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Ewan Carr

@ewancarr.bsky.social

180 followers 150 following 12 posts

Reader in Biostatistics, Biostatistics and Health Informatics, King’s College London. He/him.

Videos

Psychology 55%

Public Health 26%

Posts Media Videos Starter Packs

Reposted by Magnus Johansson, Ewan Carr, Paul Goldsmith-Pinkham , and 1 more Magnus Johansson, Ewan Carr, Paul Goldsmith-Pinkham, Barrett

Emil Hvitfeldt @emilhvitfeldt.bsky.social · 15d

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 Dorothy Bishop, Richard McElreath, Ewan Carr , and 3 more Dorothy Bishop, Richard McElreath, Ewan Carr, Michael G. Bertram, Matthew J. Silk, Jill A. Jacobson

Joel Pick @joelpick.bsky.social · 25d

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

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Reposted by Michael Barnett, Dorothy Bishop, Ben Bond‐Lamberty , and 10 more Michael Barnett, Dorothy Bishop, Ben Bond‐Lamberty, Simon Roux, Pierre Bataille, Trevor A. Branch, Ewan Carr, Barrett, Brian Weatherson, Wolfgang Huber, Anton Grau Larsen, Juan Ramón, Baptiste Coulmont

Thomas Lin Pedersen @thomasp85.com · 29d

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 Richard McElreath, Ewan Carr

LMU Open Science Center @lmu-osc.bsky.social · Sep 10

💡 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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Ewan Carr @ewancarr.bsky.social · Sep 5

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 Anja Leist, Naomi Priest, Ewan Carr

hjhansford.bsky.social @hjhansford.bsky.social · Sep 3

🎯 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

travis gerke @travisgerke.bsky.social · Aug 20

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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Reposted by Ewan Carr

Ian Hussey @ianhussey.mmmdata.io · Aug 18

{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

Nan van Geloven @gelovennan.bsky.social · Aug 11

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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Ewan Carr @ewancarr.bsky.social · Jul 24

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

Frank Harrell @f2harrell.bsky.social · Jul 24

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 Diane Coyle, Dorothy Bishop, David Higgins , and 5 more Diane Coyle, Dorothy Bishop, David Higgins, Ewan Carr, Holger Nehring, Keith Lilley, Catriona Seth, Judith Jesch

Hetan Shah @hetanshah.bsky.social · Jul 23

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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Ewan Carr @ewancarr.bsky.social · Jul 18

A helpful framework for evaluating software dependencies:

Ubiquity
Stability
Depth
Ergonomics
Watertightness

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

Dirk Eddelbuettel @eddelbuettel.com · Jul 18

NIH Is Far Cheaper Than The Wrong Dependency

Frivilous dependencies are the enemy of maintainability.

lewiscampbell.tech

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Reposted by Ewan Carr, Madeleine Pownall

RoSE Network @rosenetwork.bsky.social · Jul 14

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

Charlie Gao @shikokuchuo.net · Jul 10

#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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Reposted by Uta Frith, Brian A. Nosek, Martín Haspelmath , and 9 more Uta Frith, Brian A. Nosek, Martín Haspelmath, Paul E. Smaldino, Martin Lang, Magnus Johansson, Ingo Rohlfing, Ewan Carr, Andrew Livingstone, Vinayak Sinha, Terry Gaasterland, Andreas Haupt

Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · Jul 9

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 Richard S.J. Tol, Justin H. Kirkland, Ewan Carr , and 1 more Richard S.J. Tol, Justin H. Kirkland, Ewan Carr, Christopher Zorn

Vincent Arel-Bundock @vincentab.bsky.social · Jul 3

{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 Ewan Carr, Matt N Williams, Jill A. Jacobson, Andrew Baillie

Julia M. Rohrer @dingdingpeng.the100.ci · Jun 25

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

Julia Evans @b0rk.jvns.ca · Jun 24

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

Damien C-C @dccc-phd.bsky.social · Jun 24

YYYY-MM-DD OR NOTHING AT ALL

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Reposted by Ewan Carr, Barrett

Charlie Gao @shikokuchuo.net · Jun 13

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 @andrew.heiss.phd · May 29

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 @jonathan-bartlett.bsky.social · May 13

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 Rafael H. M. Pereira, Peter Campbell, Mauricio Romero , and 2 more Rafael H. M. Pereira, Peter Campbell, Mauricio Romero, Ewan Carr, Urška Demšar

Andrew Heiss @andrew.heiss.phd · May 8

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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Reposted by Ewan Carr

Marion Campbell @marionkcampbell.bsky.social · May 5

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

Casual Inference Podcast @casualinfer.bsky.social · Apr 25

🎙️ 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

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Reposted by Ewan Carr, Andrew Bell

Essex Summer School in Social Science Data Analysis @essexsummerschool.bsky.social · Apr 11

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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Reposted by Ewan Carr

Maarten van Smeden @maartenvsmeden.bsky.social · Mar 24

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 Robert Böhm, Olivier Klein, Kai Sassenberg , and 1 more Robert Böhm, Olivier Klein, Kai Sassenberg, Ewan Carr

Julia M. Rohrer @dingdingpeng.the100.ci · Mar 20

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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