Jesper Wulff | Lightnews

Jesper N. Wulff

@jnwulff.bsky.social

680 followers 960 following 43 posts

Professor @AarhusUni doing research on organizational research methods and teaching deep neural networks in our Msc. BI program. https://sites.google.com/view/jesperwulff/bio

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Business 66%

Economics 34%

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Reposted by Suresh Venkatasubramanian, Ashish Arora, Martin Paul Eve , and 3 more Suresh Venkatasubramanian, Ashish Arora, Martin Paul Eve, Göran Bolin, Julie Novkov, Jesper Wulff

Peter Suber @petersuber.bsky.social · 4d

A review of the proceedings from four major computer-science conferences showed that none from 2021, and all from 2025, had fake citations.
arxiv.org/abs/2602.058...

#AI #LLMs #Hallucinations #Misconduct #ScholComm

The Case of the Mysterious Citations

Mysterious citations are routinely appearing in peer-reviewed publications throughout the scientific community. In this paper, we developed an automated pipeline and examine the proceedings of four ma...

arxiv.org

Reposted by Joanna Bryson, Rebecca Solnit, Rosie A. Fisher , and 12 more Joanna Bryson, Rebecca Solnit, Rosie A. Fisher, Leo Lucassen, Mary Feeney, Elizabeth Stokoe, Ralf Michaels, Robert C. Richards, Robert B. Reich, David C. Kimball, Dana R. Fisher, Mark Rice, Aviel Roshwald, Olúfẹ́mi Táíwò, Jesper Wulff

Dave Vetter @davidrvetter.bsky.social · 5d

"A modern-day concentration camp ... People have been killed by the staff here." Irish citizen Seamus Culleton has been in ICE detention since September, despite having a valid work permit and his own business in the US.

Reposted by Ian Hussey, Patrick S. Forscher, Jesper Wulff

Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 13d

Wow this scoring chaos seems to be an extreme case of what I say about many ad hoc analyses: no derivation of method from a clear scientific theory, no assessment of statistical properties, and decades pass before someone notices. This happens in biology too, so let’s not pick on psychology only

Tom Stafford @tomstafford.mastodon.online.ap.brid.gy · 14d

Read my latest post for reflections on reproducibility, research quality and a summary of a great new study which shows how NOT to do it

https://open.substack.com/pub/tomstafford/p/gambling-with-research-quality

Gambling with research quality

How you get 244 different ways to measure performance on the same test of decision making. And what it means for the reliability of behavioural science

tomstafford.substack.com

Reposted by Jesper Wulff

Eric Hillebrand @erichillebrand.bsky.social · Jan 15

Associate or full position in energy economics at AU!

Link in comment

#assa #aea #eea #econjobmarket #academicjobs #iaee | Center for Research in Energy: Economics and Markets - CoRE

Institut for Økonomi, Aarhus Universitet and Center for Research in Energy: Economics and Markets - CoRE, invite expressions of interest from distinguished scholars for a tenured position as Associate...

www.linkedin.com

Jesper N. Wulff @jnwulff.bsky.social · Jan 14

Thanks! I'll give it another go.

Jesper N. Wulff @jnwulff.bsky.social · Jan 9

This looks very cool. Downloaded it, but then I needed something called Azul Zulu JRE with JavaFX, which I never heard of before. Downloaded that and then it wouldn't install.

If you want more people to use this, make a browser app so anyone can just click a link, upload their thing and then go.

Jesper N. Wulff @jnwulff.bsky.social · Jan 6

Multiple entities over multiple time periods, e.g., same people across years. So at least two periods as long as the same people are observed in both periods.

Reposted by Shannon Vallor, Henrik Skaug Sætra, Jesper Wulff

Ben Williamson @benpatrickwill.bsky.social · Dec 19

(Also, icyi, here are the 42 papers citing our non-existent paper which includes a "meta-analysis" - often called the evidence "gold standard" - of "LLM effects" in education 🤮
scholar.google.com.vn/scholar?star...)

scholar.google.com.vn

Reposted by Dorothy Bishop, David Chester, Andrew K Przybylski , and 5 more Dorothy Bishop, David Chester, Andrew K Przybylski, Magnus Johansson, Patrick S. Forscher, Ariadne Vromen, Johannes Breuer, Jesper Wulff

