* become useless at large N. This flawed point also used to be framed as "too much power". But power isn't the problem – it's 1) unbalanced error rates and 2) the (lack of a) SESOI. 1/ >

Are you interested in thinking about which studies are worth replicating? Then you have 10 articles to dig into in Meta-Psychology, representing a very wide range of viewpoint on this topic, out now: open.lnu.se/index.php/me...

New release of PowerLMM.js! Browser-based power analysis for longitudinal models with dropout. Now includes: - Power analysis summary report - Reproducible & shareable configs (URL/JSON) - Calculations validated against R - Hypothesis region visualization powerlmmjs.rpsychologist.com

Struggling to keep your research data organized and reusable? 📂 The LMU Open Science Center has a tutorial to help bring order and accessibility to your datasets. Self-Paced Tutorial of the Day: FAIR Data Management 📚 lmu-osc.github.io/FAIR-Data-Ma...

We wrote an article explaining why you shouldn't put several variables into a regression model and report which are statistically significant - even as exploratory research. bmjmedicine.bmj.com/content/4/1/.... How did we do?