Daniel Gerdesmann
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dgerdesmann.de
Daniel Gerdesmann
@dgerdesmann.de
690 followers 330 following 54 posts
PhD candidate based in Freiburg im Breisgau, Germany.
Science Education | Psychology | R | Open Science | Open Source Tools
https://dgerdesmann.de
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Reposted by Daniel Gerdesmann
allisonmaster.bsky.social
Happy #CSEdWeek! Since 2020, I’ve been sharing some of our lab’s research on gender equity in CS to celebrate. Despite progress in access/participation, disparities remain in K-12 CS education. (1/12) #WomeninSTEM #AcademicSky #PsychSciSky #DevPsychSky #SocialPsyc #EduSky #CompSky #GirlsLeadSTEM
December 8, 2025 at 6:00 PM
Reposted by Daniel Gerdesmann
alelazic.bsky.social
Blogs deserve love too (and interoperability) ❤️

Rogue Scholar (rogue-scholar.org) makes science blogs more findable and citable: full-text search, long-term archiving, DOIs, metadata...

You can register your blog and search ~200 blogs already there.

Wrote more at www.linkedin.com/posts/alelaz...
Screenshot showing The Rogue Scholar logo. The text in larger font says "Science blogging on steroids". Below it, in smaller font, it says "The Rogue Scholar improves your science blog in important ways, including full-text search, long-term archiving, DOIs and metadata."
December 8, 2025 at 3:02 PM
Reposted by Daniel Gerdesmann
dariia.bsky.social
#rstats #EconSky Are there any R packages for difference in discontinuities? I know a lot of RDD ones, but can't find any specifically for diff in discontiniuties. Thanks!
December 8, 2025 at 12:10 PM
Reposted by Daniel Gerdesmann
mmaruta.bsky.social
Šeit ir dažādu Eiropas institūciju Buesky saeaksts
go.bsky.app/DGmA6ub
Ceram arī vairāk LV oficiālo iestāžu komunikāciju te redzēt
December 7, 2025 at 4:03 PM
Reposted by Daniel Gerdesmann
dsfpspacefl1ght.bsky.social
Is anyone out there used to explaining the concept of "gravity losses" in the context of departure from orbit around a planet?

If so, I'd be delighted to learn how you explain it. I've been having a rough time of it - don't want to get it wrong.
December 7, 2025 at 3:48 PM
Reposted by Daniel Gerdesmann
harriet-mason.bsky.social
HEY! YOU! ggdibbler 0.6.1 is finally up on CRAN!

harriet-mason.github.io/ggdibbler/in...

You can now pass random variables to any aesthetic in any ggplot geom/stat. If you can express it as a distribution, ggdibbler can plot it. It also works with ggplot extensions, like gganimate. #rstats
December 6, 2025 at 3:16 PM
Reposted by Daniel Gerdesmann
feadeh.bsky.social
Friends of Arab and Muslim descent, please fill out our survey! Please share!
December 4, 2025 at 9:42 PM
Reposted by Daniel Gerdesmann
drclintonlisell.bsky.social
We’re conducting a research study on how generative AI can help create illustrative diagrams to support mathematical problem-solving in open educational resources (OER). #oer
December 3, 2025 at 4:57 PM
Reposted by Daniel Gerdesmann
hansonmark.bsky.social
We wrote the Strain on scientific publishing to highlight the problems of time & trust. With a fantastic group of co-authors, we present The Drain of Scientific Publishing:

a 🧵 1/n

Drain: arxiv.org/abs/2511.04820
Strain: direct.mit.edu/qss/article/...
Oligopoly: direct.mit.edu/qss/article/...
A table showing profit margins of major publishers. A snippet of text related to this table is below. 1. The four-fold drain 1.1 Money Currently, academic publishing is dominated by profit-oriented, multinational companies for whom scientific knowledge is a commodity to be sold back to the academic community who created it. The dominant four are Elsevier, Springer Nature, Wiley and Taylor & Francis, which collectively generated over US$7.1 billion in revenue from journal publishing in 2024 alone, and over US$12 billion in profits between 2019 and 2024 (Table 1A). Their profit margins have always been over 30% in the last five years, and for the largest publisher (Elsevier) always over 37%. Against many comparators, across many sectors, scientific publishing is one of the most consistently profitable industries (Table S1). These financial arrangements make a substantial difference to science budgets. In 2024, 46% of Elsevier revenues and 53% of Taylor & Francis revenues were generated in North America, meaning that North American researchers were charged over US$2.27 billion by just two for-profit publishers. The Canadian research councils and the US National Science Foundation were allocated US$9.3 billion in that year. A figure detailing the drain on researcher time. 1. The four-fold drain 1.2 Time The number of papers published each year is growing faster than the scientific workforce, with the number of papers per researcher almost doubling between 1996 and 2022 (Figure 1A). This reflects the fact that publishers’ commercial desire to publish (sell) more material has aligned well with the competitive prestige culture in which publications help secure jobs, grants, promotions, and awards. To the extent that this growth is driven by a pressure for profit, rather than scholarly imperatives, it distorts the way researchers spend their time. The publishing system depends on unpaid reviewer labour, estimated to be over 130 million unpaid hours annually in 2020 alone (9). Researchers have complained about the demands of peer-review for decades, but the scale of the problem is now worse, with editors reporting widespread difficulties recruiting reviewers. The growth in publications involves not only the authors’ time, but that of academic editors and reviewers who are dealing with so many review demands. Even more seriously, the imperative to produce ever more articles reshapes the nature of scientific inquiry. Evidence across multiple fields shows that more papers result in ‘ossification’, not new ideas (10). It may seem paradoxical that more papers can slow progress until one considers how it affects researchers’ time. While rewards remain tied to volume, prestige, and impact of publications, researchers will be nudged away from riskier, local, interdisciplinary, and long-term work. The result is a treadmill of constant activity with limited progress whereas core scholarly practices – such as reading, reflecting and engaging with others’ contributions – is de-prioritized. What looks like productivity often masks intellectual exhaustion built on a demoralizing, narrowing scientific vision. A table of profit margins across industries. The section of text related to this table is below: 1. The four-fold drain 1.1 Money Currently, academic publishing is dominated by profit-oriented, multinational companies for whom scientific knowledge is a commodity to be sold back to the academic community who created it. The dominant four are Elsevier, Springer Nature, Wiley and Taylor & Francis, which collectively generated over US$7.1 billion in revenue from journal publishing in 2024 alone, and over US$12 billion in profits between 2019 and 2024 (Table 1A). Their profit margins have always been over 30% in the last five years, and for the largest publisher (Elsevier) always over 37%. Against many comparators, across many sectors, scientific publishing is one of the most consistently profitable industries (Table S1). These financial arrangements make a substantial difference to science budgets. In 2024, 46% of Elsevier revenues and 53% of Taylor & Francis revenues were generated in North America, meaning that North American researchers were charged over US$2.27 billion by just two for-profit publishers. The Canadian research councils and the US National Science Foundation were allocated US$9.3 billion in that year. The costs of inaction are plain: wasted public funds, lost researcher time, compromised scientific integrity and eroded public trust. Today, the system rewards commercial publishers first, and science second. Without bold action from the funders we risk continuing to pour resources into a system that prioritizes profit over the advancement of scientific knowledge.
November 11, 2025 at 11:52 AM
Reposted by Daniel Gerdesmann
jamesheathers.bsky.social
Diederik Stapel was a massive watershed moment in psychology.

However, he was -- and let's be slightly glib here -- some guy from The Netherlands who wrote social psychology papers.

