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Ewan Carr

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H-index: 23
Psychology 55%
Public Health 26%
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Reposted by: Ewan Carr, Magnus Johansson, Paul Goldsmith-Pinkham , and 1 more

emilhvitfeldt.bsky.social
I'm exited to announce a new resource about making slides with quarto and revealjs. This book is the combination of all the work I have done in this area, reordered and polished up

There isn't a lot of new information yet, but this format allows me to add more easily

slidecrafting-book.com
#quarto
Screenshot of first page of slidecrafting-book.com website
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Reposted by: Ewan Carr, Dorothy Bishop, Richard McElreath , and 3 more

joelpick.bsky.social
Interested in simulating the kind of data that you might commonly find in evolutionary and ecological studies?

Then we have the R package for you - squidSim!!

Check our new preprint:
ecoevorxiv.org/repository/v...
squidSim: a flexible R package for structured and reproducible simulations in Ecology and Evolutionary Biology
ecoevorxiv.org
2 34 66

Reposted by: Ewan Carr, Michael Barnett, Dorothy Bishop , and 10 more

thomasp85.com
I am beyond excited to announce that ggplot2 4.0.0 has just landed on CRAN.

It's not every day we have a new major #ggplot2 release but it is a fitting 18 year birthday present for the package.

Get an overview of the release in this blog post and be on the lookout for more in-depth posts #rstats
ggplot2 4.0.0
A new major version of ggplot2 has been released on CRAN. Find out what is new here.
www.tidyverse.org
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Reposted by: Ewan Carr, Richard McElreath

lmu-osc.bsky.social
💡 Explore how practices from distributed, open-source software can make science more professional, open, and collaborative! Attend the “Science as amateur software development” lecture by Prof. Dr. @rmcelreath.bsky.social on Wed 17 Sept, 9:00.
👉 Register here: www.pretix.osc.lmu.de/lmu-osc/OSSS...
Promotional poster for the LMU Open Science Center Summer School 2025 Public Lecture. The poster features a photo of speaker Prof. Dr. Richard McElreath. The text states the lecture focuses on science as amateur software development, time and date of lecture being 9:00-10:00 CEST on Wednesday September 17 2025, and instructions to register online. Logos of LMU Open Science Center, LMU, and Universitätsbibliothek München are displayed at the bottom.
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by Ewan Carr

ewancarr.bsky.social
Hi, we wrote about this a few years ago:

www.sciencedirect.com/science/arti...

Essentially, we were interested in mediator-outcome overlap and what that meant for the interpretation of mediational hypotheses.

We had a poster, too:
A conference poster with the title "Is your mediator an outcome in disguise?" and the subheading "We made a tool to check".
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Reposted by: Ewan Carr, Anja Leist, Naomi Priest

hjhansford.bsky.social
🎯 TARGET Guideline published 🎉

TARGET is a reporting guideline for observational studies of interventions that use the target trial framework.

Over 3 years the @TARGETGuideline was rigorously developed and was co-published today in @jama.com & @bmj.com

doi.org/10.1001/jama.2025.13350

#episky
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Reposted by: Ewan Carr

travisgerke.bsky.social
This is extremely cool. Picked it up and made this DAG in like 15 minutes. Obviously pros/cons versus other DAG tools (e.g. low/no code cstructure and R's ggdag, both of which offer d-separation details and more) but if you have rigid aesthetic requirements this is a great tool to have in your kit
a DAG representing selection bias produced with ggdiagram
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by Ian Hussey — Reposted by: Ewan Carr

ianhussey.mmmdata.io
{truffle} is an R package for teaching users to process data.

Semi-realistic psychological datasets with predetermined effects (via `truffles_` functions) are then hidden in common data processing headaches (via `dirt_` functions) for students to clean and analyze.

mmmdata.io/posts/2025/0...
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Reposted by: Ewan Carr

gelovennan.bsky.social
New paper in @annalsofim.bsky.social

"50 ways to misinterpret clinical prediction models for treatment decisions”

--> Published version: www.acpjournals.org/doi/10.7326/...

--> Open access version: arxiv.org/pdf/2402.17366
The Risks of Risk Assessment: Causal Blind Spots When Using Prediction Models for Treatment Decisions | Annals of Internal Medicine
Clinicians increasingly rely on prediction models to guide treatment choices. Most prediction models, however, are developed using observational data that include some patients who have already receiv...
www.acpjournals.org
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by Ewan Carr

ewancarr.bsky.social
Running a workshop tomorrow on reproducible workflows in R at the King's Open Research Summer School.

