iiinova — where your digital self keeps evolving

Magnus Johansson @pgmj.bsky.social · 05/10/2026

Got a review with about 10 pages of feedback, which also has a very distinct LLM vibe. It does raise relevant things of various dignity throughout though.

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Magnus Johansson @pgmj.bsky.social · 04/10/2026

Har du en länk till studien?

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Magnus Johansson @pgmj.bsky.social · 02/10/2026

Thanks for reminding me of that. Very nice book, The Diamond Age.

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Tomas Formo Langkaas @tflangkaas.bsky.social · 29/09/2026

“Whether idionomically guided treatment does better is itself a causal question about groups, answerable by randomizing patients to idionomically guided or standard treatment.” Well put. (Keep reading “idiotically” though)

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Ian Hussey @ianhussey.mmmdata.io · 29/09/2026

Hayes has been banging this drum about idionomic analyses for 6+ years, with folk like @jamiecummins.bsky.social pointing out that its reinventing-the-wheel-but-worse for just as long. My experience is that the ACT community is insufficiently interested and aware of existing methods+stats work.

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Magnus Johansson @pgmj.bsky.social · 28/09/2026

Our commentary "A Revolution in Search of an Estimand: On the Idionomic Proposal of Hayes et al. (2026)" is now available as a preprint: osf.io/preprints/ps... With @rpsychologist.com, @matti.vuorre.com, and Nils Hentati Isacsson.

osf.io

OSF

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Magnus Johansson @pgmj.bsky.social · 25/09/2026

They report these summary stats in the Supplementary, and there is no discussion of this in the paper at all. And this is in a fairly prominent journal in the field.

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Magnus Johansson @pgmj.bsky.social · 25/09/2026

We just published a meta-analysis, where one finding is that "number of sickdays" is a bounded, not seldom zero/one-inflated variable, which is unsuitable for meta-analysis based on mean/SD. Today, I came across a meta-analysis including sickday stats like mean=9 and SD=27. doi.org/10.1186/s403...

doi.org

Client Challenge

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Magnus Johansson @pgmj.bsky.social · 24/09/2026

Both figshare and zenodo will archive your github repos with a DOI.

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Magnus Johansson @pgmj.bsky.social · 24/09/2026

This is worth reposting once in a while. bsky.app/profile/rpsy...

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Canadian Paintings @canadianpaintings.bsky.social · 23/09/2026

Rounding the Horn Terry Watkinson 2020

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Magnus Johansson @pgmj.bsky.social · 23/09/2026

Version 3.2.2 of my jamovi module for #Rasch #psychometrics is now available. It brings conditional reliability, a Reliable Change Index with exact critical values, and a new targeting figure. The module uses #rstats pkg easyRasch2 v1.3.1 and produces identical results. pgmj.github.io/easyRasch2/

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Magnus Johansson @pgmj.bsky.social · 22/09/2026

I agree. The RMU (relative measurement uncertainty) code is implemented in my R packages easyRasch2 and easyRaschBayes.

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Magnus Johansson @pgmj.bsky.social · 22/09/2026

I’ll send you a draft tomorrow. Sharing is not common, no. Neither are simulation studies… This paper has open data, using boruta. Played with it some years ago. Pearson correlation selected the same top 7 features/variables as boruta. www.sciencedirect.com/science/arti...

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Magnus Johansson @pgmj.bsky.social · 20/09/2026

Makina 67 (orange filter) Rollei RPX400@800

Black and white photo of a sunlit oak tree.

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Magnus Johansson @pgmj.bsky.social · 17/09/2026

In practice, I recall reading somewhere (stan forums?) that you can add rows with fake responses in the empty categories and give them zero weight to get brms to estimate the intercepts.

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Magnus Johansson @pgmj.bsky.social · 17/09/2026

IMHO, this needs a qualitative perspective as well. Supposing that your scale had actual labels before coded as integers, are those labels meaningfully distinct (or similar), when interpreted together with the item/question?

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Nicolas Hénin @nicolashenin.net · 17/09/2026

Nice campaign by the Norwegian Consumer Council about the declining lifespan of products. Enjoy!

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Magnus Johansson @pgmj.bsky.social · 17/09/2026

An automated check would be so easy and cheap to implement.

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Magnus Johansson @pgmj.bsky.social · 16/09/2026

Screenshot text from www.sciencedirect.com/journal/clin...

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Magnus Johansson @pgmj.bsky.social · 15/09/2026

Nice! Love a title that communicates well :) Anyone with the fulltext PDF of that paper, I can't find it anywhere? Please email pgmj@pm.me

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Wes Bonifay @wesbonifay.bsky.social · 15/09/2026

It's right there in the title europepmc.org/article/med/...

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Magnus Johansson @pgmj.bsky.social · 15/09/2026

Raine, et al. (2015). Reduction in behavior problems with omega-3 supplementation in children aged 8-16 years: A randomized, double-blind, placebo-controlled, stratified, parallel-group trial. doi.org/10.1111/jcpp...

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Magnus Johansson @pgmj.bsky.social · 15/09/2026

If you want to expand your scope on fatty acids, this could be interesting to look into as well: Johnson, et al. (2016). Omega 3/6 fatty acids for reading in children: A randomized, double-blind, placebo-controlled trial in 9-year-old mainstream schoolchildren in Sweden. doi.org/10.1111/jcpp...

