Louise B. Bjerrum

New job appreciation post pt.2: this week, I've spent most of my time learning Shiny in R💻 I'm having a great time🤩

Happy logical Halloween

That was certainly not the case as a PhD student at the University.

One week into my new role as an advisor/consultant in data analysis and statistics at the Center of expertise in medical quality registries in the Western Regional Health Authority (Norway). It's quite deliberating the fact that I'm mentally "done" with work when I leave the office around 4PM.

After “fast food”
And “fast fashion”

Have we entered the era of “fast science”?

Whoa—my book is up for pre-order!

𝐌𝐨𝐝𝐞𝐥 𝐭𝐨 𝐌𝐞𝐚𝐧𝐢𝐧𝐠: 𝐇𝐨𝐰 𝐭𝐨 𝐈𝐧𝐭𝐞𝐫𝐩𝐫𝐞𝐭 𝐒𝐭𝐚𝐭 & 𝐌𝐋 𝐌𝐨𝐝𝐞𝐥𝐬 𝐢𝐧 #Rstats 𝐚𝐧𝐝 #PyData

The book presents an ultra-simple and powerful workflow to make sense of ± any model you fit

The web version will stay free forever and my proceeds go to charity.

tinyurl.com/4fk56fc8

PhD thesis related pt.2: procrastination continues. Taking a theoretical deep dive into beta regression rather than writing about circadian entrainment in the Introduction section💁‍♀️ Hopefully, I will get the chance to discuss statistics/quant.methods during the defense🤞

PhD thesis related: SO much more fun discussing and criticizing (own) methods rather than working on the Introduction. I guess this is how procrastination manifests. Could have been worse, I could have started making some random R figures for instance💁‍♀️

Capturing trial-by-trial variability in behaviour: people with Parkinson’s disease exhibit a greater rate of short-term fluctuations in response times - Translational Psychiatry Translational Psychiatry - Capturing trial-by-trial variability in behaviour: people with Parkinson’s disease exhibit a greater rate of short-term fluctuations in response times

Working on the discussion section of the PhD thesis, where I (among other things) discuss ways of estimating intra-individual RT variability. This paper recently came out, featuring one of my co-supervisors: www.nature.com/articles/s41... Graph theory looks like an interesting estimation approach🤓

Sunday with my little man☕️

An arrow with a LaTeX equation

Trigonometric functions and a unit circle

A bivariate change model with structured residuals

A hierarchical model of cognitive abilities

Now on CRAN, ggdiagram is a #ggplot2 extension that draws diagrams programmatically in #Rstats. Allows for precise control in how objects, labels, and equations are placed in relation to each other.
wjschne.github.io/ggdiagram/ar...

Not sure how little ole me got @rmkubinec.bsky.social, @chelseaparlett.bsky.social and @matti.vuorre.com to write a thing with me, but it happened! We wrote a Beta tutorial showcasing Beta and extensions of Beta (like ordered Beta). A preprint is available here: osf.io/preprints/ps....

Reevaluating the role of education on cognitive decline and brain aging in longitudinal cohorts across 33 Western countries - Nature Medicine In a large cross-national study, education was linked to better memory and larger brain volumes but not to slower cognitive or brain decline with age, suggesting that the association reflects early-li...

New study out in Nature Medicine: Education does not protect against age-related decline of memory. Read more here: Reevaluating the role of education on cognitive decline and brain aging in longitudinal cohorts across 33 Western countries www.nature.com/articles/s41...

What’s in a correlation? Correlation may not imply causation, but let’s just ignore that for a second. Correlations are standardized effect size metrics and as such have some quirks by design. These are benign enough when you...

New blog post! Calculating a correlation is easy enough. But let's say you calculated two of them and they happen to differ. What follows from that? Turns out there are too many moving parts for an easy answer.

www.the100.ci/2025/07/28/w...

make_tile() works as a charm, however, I can't get snap_tile() to work properly. Should the path specified in output_path() have another format than usual?😅 I'm using Windows, so my path would be something like "C://User//folder//subfolder//temp_hexsession//example_hexout.html""

Create a tile of logos for loaded packages Creates a responsive HTML file with tiled hex logos for all loaded packages in a session, which can be saved as a static screenshot in png format.

Want to visualize the R packages you have used in an analysis, e.g. for a presentation of research results? Recently came across the {hexsession} package made by @liomys.mx, so easy to use and the output looks great hexsession.liomys.mx

I cannot be convinced there exists a better title than "ItJustAintDopeToDropTheSlope.pdf" (which is how the .pdf on OSF is called).

Experimentology cover: title and curves for distributions.

Experimentology is out today!!! A group of us wrote a free online textbook for experimental methods, available at experimentology.io - the idea was to integrate open science into all aspects of the experimental workflow from planning to design, analysis, and writing.

"Simpson's gender-equality paradox" surely deserve some award for best title 👑
The gender-equality paradox seems really central to some narrative people have constructed (and successfully sold). I absolutely wouldn't be surprised if it turned out 100% confounding.>

www.pnas.org/doi/10.1073/...

2/2 So, the revised manuscript now includes more statistically sound models. The more you know✅ Thanks @mattansb.bsky.social, for valuable input on how we could construct these new models🤓

1/2 Updated preprint with revised manuscript following peer review📝 We got a lot of constructive feedback, e.g., on statistical analyses. Turned out, we had not accounted for random effects associated with all of the within-subjects variables included in the models.

True story

One of the reasons why I like living in Bergen (NO)✨️

So it begins: writing the PhD dissertation💡🤓

Kombucha girl maybe meme. On the left, frowny face: working on an important manuscript On the right, intrigued: spending two hours to create a figure that came to my mind quite randomly

Disentangling sources of variability in decision-making - Nature Reviews Neuroscience Identifying the psychological and neurobiological processes underpinning intra-individual variations in choice behaviour presents a formidable challenge. In this Review, Duffy et al. discuss how algor...

In life, 3 things are certain: death, taxes, and decision-making variability🧠. Our review tinyurl.com/4dcwafc4 explores how computational models 💻 explain variability, their limits, and recent advances. A thread🧵👇

@redmondoconnell.bsky.social @neuromurphy.bsky.social Mark Bellgrove (not on Bluesky)

A new version of {modelbased} just hit CRAN, including bug fixes and many new features. modelbased let's you easily compute marginal means, contrasts and pairwise comparisons, and marginal effects (slopes). Find a lot of examples and vignettes online at: easystats.github.io/modelbased/

Happy international women's day!✨️🥳

In a few weeks I’ll be giving a 2-day workshop on the interpretation of statistical models in #Rstats. We’ll be talking a lot about the {marginaleffects} 📦.

I ❤️ teaching that class! The participants are super fun and our conversations are always interesting.

Let me know if you have any questions!