📽️ Slides: ewancarr.github.io/reproducible-r
👩‍💻 Practical: ewancarr.github.io/reproducible-r/practical

Mildly terrified that Git on Windows will be my downfall—but we'll see. 😅

#rstats #opensci
Reproducible workflows in R
ewancarr.github.io
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Reposted by: Ewan Carr

f2harrell.bsky.social
New blog article on Statistical Thinking: confidence limits for bootstrap overfitting-corrected predictive performance measures for regression models, useful for strong internal validations including confidence bands for debiased calibration curves: fharrell.com/post/bootcal #statistics #StatsSky
fharrell.com
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Reposted by: Ewan Carr, Diane Coyle, Dorothy Bishop , and 5 more

hetanshah.bsky.social
We are offering up to £10k for researchers to upgrade their skills - e.g. in AI/machine learning; or a language; or something else! Think about it over the summer and apply by early October
www.thebritishacademy.ac.uk/funding/tale...
Talent Development Awards 2025-26
The Talent Development Awards are available to promote the acquisition and advancement of skills in relevant areas by UK-based researchers, promoting innovative research methods, be that through skill...
www.thebritishacademy.ac.uk
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by Ewan Carr

ewancarr.bsky.social
A helpful framework for evaluating software dependencies:

Ubiquity
Stability
Depth
Ergonomics
Watertightness
eddelbuettel.com
Dirk Eddelbuettel @eddelbuettel.com · Jul 18
"One of the biggest fallacies in coding is that dependencies have zero downsides."

Best opening line in a while, more at the full post the link below. #rstats #tinyverse

lewiscampbell.tech/blog/250718....
NIH Is Far Cheaper Than The Wrong Dependency
Frivilous dependencies are the enemy of maintainability.
lewiscampbell.tech

Reposted by: Ewan Carr

eddelbuettel.com
"One of the biggest fallacies in coding is that dependencies have zero downsides."

Best opening line in a while, more at the full post the link below. #rstats #tinyverse

lewiscampbell.tech/blog/250718....
NIH Is Far Cheaper Than The Wrong Dependency
Frivilous dependencies are the enemy of maintainability.
lewiscampbell.tech
1 13

Reposted by: Ewan Carr, Madeleine Pownall

rosenetwork.bsky.social
Do you teach statistics, or do you conduct research about teaching statistics? The RoSE e-Conference on July 31st has sessions for you! Join our Statistics Pedagogy special interest group talks by registering for free here: bit.ly/roseconferen... #StatsEd #statistics #conferences
RoSE's 2025 e-Conference Special Interest Group Talks: - Presenting the Yet Another Conceptual Understanding of Statistics Assessment (YACUSA) - Statistics across the Curriculum: Integrating Applied Analytics in to Large General Education Courses - Enhancing Statistics Learning Through Mindfulness
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Reposted by: Ewan Carr, Barrett, Werner Krause

shikokuchuo.net
#tidyverse purrr 1.1.0 is out - now with parallel processing!

Scale your #rstats map operations reliably and efficiently across multiple cores and even distributed systems.

Powered by the mirai framework, this unlocks new levels of performance.

Read more at:
www.tidyverse.org/blog/2025/07...
Parallel processing in purrr 1.1.0
The functional programming toolkit for R gains new capabilities for parallel processing and distributed computing using mirai.
www.tidyverse.org
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by Richard McElreath — Reposted by: Ewan Carr, Uta Frith, Brian A. Nosek , and 10 more

rmcelreath.bsky.social
How can we reform science? I have some ideas. But I am not sure you’ll like them, because they don’t promise much. elevanth.org/blog/2025/07...
Which Kind of Science Reform
What hope is there for science reform, if we can't agree on what to reform? Right now, principles are more important than practices.
elevanth.org
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Reposted by: Ewan Carr, Richard S.J. Tol, Justin H. Kirkland , and 1 more

vincentab.bsky.social
{tinytable} is a dead simple, ultra-flexible, and dependency-free #Rstats 📦 to turn data frames into beautiful tables: html, word, pdf, latex, typst, markdown, etc.

v0.10.0 has cool new features and important bug fixes. Check out the detailed tutorials at:

vincentarelbundock.github.io/tinytable/
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Reposted by: Ewan Carr, Matt N Williams, Jill A. Jacobson , and 1 more

dingdingpeng.the100.ci
New blog post! Let's say you've measured two variables repeatedly and want to investigate how one affects the other over time. Here are some recommendations for how to do that well.

www.the100.ci/2025/06/25/r...
Reviewer notes: So you’re interested in “lagged effects.”
In some fields, researchers who end up with time series of two variables of interest (X and Y) like to analyze (reciprocal) lagged effects between them. Does X affect Y at a later point in time, and d...
www.the100.ci
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Reposted by: Ewan Carr, Barrett

b0rk.jvns.ca
delighted to announce that my new zine "The Secret Rules of the Terminal" is out today!!