Ian Hussey @ianhussey.mmmdata.io · Dec 12

Keeping this at hand in case I need to point to it and tap

Reposted by Michael A. Clemens, Kathleen J. Mullen, Paolo Crosetto , and 8 more Michael A. Clemens, Kathleen J. Mullen, Paolo Crosetto, Aaron Sojourner, Paul Goldsmith-Pinkham, Juan Rocha, Winston T. Lin, Simon Munzert, Samuel Coavoux, Gábor Békés, Jesper Wulff

Andrew Heiss @andrew.heiss.phd · Dec 9

Some closing thoughts for my students this semester on LLMs and learning #rstats datavizf25.classes.andrewheiss.com/news/2025-12...

Will you incorporate LLMs and AI prompting into the course in the future?
No.

Why won’t you incorporate LLMs and AI prompting into the course?
These tools are useful for coding (see this for my personal take on this).

However, they’re only useful if you know what you’re doing first. If you skip the learning-the-process-of-writing-code step and just copy/paste output from ChatGPT, you will not learn. You cannot learn. You cannot improve. You will not understand the code.

In that post, it warns that you cannot use it as a beginner:

…to use Databot effectively and safely, you still need the skills of a data scientist: background and domain knowledge, data analysis expertise, and coding ability.

There is no LLM-based shortcut to those skills. You cannot LLM your way into domain knowledge, data analysis expertise, or coding ability.

The only way to gain domain knowledge, data analysis expertise, and coding ability is to struggle. To get errors. To google those errors. To look over the documentation. To copy/paste your own code and adapt it for different purposes. To explore messy datasets. To struggle to clean those datasets. To spend an hour looking for a missing comma.

This isn’t a form of programming hazing, like “I had to walk to school uphill both ways in the snow and now you must too.” It’s the actual process of learning and growing and developing and improving. You’ve gotta struggle.

This Tumblr post puts it well (it’s about art specifically, but it applies to coding and data analysis too):

Contrary to popular belief the biggest beginner’s roadblock to art isn’t even technical skill it’s frustration tolerance, especially in the age of social media. It hurts and the frustration is endless but you must build the frustration tolerance equivalent to a roach’s capacity to survive a nuclear explosion. That’s how you build on the technical skill. Throw that “won’t even start because I’m afraid it won’t be perfect” shit out the window. Just do it. Just start. Good luck. (The original post has disappeared, but here’s a reblog.)

It’s hard, but struggling is the only way to learn anything.

You might not enjoy code as much as Williams does (or I do), but there’s still value in maintaining codings skills as you improve and learn more. You don’t want your skills to atrophy.

As I discuss here, when I do use LLMs for coding-related tasks, I purposely throw as much friction into the process as possible:

To avoid falling into over-reliance on LLM-assisted code help, I add as much friction into my workflow as possible. I only use GitHub Copilot and Claude in the browser, not through the chat sidebar in Positron or Visual Studio Code. I treat the code it generates like random answers from StackOverflow or blog posts and generally rewrite it completely. I disable the inline LLM-based auto complete in text editors. For routine tasks like generating {roxygen2} documentation scaffolding for functions, I use the {chores} package, which requires a bunch of pointing and clicking to use.

Even though I use Positron, I purposely do not use either Positron Assistant or Databot. I have them disabled.

So in the end, for pedagogical reasons, I don’t foresee me incorporating LLMs into this class. I’m pedagogically opposed to it. I’m facing all sorts of external pressure to do it, but I’m resisting.

You’ve got to learn first.

Reposted by John A. Finn, Jesper Wulff

Darren Dahly @statsepi.bsky.social · Dec 7

🎯

statsepi.substack.com/p/the-review...

Reposted by Jesper Wulff

Richard @rwpickard.bsky.social · Nov 27

Some comments on PubPeer: pubpeer.com/publications...

PubPeer - Bridging the gap: explainable ai for autism diagnosis and pa...

