I see many takes on the new Anthropic LLM-assisted programming study but no discussion about potential bias due to their financial interests in their own product?

I have made an R package for test equating using the Leunbach method. Thanks to the gracious sharing of DIGRAM source code by Svend Kreiner and some assistance of Claude Opus 4.5, the package `leunbachR` is now available on GitHub: pgmj.github.io/leunbachR/in... #rstats #psychometrics

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

I have a strong belief that scientific instruments like questionnaires should not be have the same copyright protection as other text. Yes you can assert authorship, no you can't stop people using it.

My favourite from 2025 using @ilfordphoto.com film. This (I think) is going to be the cover of my next zine... Ilford Ortho+ 80 developed with Ilfotec HC 1+31. Taken with a Bronica SQAi & 80mm. #fridayfavourites #2025fave #filmphotography

📢 The most recent volume of the Annual Review of Psychology is now online! The most read article so far is "How Do Psychologists Determine Whether a Measurement Scale Is Good? A Quarter-Century of Scale Validation with Hu & Bentler (1999)" by @dmcneish.bsky.social. arevie.ws/4jRYY6B

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

I've never experienced anything like this in my life, where people keep telling me that "we have to use AI or else we'll be left behind" but they don't actually tell me exactly what problem they are hoping to solve with the "AI" or how we would know it was useful. But we must use it! Apparently.

Here it is! #rstats

This is quite a post www.planetearthandbeyond.co/p/reality-is...

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

With more than 24h to the deadline, I have submitted an abstract to the Scandinavian Applied Measurement Conference. Join us to talk about #psychometrics and #measurement in Copenhagen, June 8-10th, 2026. biostat.ku.dk/SAMC/

FDA drugs and biologics guidance for Bayesian clinical trials is something I've been dreaming of for decades. I am thrilled that this draft has been released!! #Statistics #StatsSky #fda #clinicaltrial #bayes

This is the avant-garde preprint service (hosted on AT Protocol) that I've been dreaming of. If it's a small fraction of its vision down the road, I'd still be happy. Check out Chive (docs.chive.pub/getting-star...). - scholar owned - open/community peer review - semantic linking to terms

@bsky.app www.nytimes.com/2026/01/12/c... another naked example of profits over people!

After 5 years of data collection, our WARN-D machine learning competition to forecast depression onset is now LIVE! We hope many of you will participate—we have incredibly rich data. If you share a single thing of my lab this year, please make it this competition. eiko-fried.com/warn-d-machi...

My poster got allocated prime real estate at the conference: High traffic, captive audience.

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

I'm writing a report with a deadline two days from now and Word keeps crashing 2-3 times a day. While the document is lengthy and has a lot of figures, it is just astounding that Microsoft haven't been able to make this program more stable after 40+ years of development.

"40 percent of MRI signals do not correspond to actual brain activity"; "Since tens of thousands of fMRI studies worldwide are based on this assumption, our results could lead to opposite interpretations in many of them.” www.tum.de/en/news-and-...

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...

Keeping this at hand in case I need to point to it and tap

Today’s example of “self reported behaviour is a poor proxy of behaviour”: environmental behaviour

geomtextpath can really help make a plot easier to interpret. Nice to avoid using a legend. #rstats #dataviz

Fifteen Years xkcd.com/3172/

Meta halted internal research that purportedly showed (young) people who stopped using Facebook became less depressed and anxious, according to an unredacted legal filing released on Friday. www.cnbc.com/2025/11/23/m...

More tinkering with relative measurement uncertainty proposed by @bignardi.bsky.social et al, using plausible values to estimate conditional reliability (inspired by @dmcneish.bsky.social) for Rasch models with WL estimation of latent scores. Code here: github.com/pgmj/easyRas...

They're going to crash the global economy by attempting to create an artificial general intelligence, despite having no idea what that is, no proof they can build it & no hope of doing so. Cunts just read too many sci-fi books.

Everyone involved in scientific publishing should take a look at these papers. >"The domination of scientific publishing in the Global North by major commercial publishers is harmful to science; we need [...] to re-communalise publishing to serve science not the market."

Two-group pre/post data are deceptively simple, and you could analyze them in many different ways, depending on your goals. Here are three blog posts on the topic: solomonkurz.netlify.app/blog/2022-06... solomonkurz.netlify.app/blog/2020-12... solomonkurz.netlify.app/blog/2023-06...

“…the net worth of the 10 richest US billionaires grew by $698bn in the past year. That money alone, the increment in the wealth of 10 people, is almost 10 times the annual amount required to end extreme poverty worldwide.” www.theguardian.com/commentisfre...

Meta earns $3.5 billion every six months from showing Faceboon and Instagram users 15 billion “higher legal risk” scam ad impressions a day, internal documents state. That haul vastly exceeds how much the company expects regulators To fine it for running scam ads. www.reuters.com/investigatio...

Waiting for a new work Mac, I’m using an M1 Air 2020 which only has 4 high performance cores. Running some tests in R, the Air is twice as fast when using only 4 cores compared to using 8 cores (including the high efficiency cores).

I was just notified of another paper citing our paper as validating the Swedish PSS-4, when we actually conclude that it should not be used. What was even more surprising was that one of my coauthors on the psychometrics paper was also a coauthor on the paper. Not sure what to do with this.

AI has an "emperor has no clothes" problem where people imagine there are geniuses who will inevitably achieve breakthroughs with enough cash. AI is bottlenecked by limits in data availability, statistical mechanics, & computing. Improvements will be expensive & incremental, not fundamental.

Forced to deal with Microsoft Outlook/etc at work, I constantly find the default settings to be annoying/stupid. I wonder if they ever gather data to understand user preferences or just make assumptions. Or am I the outlier?

I'm now also looking for a postdoc with strong Bayesian background and interest in developing Bayesian cross-validation theory, methods and software. Apply by email with no specific deadline (see contact information at users.aalto.fi/~ave/). Others, please share

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

🎉 @rpsychologist.com 's PowerLMM.js is the online statistics application of the year 2025 🎉 powerlmmjs.rpsychologist.com - Calculate power (etc) for multilevel models - Examine effects of dropout and other important parameters - Fast! (Instant results)

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?

I've done some more work on the relative measurement uncertainty, comparing `brms` posterior draws to "plausible values" in Rasch models, and some other reliability metrics. Estimating RMU from draws adds some variation, as shown in the figure. pgmj.github.io/reliability.... #rstats #psychometrics

Anthony Biglan's "The Nurture Effect" shines a light on how we can intentionally design better societies. It's about building upstream prevention and fostering nurturing environments. What are your thoughts? snapt.io/CUHnJ #SocialScience #CommunityDevelopment #Prevention Image: Vectzeey

Largest study of its kind shows AI assistants misrepresent news content 45% of the time – regardless of language or territory. www.bbc.co.uk/mediacentre/...

this tweet turns 10 today 🎂🥳

Against Publishing: universonline.nl/nieuws/2025/... Preprints are read, shared, and cited, yet still dismissed as incomplete until blessed by a publisher. I argue that the true measure of scholarship lies in open exchange, not in the industry’s gatekeeping of what counts as published.

Very useful extension! I used an earlier version in this paper: pgmj.github.io/rasch_itemfit/