You can get it for $12 USD here: wizardzines.com/zines/terminal
The Secret Rules of the Terminal, by Julia Evans - The cover illustration depicts three people doing arcane terminal magic in a temple with a smoking censer in the background. Each of the three people has curly brown hair and light brown skin. They are all wearing dresses, billowing cloaks, and utility belts with keyboard symbols on them. The one on the left holds a palette of paints and a brush. The one on the right has a staff with a $ symbol on it and a starfish at the top. The one in the centre has a sword and is reading from a book whose cover says “>_” and “./”, which rests on a lectern with a smiling snake wrapped around it.
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Reposted by: Ewan Carr

dccc-phd.bsky.social
YYYY-MM-DD OR NOTHING AT ALL
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Reposted by: Ewan Carr, Barrett

shikokuchuo.net
Bleeding edge update for the #tidyverse purrr package with even more seamless #rstats parallel maps.

Introducing our shiniest new adverb: `in_parallel()`. Just wrap your function to take advantage of blazing fast parallel processing via mirai.

pak::pak("tidyverse/purrr")

purrr.tidyverse.org/dev/
Functional Programming Tools
A complete and consistent functional programming toolkit for R.
purrr.tidyverse.org
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Reposted by: Ewan Carr

andrew.heiss.phd
I'm on a podcast! I had a blast talking with @lucystats.bsky.social and @epiellie.bsky.social on @casualinfer.bsky.social! We cover all sorts of fun things: {marginaleffects}, defining estimands, fixed vs. random effects, & how to teach all this stats stuff in accessible ways #databs #EpiSky #rstats
Casual Inference: The Art of Clarity with Andrew Heiss | Season 6 Episode 6
Andrew Heiss is an assistant professor in the Department of Public Management and Policy at the Andrew Young School of Policy Studies at Georgia State University. Vincent’s “What is your estimand” s...
casualinfer.libsyn.com
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Reposted by: Ewan Carr

jonathan-bartlett.bsky.social
Join us on 10th June (online or in London @lshtm-dash.bsky.social ) to hear from Matthew Sperrin talk about his work on 'Prediction under intervention: challenges and trade-offs'.More details at www.lshtm.ac.uk/newsevents/e...
Prediction under intervention: challenges and trade-offs | LSHTM
Causality and prediction are often two separate activities. In particular, prediction can be done in a way that is agnostic to underlying knowledge, mechanism or causal structure. However, it is very
www.lshtm.ac.uk
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Reposted by: Ewan Carr, Rafael H. M. Pereira, Peter Campbell , and 2 more

andrew.heiss.phd
On the verge of declaring defeat with chatgpt in my asynchronous online dataviz class. Something changed this semester compared to past ones and SO MANY assignments are essentially 100% LLM output.
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by Marion Campbell — Reposted by: Ewan Carr, Marion Campbell

marionkcampbell.bsky.social
This week saw the publication of SPIRIT 2025, a major update to the international SPIRIT Statement which provides guidance on what should be included in a trial protocol. 1/6
#MethodologyMonday #117
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Reposted by: Ewan Carr

casualinfer.bsky.social
🎙️ On this week’s episode @vincentab.bsky.social joins to chat with @epiellie.bsky.social & @lucystats.bsky.social about making statistical model output more meaningful via the {marginaleffects} package (and more!)

casualinfer.libsyn.com/site/from-mo...
Casual Inference: From Model to Meaning with Vincent Arel-Bundock | Season 6 Episode 4
Vincent Arel-Bundock is a professor at the Université de Montréal, where he studies comparative and international political economy. Vincent's website: Vincent's book "Model to Meaning: How ...
casualinfer.libsyn.com
1 9 45

Reposted by: Ewan Carr, Andrew Bell

essexsummerschool.bsky.social
Multilevel Models: Practical Applications

Curious about multilevel modelling but not sure where to start?

Learn to recognise, build & interpret multilevel models using MLwiN or R, through real-world examples & hands-on practice.

Find out more: bit.ly/3Yj5I4f

#ESS2025
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by Maarten van Smeden — Reposted by: Ewan Carr, Maarten van Smeden

maartenvsmeden.bsky.social
PROBAST+AI is out! A risk of bias tool for prediction models developed using any kind of analytical approach (stats/ml/ai/ds)

Really proud of this collaboration with many prediction model experts around the world

www.bmj.com/content/388/...
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Reposted by: Ewan Carr, Robert Böhm, Olivier Klein , and 1 more

dingdingpeng.the100.ci
New blog post! In which I explain the issue with mediation analysis and sketch out one way to deal with the underlying causal inference problem -- in just a bit over 1,000 words!

If you have never found the time to read up on this, now is your chance.

www.the100.ci/2025/03/20/r...
Reviewer notes: That’s a very nice mediation analysis you have there. It would be a shame if something happened to it.
Mediation analysis has gotten a lot of flak, including classic titles such as “Yes, but what’s the mechanism? (Don’t expect an easy answer)” (Bullock et al., 2010), “What mediation analysis can (not) ...
www.the100.ci
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