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Posts by Daniel Gerdesmann

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Download our free and open source Zotero Replication Checker plug in at forrt.org/flora_zotero. Check entire libraries or single reports, add replications and original studies, have them linked and labelled, and get regular updates - all with privacy-preserving matching.

3 days ago 11 7 1 1
The Foundation of Success for School, Work, and Life | Prof. Jeffrey D. Greene
The Foundation of Success for School, Work, and Life | Prof. Jeffrey D. Greene YouTube video by aim heilbronn

Here’s yours truly, giving a keynote address at the @leopoldina.org conference where I talked about self-regulation and its role in education and the modern world.

Such a pleasure and honor to speak with these leader educators.

youtu.be/slOFIPdLyb0

5 days ago 8 2 0 1
A vintage sepia-toned portrait photograph of Danish seismologist Inge Lehmann taken in 1932, at around age 44. She is posed formally against a softly draped curtain backdrop, gazing directly at the camera with a calm, intelligent, and composed expression. She has short, neatly waved dark hair and wears a simple, elegant dark blouse or dress with a light-colored V-neck insert or scarf tied loosely. The image captures her poised and thoughtful demeanor during the early years of her groundbreaking career in seismology, before her landmark discovery of Earth's solid inner core in 1936. #seismology #WomensHistoryMonth

A vintage sepia-toned portrait photograph of Danish seismologist Inge Lehmann taken in 1932, at around age 44. She is posed formally against a softly draped curtain backdrop, gazing directly at the camera with a calm, intelligent, and composed expression. She has short, neatly waved dark hair and wears a simple, elegant dark blouse or dress with a light-colored V-neck insert or scarf tied loosely. The image captures her poised and thoughtful demeanor during the early years of her groundbreaking career in seismology, before her landmark discovery of Earth's solid inner core in 1936. #seismology #WomensHistoryMonth

Educational diagram in exploded view showing the internal layers of the Earth. From left to right: a cutaway globe with blue surface and white continents labeled “CRUST,” followed by the thick brown mantle labeled “MANTLE,” the red outer core labeled “OUTER CORE,” and the small yellow inner core labeled “INNER CORE.” A complete blue globe with continents appears on the right for scale. All layers are separated horizontally to reveal the structure.

Educational diagram in exploded view showing the internal layers of the Earth. From left to right: a cutaway globe with blue surface and white continents labeled “CRUST,” followed by the thick brown mantle labeled “MANTLE,” the red outer core labeled “OUTER CORE,” and the small yellow inner core labeled “INNER CORE.” A complete blue globe with continents appears on the right for scale. All layers are separated horizontally to reveal the structure.

#OTD in 1936, Danish seismologist Inge Lehmann wrote a famous letter to a colleague outlining her theory that seismic waves (P-waves) recorded from distant earthquakes indicated Earth had a solid inner core.

Her discovery fundamentally changed our understanding of the Earth's interior. #WomenInSTEM

5 days ago 542 139 5 2
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If you use GitHub (especially if you pay for it!!) consider doing this *immediately*

Settings -> Privacy -> Disallow GitHub to train their models on your code.

GitHub opted *everyone* into training. No matter if you pay for the service (like I do). WTH

github.com/settings/cop...

1 week ago 2060 1509 93 136
Screenshot of the title page of an article published in the journal "Psychological Methods" titled "nmax and the Quest to Restore Caution, Integrity, and Practicality to the Sample Size Planning Process."

Screenshot of the title page of an article published in the journal "Psychological Methods" titled "nmax and the Quest to Restore Caution, Integrity, and Practicality to the Sample Size Planning Process."

Do you do quantitative psychological research? Do you need to conduct power analyses? Then you'd better read this article. doi.org/10.1037/met0... #PsychSciSky #AcademicSky #EduSky

1 week ago 35 10 0 0
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CodaNote: Collaborative Markdown/Quarto/Rmarkdown

People were looking for collaborating on MD family files with knit rendering...

I built this tool for CORE team, works like Google Docs.
Opened it to all from internal use so everyone can use it.

Feedback welcome!

Try:
codanote.vercel.app

1 week ago 49 19 10 2
Jarl 0.5.0

#rstats I'm glad to announce Jarl 0.5.0!