The full accounting of the Eysenck case is approx, at minimum, TWO STAPELS.

retractionwatch.com/2025/12/03/n...
Number of ‘unsafe’ publications by psychologist Hans Eysenck could be ‘high and far reaching’
Hans Eysenck A “high and far reaching” number of papers and books by Hans Eysenck could be “unsafe,” according to an updated statement from King’s College London, where the psychologist was a profe…
retractionwatch.com
December 3, 2025 at 5:34 PM
Reposted by Daniel Gerdesmann
ruben.the100.ci
Want to make nice graphs with me, starting next year? I'm hiring for a position at the University of Witten/Herdecke.
uni-wh.softgarden.io/job/61280592...
‘A fragmented field: Construct and measure proliferation in psychology.’ (2025) From ‘Language models accurately infer correlations between psychological items and scales from text alone.’ (2025) From ‘Not within spitting distance: salivary immunoassays of estradiol have subpar validity for predicting cycle phase.’ (2023) Work in progress with cycle tracking data from the app Clue
December 3, 2025 at 12:48 PM
Reposted by Daniel Gerdesmann
lakens.bsky.social
Metacheck can now automatically 1) download a preprint from PsyArXiv, 2) create a report of the checks (stats, reporting guidelines, references, code, etc), 3) retrieve the authors email, and 4) send them the report.

Would you as an author appreciate this? When yes, when no?
December 2, 2025 at 6:12 PM
Reposted by Daniel Gerdesmann
ruben.the100.ci
Fadeout of cognitive training remains one of the more replicable
findings in psychology in this preregistered study of 300 preschool children. Well-done study with a 4 year follow up. The language gains either faded or the control group caught up.
journals.sagepub.com/doi/full/10....
Fig. 3. Effects of the intervention. In (a) are shown effects 7 months after the intervention; in (b) are shown interaction effects 7 months after the intervention. Models show the effects of the intervention on expressive-language skills in the grade 1 posttest, with an interaction between expressive-language skills in the pretest and after the intervention. Standardized coefficients (with 95% confidence intervals) are shown, except for the intervention dummy variable and the interaction where y-standardized values are indicated. Rectangles and circles contain observed variables and latent variables, respectively. Solid arrows point to significant regression or factor loadings (arrows from latent variables to their observed indicators); the arrow with dotted lines shows nonsignificant regression. The interaction (Fig. 3b) is illustrated by the arrow from the black circle to expressive language in the posttest. **p < .01. Fig. 4. Long-term effects of the intervention on expressive-language skills. Model showing the effect of the intervention on expressive-language skills in the grade 4 posttest. Standardized coefficients (with 95% CIs) are shown, except for the intervention dummy variable where y-standardized values (equal to Cohen’s d) are indicated. Rectangles and circles contain observed variables and latent variables, respectively. Solid arrows point to significant regression or factor loadings (arrows from latent variables to their observed indicators); arrows with dotted lines show nonsignificant regression. **p < .01.
December 3, 2025 at 10:14 AM
Reposted by Daniel Gerdesmann
pewresearch.org
Across 25 countries we surveyed earlier this year, trust in others varies widely. But it tends to be higher in high-income countries than in middle-income ones.
A series of blue and green bars on a horizontal chart showing that social trust is higher in wealthier countries and lower in middle-income countries
December 2, 2025 at 9:09 PM
Reposted by Daniel Gerdesmann
ourworldindata.org
How many lives would be saved if Africa had other regions’ child mortality rates?

One of the starkest expressions of global inequality is a child’s chance of survival.
How many lives would be saved if Africa had other regions’ child mortality rates? Subtitle: Hypothetical number of children dying before the age of five in 2023. Summary: Africa currently has 2,840,000 under-five deaths; if it had Europe’s child mortality rate that would fall to 200,000, saving 2,640,000 lives. Tiles: - If Africa had the child mortality rate of Asia: 960,000 deaths, 1,880,000 lives saved. - South America: 690,000 deaths, 2,150,000 lives saved. - Oceania: 650,000 deaths, 2,190,000 lives saved. - North America: 480,000 deaths, 2,360,000 lives saved. - Europe: 200,000 deaths, 2,640,000 lives saved. Data source: Author calculations based on UN IGME (2025). License: CC BY.
December 2, 2025 at 3:03 PM
Reposted by Daniel Gerdesmann
fdabl.bsky.social
🚨 Mapping climate change coverage