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Magnus Johansson @pgmj.bsky.social · 15/09/2026

It only recently became apparent to me that some psychologists publish "method development" in applied journals, which means reviewers are not properly equipped. Looking at the where this group has published on this topic before makes the pattern clear in this case at least. Why did CPR invite this?

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Robert (Bob) Kubinec @rmkubinec.bsky.social · 15/09/2026

I see this comment a lot: I shouldn't use Bayesian models without a good reason. Frequentist packages (maximum likelihood, etc) are a special case of Bayesian analysis. Bayes can do *any* MLE model plus a lot more. So the question is, what is your justification for restricting yourself to MLE?

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Magnus Johansson @pgmj.bsky.social · 14/09/2026

Sounds like an interesting journey. Wanna join? :)

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Magnus Johansson @pgmj.bsky.social · 14/09/2026

Let's say I scrambled together a comment/critique of this paper. Any suggestions on journal that I should submit it to?

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Magnus Johansson @pgmj.bsky.social · 14/09/2026

Interesting timing. I just noticed this paper: Hayes, S. C., Ciarrochi, J., Sahdra, B. K., Hofmann, S. G., Ong, C. W., & Hernández, C. (2026). One size fits none: A call for an idionomic revolution. Clinical Psychology Review, 129, 102800. doi.org/10.1016/j.cp...

doi.org

Redirecting

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Ade Taylor (shoot_dev_print_repeat) on instagram @ade-pano.bsky.social · 12/09/2026

Pano triple Saturday Hasselblad Xpan ii Ilford FP4

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Solomon Kurz @solomonkurz.bsky.social · 04/07/2026

At a basic level, I think this depends on what you care about. If you want quick pubs for a grade or a promotion, just do t-tests. If you are interested in your data, learn how to fit and interpret ordinal models.

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Magnus Johansson @pgmj.bsky.social · 09/09/2026

... transforming heuristic findings based on a very limited sample of misspecified models into golden rules of fit that are broadly applied without the cautions recommended by Hu and Bentler (1999)."

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Magnus Johansson @pgmj.bsky.social · 09/09/2026

If that was unclear, the purpose of Marsh's paper is advocating against rule-of-thumb cutoffs: "we strongly encourage researchers, textbook authors, reviewers, and journal editors not to overgeneralize the Hu and Bentler (1998, 1999) results, ...

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Magnus Johansson @pgmj.bsky.social · 09/09/2026

Curiously, I again encountered a CFA paper that refers to Marsh et al 2004 to justify rule-of-thumb cutoffs to interpret model fit. Marsh's title is "Comment on hypothesis-testing approaches to setting cutoff values for fit indexes and dangers in overgeneralizing Hu and Bentler’s (1999) findings"

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Magnus Johansson @pgmj.bsky.social · 07/09/2026

It can be really useful for second opinions on methods/analysis/results writing. Especially when working alone :) But you need a competent model like Claude Opus/Fable

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Vincent Arel-Bundock @vincentab.bsky.social · 04/09/2026

Big news! 🎉 𝚖𝚊𝚛𝚐𝚒𝚗𝚊𝚕𝚎𝚏𝚏𝚎𝚌𝚝𝚜 1.0.0 for #Rstats is out. It’s a big number and it feels like a big step. I wrote a blog on the challenges of interpreting statistical models, SPEED, cool new features, the future, and a 5 year package development and writing odyssey. arelbundock.com/posts/margin...

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Aki Vehtari @avehtari.bsky.social · 26/08/2026

New ppc_calibration() plots for posterior predictive calibration checks for binary outcome models. Previously we advocated a bootstrap variant. Now new posterior and loo variants by @teemusailynoja.bsky.social and @florencebockting.bsky.social as described in teemusailynoja.github.io/visual-predi...

bayesplot::ppc_calibration() plots for Negative-binomial and Zero-inflated negative binomial models

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MC Stan @mc-stan.org · 18/08/2026

There is now StanCon 2026 Uppsala playlist www.youtube.com/playlist?lis... At the moment talks by @mjskay.com, @aseyboldt.bsky.social, @paulbuerkner.com, @charlesm993.bsky.social are up, and we'll keep uploading more during the week

youtube.com

StanCon 2026 Uppsala - YouTube

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Ian Hussey @ianhussey.mmmdata.io · 14/08/2026

I’ve been told for years that it’s legally and ethically impossible to share medical RCT data. In 2024, the BMJ made sharing anonymised data mandatory, and now lots* of folk do it. Interesting how the barriers evaporated like that, isn’t it? *not everyone, compliance problems exist.

medrxiv.org

Availability of clinical trial individual patient data in the BMJ before and after adoption of a stringent data-sharing policy, compared with recent rates at other major medical journals

Background In 2024, the BMJ updated its data-sharing policy for clinical trials, requiring open deposit of deidentified individual participant data (IPD) before publication. We considered whether data...

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Magnus Johansson @pgmj.bsky.social · 10/08/2026

Helpful cat also likes the vertical mouse.

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