Jarl is a very fast R linter, written in Rust. This release brings many improvements and fixes.

See the blog post: www.etiennebacher.com/posts/2026-0...

And the full changelog: jarl.etiennebacher.com/changelog

🧵 to highlight some features below

(1/4)

1 week ago 59 13 1 2
Grassroots Efforts to Bring Open Science to the Field of Education Research | Crystal Lewis A brief history of efforts by various individuals, groups, and organizations to bring open science to the field of education and developmental science. Image from Open Social Work.

I've been coming across so many great open science initiatives in other fields that I wanted to take a moment to highlight some of the efforts happening in the Education Sciences.
New blog post! 💡

cghlewis.com/blog/ed_open...

1 week ago 26 12 1 0
Color close-up portrait photograph of American computer scientist and programming language pioneer Jean E. Sammet in her later years. She has short, wavy silver-gray hair, wears thin oval metal-rimmed eyeglasses, bright red lipstick, a royal blue blazer, and a patterned scarf at her neck. She smiles gently toward the viewer against a softly blurred green outdoor background.

Color close-up portrait photograph of American computer scientist and programming language pioneer Jean E. Sammet in her later years. She has short, wavy silver-gray hair, wears thin oval metal-rimmed eyeglasses, bright red lipstick, a royal blue blazer, and a patterned scarf at her neck. She smiles gently toward the viewer against a softly blurred green outdoor background.

Computer scientist Jean E. Sammet (b. #OTD in 1928):

+Developed the FORMAC programming language, 1962
+Co-developer, COBOL programming language
+1st female president, Assoc for Computing Machinery, 1974, world's largest educational & scientific computing society

#WomenInSTEM #computerscience #WHM

1 week ago 370 104 3 3
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We're #recruiting a research assistant to work on a DFG-funded project on #MetaScience at the University of Cologne. Some coding skills in #python required, and interest in modelling the #cognition of #reading! Please spread the word!

2 weeks ago 11 13 0 0
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POSTDOC OPENING! We are hiring a Postdoctoral Fellow for a mixed-methods project aimed at supporting and researching implementation of high-quality preschool curricula. The position is 1-2 years and can be in person or remote.

More details here: edpolicy.umich.edu/what-we-do/j...

2 weeks ago 14 18 0 0
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Acquiescence Bias and Criterion Validity: Problems and Potential Solutions for Agree-Disagree Scales - Political Behavior Political Behavior - Scholars frequently measure dispositions like populism, conspiracism, racism, and sexism by asking survey respondents whether they agree or disagree with statements...

@amengel.bsky.social and @scottclifford.bsky.social recently argued the opposite, because acquiescence bias can severely distort the relationships between constructs.
link.springer.com/article/10.1...

2 weeks ago 5 1 4 0
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Why reversed items can be problematic in survey research In quantitative psychological research, questionnaires with Likert-style items are mostly used to assess variables like emotions, cognitions, and dispositions. Sometimes, it is possible to fall bac…

🚨 New Blog Post 🚨

I wrote my very first blog post 😊

This post is for quantitative researchers working with negatively worded Likert-scale items and haven't heard that these items can cause problems. I outline key issues, describe alternatives, and recommend lit.

yannicmeier.de/2026/03/03/w...

1 month ago 33 12 1 2
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Open Education Group Post by @drclintonlisell.

The call for applications for open education research fellows is open! Fellow academics, please share, details are here: openedgroup.org #openeducation #oer

2 weeks ago 1 1 0 0
The Missile Knows Where It Is...
The Missile Knows Where It Is... YouTube video by Jeff7181

youtu.be/bZe5J8SVCYQ?...

A lot of more complex modeling and psychometrics reminds me of this video lol.

We know what the dimension is because of what it isn't!

2 weeks ago 2 1 1 0
Paul R. Ehrlich, Who Alarmed the World With ‘The Population Bomb,’ Dies at 93

His best-selling 1968 book, which forecast global famines, made him a leader of the environmental movement. But he faced criticism when his predictions proved premature.