In a new preprint, Simon Wimmer, @jmbh.bsky.social, and I analyzed over 50,000 articles about climate change from major German newspapers across the political spectrum (2010-2024) using large language models 🧵

🔗 Link: osf.io/preprints/so...
Title page of our paper
December 2, 2025 at 9:37 AM
Reposted by Daniel Gerdesmann
r2journal.bsky.social
Hello world! Follow this account to receive announcements, invitations for open peer review, and publications from Replication Research.
November 25, 2025 at 3:59 PM
Reposted by Daniel Gerdesmann
pewresearch.org
In 2025, 27% of Germans say relations with the U.S. are good, while 73% say they are bad – a complete flip from the last year (74% good vs. 22% bad).

Americans’ views – while more negative than in 2024 – continue to be positive toward the U.S.-Germany relationship overall.
Two line charts showing that Americans continue to say relations with Germany are good, as German views flip since last year
December 1, 2025 at 1:00 PM
Reposted by Daniel Gerdesmann
ansgarw.bsky.social
The Ruhrgebiet, once Europe’s largest industrial region, mined coal from the 13th century. By 1956 it employed almost half a million people, but within two decades the workforce had shrunk by two thirds. The last mine closed in 2018.

#30DayMapChallenge Day 28: Black #rstats #ggplot2
A map of the Ruhr area showing the coal seams as lines. Major cities are marked on the map.
November 29, 2025 at 5:52 PM
Reposted by Daniel Gerdesmann
pengzell.bsky.social
A thread of directed acyclic graphs (DAGs) that look like record covers... because that's EXACTLY what the world needs

1. Huey Lewis and the News: link.springer.com/chapter/10.1...
November 28, 2025 at 11:36 AM
Reposted by Daniel Gerdesmann
bjoernhommel.bsky.social
🚨 SynthNet is out 🚨
Researchers propose new constructs and measures faster than anyone can track. We (@anniria.bsky.social @ruben.the100.ci) built a search engine to check what already exists and help identify redundancies; indexing 74,000 scales from ~31,500 instruments in APA PsycTests. 🧵1/3
November 26, 2025 at 11:42 AM
Reposted by Daniel Gerdesmann
olivieroangeli.bsky.social
📣 PhDs & postdocs: Our Call for Papers is now open! If you work on (de)polarization including migration, media or radical right parties — come to Dresden in June 2026. We’re eager to see what ideas, cases and theories are out there!. Please share!

@tudresden.bsky.social @gsw-tudresden.bsky.social
November 27, 2025 at 3:42 PM
Reposted by Daniel Gerdesmann
jeffgreene.bsky.social
Why do some self-regulated learning interventions seem to benefit less competent students more than their competent peers, but others seem to benefit only the already competent students? Well...(1/2)

#PsychSciSky #AcademicSky #EduSky
authors.elsevier.com/c/1m9ns3irP4...
November 24, 2025 at 8:12 PM
Reposted by Daniel Gerdesmann
teresaober.bsky.social
Check out this new handbook on personalized learning!

Glad I have had the opportunity to contribute to this volume with Blair Lehman and @reginaldgooch.bsky.social
mattbernacki.bsky.social Matt Bernacki @mattbernacki.bsky.social · 14d
The Handbook of Personalized Learning is finally in print!

Arrived yesterday(!) & pre-order pricing thru 🦃. www.routledge.com/Handbook-of-...
We provided teachers & designers with a guide to theoretically supported PL design logic & demos across subject areas, ages, & contexts.

+DIY figure! ⬇️
Handbook of Personalized Learning, in print and held to show cover.
November 24, 2025 at 4:02 PM
Reposted by Daniel Gerdesmann
meodai.bsky.social
If you’re still hunting for color tools, I’m working on a more user-friendly version of meodai.github.io/poline/ keeping you huedrated
November 23, 2025 at 12:42 AM