There are comments on PubPeer for publication: Bridging the gap: explainable ai for autism diagnosis and parental support with TabPFNMix and SHAP (2025)

pubpeer.com

Erik Angner @erikangner.com · Nov 27

"Runctitiononal features"? "Medical fymblal"? "1 Tol Line storee"? This gets worse the longer you look at it. But it's got to be good, because it was published in Nature Scientific Reports last week: www.nature.com/articles/s41... h/t @asa.tsbalans.se

Infographic with AI slop published in Nature Scientific Reports

Reposted by Jesper Wulff

Andrew Heiss @andrew.heiss.phd · Nov 21

hahahaha just got an email from someone who was using Claude to generate a boilerplate #QuartoPub document and the LLM *used my name* as the author. The computers are literally trying to be me now 😂🤣🙃🫠

A Quarto document in RStudio with the author field set to "Andrew Heiss"

Jesper N. Wulff @jnwulff.bsky.social · Nov 20

Which tools are you using for making them?

Reposted by Felicity Callard, Lindsay M. Tedds, Dana R. Fisher , and 4 more Felicity Callard, Lindsay M. Tedds, Dana R. Fisher, Lisa Diedrich, Marcus Credé, Melinda Baldwin, Jesper Wulff

ElieNYC @elienyc.bsky.social · Nov 19

I know that at this point it's a subplot in the Epstein files drama, but I feel compelled to point out, once again, that Larry Summers HAS NO BUSINESS teaching students at ANY university ever again!

My latest cries into the abyss, in @thenation.com

www.thenation.com/article/soci...

Why Is Larry Summers Still Employed?

The revelations about the economist’s attempts to pressure a women into a “relationship”—with guidance from Jeffrey Epstein—should finally disqualify him from teaching students.

www.thenation.com

Jesper N. Wulff @jnwulff.bsky.social · Nov 17

I've used your book several times for a graduate course on Bayes stats for business and data science students with great success. If you divide into beginner and adv. I imagine the first half would fit well for a bachelor level course.

Reposted by Cas Mudde, Anna O. Law, Kim L. Scheppele , and 48 more Cas Mudde, Anna O. Law, Kim L. Scheppele, Heidi Altman, Richard S.J. Tol, Norbert Schwarz, Nancy Kanwisher, John F. McCarthy, Stefan Reis, Brendan Nyhan, Linda J. Skitka, Gavin A. Schmidt, Jesse H. Kroll, John R. Hutchinson, Bryan D. Jones, Glenn Lyons, Rosemary A. Joyce, Jonathan M. Gilligan, Melissa R. Michelson, Philip Nel, Anders Nilsson, Melanie C. Green, W. Andy Knight, Julia Lynch, Roopika Risam, Gerald Friedman, Alison Johnson, Mary L. Dudziak, Rebecca M. Bratspies, Michael D. McDonald, William Myers, Dana R. Fisher, Nikolay Marinov, Jason Lyall, Daryl Adair, Erin O’Donnell, Thomas Masterson, Sharon S. Dawes, Nelson Flores, Alessandro Rigolon, Nicole Guenther Discenza, Linda L. Berger, Annette Yoshiko Reed, Jean Kazez, Dan Immergluck, Sylvia Perry, Timothy D. McBride, Dunlap, Deborah M. Kolb, Adam M. Kleinbaum, Jesper Wulff

Aaron Parnas @aaronparnas.bsky.social · Nov 16

NEW: Epstein survivors release the most powerful PSA I have ever seen.

Make this go viral so every member of the House of Representatives sees it.

Reposted by Dorothy Bishop, Ian Hussey, Jesper Wulff

Retraction Watch @retractionwatch.com · Nov 16

A paper critiquing post-publication peer review has numerous made-up references, including a @nature.com article falsely attributed to our Ivan Oransky.
link.springer.com/article/10.1...

PubPeer - An expert criticism on post-publication peer review platform...

There are comments on PubPeer for publication: An expert criticism on post-publication peer review platforms: the case of pubpeer (2025)

pubpeer.com

Reposted by Johannes Breuer, Jesper Wulff

Cursor @cursortue.bsky.social · Nov 13

TU/e has gained a new research centre: META/e. Daniël Lakens and Krist Vaesen were among the founders of this knowledge hub for metascience—research aimed at improving the practice of science itself. “We want to be a home for every researcher who occasionally wonders: what are we even doing?”

Knowledge centre META/e: home for those improving science

www.cursor.tue.nl

Jesper N. Wulff @jnwulff.bsky.social · Nov 1

Yes!!