Keith Schneider https://www.nytimes.com/2026/03/15/books/paul-r-ehrlich-dead.html

Paul R. Ehrlich, Who Alarmed the World With ‘The Population Bomb,’ Dies at 93 His best-selling 1968 book, which forecast global famines, made him a leader of the environmental movement. But he faced criticism when his predictions proved premature. Keith Schneider https://www.nytimes.com/2026/03/15/books/paul-r-ehrlich-dead.html

Cover of the Population Bomb

Cover of the Population Bomb

Paul Ehrlich has died. His 1968 book,The Population Bomb, is mostly remembered for predictions that didn't pan out.

But its influence on the radical environmental movement is underappreciated. A thread on Ehrlich's complicated legacy from my interviews with current and former eco-activists.

2 weeks ago 47 19 2 4

Marshall not only shared his own story, but also turned my childlike drawing from last year's conference into a real diagram of the long and winding road towards evidence use.

2 weeks ago 5 2 0 0
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Erik Spoelstra defends Bam's 83-pt game (via MikeCugnoCBS4/X, @CBSMiami)
Erik Spoelstra defends Bam's 83-pt game (via MikeCugnoCBS4/X, @CBSMiami) YouTube video by Bleacher Report

Me, after debunking learning styles and offering people a better way to differentiate instruction: youtube.com/shorts/e-BFj...

2 weeks ago 4 1 0 0
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a man looking out of a window with a caption that says lil bro trying to answer but question wasnt for him ALT: a man looking out of a window with a caption that says lil bro trying to answer but question wasnt for him

Me, just after pre-ordering Josh Starmer's latest Statistics book!

3 weeks ago 9 3 0 1

if anyone else has papers or projects that use rix, please let me know! in open source, people open issues to tell you when things don't work (which is fine) but sometimes, getting positive feedback is nice as well :D

3 weeks ago 10 4 2 0
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A Design-Based Intervention to Develop Elementary Students’ Digital Literacy Skills UNESCO identified the formation of digital literacy skills as one of the most desired outcomes of education. Using an exploratory sequential mixed methods design, we explored elementary students’ p...

I'm a fan of design-based research and how it is deeply situated and also collaborative with (in this case) teachers and students. Seems like digital literacy is shifting every month, now, so we need more research like this into what students are actually doing. #PsychSciSky #AcademicSky #EduSky

3 weeks ago 6 3 0 0
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How much does it pay to publish an open access academic book? Read this thread for my story and 💲💰 amounts. 🧵

www.routledge.com/9781032908724

3 weeks ago 132 28 8 0
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Think inside the box, part 1: The guy Euclidean distance told you not to worry about Romance could be so simple if only we were two-dimensional. You just find the closest available partner and go for it. To find out who is closest, you might compute a distance measure. The Euclidean d...

New post from me on The 100% CI. Think inside the box, part 1: The guy Euclidean distance told you not to worry about
www.the100.ci/2026/03/09/t...

3 weeks ago 41 11 6 3
Beyond Representation: Epistemic Justice in Science Education through the Historical Sciences and Indigenous Knowledge

New publication alert! "Beyond Representation: Epistemic Justice in Science Education through the Historical Sciences and Indigenous Knowledge" in Science & Education. Limited free copies here: rdcu.be/e7jPw

3 weeks ago 3 1 0 0
A Day in the Life of an Ensh*ttificator
A Day in the Life of an Ensh*ttificator YouTube video by Forbrukerrådet - Norwegian Consumer Council

The Norwegian Consumer Council with an amazing video on enshittification and how to resist it.

www.youtube.com/watch?v=T4Up...

3 weeks ago 110 47 4 13
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Baturday
Bat World Sanctuary

4 weeks ago 6888 1627 160 379
Screenshot of my username and handle. The domain is eurosky.social.

Screenshot of my username and handle. The domain is eurosky.social.

😎🇪🇺

4 weeks ago 7 1 0 0
Chapter 6 Chapter 5: Assessing Model Quality | Chapter 5: Assessing Model Quality - Does Our Model Make Sense? My notes for the advanced cognitive modeling course - 2026

my course notes on a bayesian workflow for (single agent) cognitive modeling are now fully revised and online: fusaroli.github.io/AdvancedCogn...

Predictive checks, updating checks, sensitivity analyses and simulation based calibration in @mc-stan.org

Feedback is very welcome!

4 weeks ago 52 12 2 2