Anne Scheel @annemscheel.bsky.social · Oct 31

There still seems to be a lot of confusion about significance testing in psych. No, p-values *don’t* become useless at large N. This flawed point also used to be framed as "too much power". But power isn't the problem – it's 1) unbalanced error rates and 2) the (lack of a) SESOI. 1/ >

Reposted by Gordon Pennycook, Alexander Wuttke, Ingo Rohlfing , and 2 more Gordon Pennycook, Alexander Wuttke, Ingo Rohlfing, Dean Eckles, Jesper Wulff

Anne Scheel @annemscheel.bsky.social · Oct 31

Reposted by Jesper Wulff

Daniel Lakens @lakens.bsky.social · Sep 28

New blog post on Gelman's recent claim that Type S and M errors are intended as a 'rhetorical tool', and if I was wrong to believe they were recommended more routinely in our recent preprint criticizing the idea of Type S and M errors. daniellakens.blogspot.com/2025/09/type...

Type S and M errors as a “rhetorical tool”

We recently posted a preprint criticizing the idea of Type S and M errors ( https://osf.io/2phzb_v1 ). From our abstract: “While these conce...

daniellakens.blogspot.com

Jesper N. Wulff @jnwulff.bsky.social · Sep 25

What corresponds to the Z-test in this analogy? If the P-curve is the W-test then what is the Z-test?

Reposted by Jesper Wulff

Richard Sever @richardsever.bsky.social · Sep 23

More examples of faked institutional email addresses from @deevybee.bsky.social here deevybee.blogspot.com/2022/10/what...

Jesper N. Wulff @jnwulff.bsky.social · Sep 16

9 Equivalence Testing and Interval Hypotheses – Improving Your Statistical Inferences share.google/tZRu9HekIBdY...

9 Equivalence Testing and Interval Hypotheses – Improving Your Statistical Inferences

This open educational resource contains information to improve statistical inferences, design better experiments, and report scientific research more transparently.

share.google

Jesper N. Wulff @jnwulff.bsky.social · Sep 16

Absolutely! I'm planning on getting met into the stats curriculum in our undergrad business adm program. My favorite resource is Lakens' online book.

Jesper N. Wulff @jnwulff.bsky.social · Sep 16

If it makes sense to test a hypothesis, do minimum effect testing and/or set alpha as a function of sample size.

Reposted by Alexander Wuttke, Christian Breunig, Graham Webster , and 6 more Alexander Wuttke, Christian Breunig, Graham Webster, Patrick Präg, Johannes Breuer, Larry W. Hunter, Aleksandra Urman, Samuel Coavoux, Jesper Wulff

Joachim Baumann @joachimbaumann.bsky.social · Sep 12

🚨 New paper alert 🚨 Using LLMs as data annotators, you can produce any scientific result you want. We call this **LLM Hacking**.

Paper: arxiv.org/pdf/2509.08825

$We present our new preprint titled "Large Language Model Hacking: Quantifying the Hidden Risks of Using LLMs for Text Annotation". We quantify LLM hacking risk through systematic replication of 37 diverse computational social science annotation tasks. For these tasks, we use a combined set of 2,361 realistic hypotheses that researchers might test using these annotations. Then, we collect 13 million LLM annotations across plausible LLM configurations. These annotations feed into 1.4 million regressions testing the hypotheses. For a hypothesis with no true effect (ground truth $p > 0.05$), different LLM configurations yield conflicting conclusions. Checkmarks indicate correct statistical conclusions matching ground truth; crosses indicate LLM hacking -- incorrect conclusions due to annotation errors. Across all experiments, LLM hacking occurs in 31-50\% of cases even with highly capable models. Since minor configuration changes can flip scientific conclusions, from correct to incorrect, LLM hacking can be exploited to present anything as statistically significant.$

Reposted by Jesper Wulff

Marieke van Vugt @mvugt.bsky.social · Sep 9

"OpenAI is making “small steps that are good, but I don’t think we’re anywhere near where we need to be”, says Mark Steyvers, a cognitive science and AI researcher at UC Irvine. “It’s not frequent enough that GPT says ‘I don’t know’.”" www.nature.com/articles/d41...

Can researchers stop AI making up citations?

OpenAI’s GPT-5 hallucinates less than previous models do, but cutting hallucination completely might prove impossible.

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