Mariska Leeflang
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mariskaleeflang.bsky.social
Mariska Leeflang
@mariskaleeflang.bsky.social
2.6K followers 450 following 120 posts
Professor in Clinical epidemiology, with a focus on medical tests and diagnostic test accuracy #SystematicReviews. Interested in #reproducibility of science. osiris4r.eu
#AcademicSky #EpiSky
Posts Replies Media Videos
Reposted by Mariska Leeflang
eikofried.bsky.social
I'm in Sydney until December 15th.

If any tweeps (blueskyers?) are around lets get lunch or coffee!

Also ... if you allow random strangers to join your D&D* group for a few weeks ... pleeeeeeease let me know :)))

___
* or whatever pen & paper y'all are up to
a close up of a feather on a rock with the words `` hello '' written in white letters .
ALT: a close up of a feather on a rock with the words `` hello '' written in white letters .
media.tenor.com
November 12, 2025 at 3:42 AM
Reposted by Mariska Leeflang
jclinepi.bsky.social
Methodological review reveals essential gaps and inconsistencies in clinical claims, effects and outcomes in HTA reviews of diagnostic tests - Journal of Clinical Epidemiology www.jclinepi.com/article/S089...
Methodological review reveals essential gaps and inconsistencies in clinical claims, effects and outcomes in HTA reviews of diagnostic tests
Essential first steps in performing a health technology assessment (HTA) for a diagnostic test include: consideration of the clinical pathway in which the test will be used, specifying the clinical cl...
www.jclinepi.com
November 10, 2025 at 3:50 PM
Reposted by Mariska Leeflang
hesterloeff.bsky.social
Voor mensen die mijn webshop willen bekijken, het is niks bijzonders. Er staat 1 product in maar wel met 6 verschillende betaalmethoden. En bestellen kan nog steeds gewoon hier op Bluesky voornamelijk tot ik alles uitgevogeld heb.

Www.hetwonderkabinet.nl
Het Wonderkabinet
De Atelier en Wunderkammer van Hester Loeff. Met handgemaakte kabinetjes en schelptekeningen maar ook naturalia zoals fossielen en schelpen.
Www.hetwonderkabinet.nl
November 8, 2025 at 1:24 PM
Reposted by Mariska Leeflang
frankvanwijck.bsky.social
De zorg doet domme dingen met slimme technologie. Terwijl het zo eenvoudig beter kan. www.artsenauto.nl/domme-dingen...
Domme dingen doen met slimme technologie - Arts en Auto - Frank van Wijck
Wat speelt in de zorg? Frank van Wijck schrijft op vrijdag over actuele uitspraken en ontwikkelingen. Deze keer: aanmeldzuilen.
www.artsenauto.nl
November 7, 2025 at 7:29 AM
Reposted by Mariska Leeflang
hesterloeff.bsky.social
Winkeldraadje van Het Wonderkabinet. Wat heb ik dit najaar te koop? Ik post alles hieronder zolang de webshop nog niet staat. Niet alles is op voorraad maar het meeste kan in opdracht (zolang de voorraad strekt en ik nog tijd heb). Graag een DM als je iets ziet en repost is lief!
November 3, 2025 at 6:59 PM
Reposted by Mariska Leeflang
irisvanrooij.bsky.social
‘Study after study shows that students want to develop these critical thinking skills, are not lazy, and large numbers of them would be in favor of banning ChatGPT and similar tools in universities’, says @olivia.science www.ru.nl/en/research/...
‘Opposing the inevitability of AI at universities is possible and necessary’ | Radboud University
Since the widespread release of ChatGPT in December of 2022, AI has taken over much of the world by storm – including academia. Most of this happened with very little pushback, despite a myriad of iss...
www.ru.nl
November 1, 2025 at 10:26 PM
Reposted by Mariska Leeflang
hesterloeff.bsky.social
Ik heb nog nieuwe groene in de maak. Ik maak ze nu met ontspiegeld Clarity glas, dat is een stuk mooier (zie foto) maar ook de prijs is anders. Ze komen dan inclusief (aangetekend) verzenden op €530,-
Als je er nog een wil reserveren (of een andere kleur) dan kun je een DM sturen.

Repost is lief
November 1, 2025 at 7:41 AM
Reposted by Mariska Leeflang
ruebli.bsky.social
#EpiSky, don't miss out on the opportunity to listen to interesting & entertaining keynote lectures by @mariskaleeflang.bsky.social (@amsterdamumc.bsky.social) & #OliverKuss (@ddzdiabetes.bsky.social, @hhu.de)! It's free & there will be food!
gmds-ev.bsky.social GMDS e.V. @gmds-ev.bsky.social · 16d
🍂 Herbstworkshop in Bielefeld 🍂

Am 20.–21.11.2025 treffen sich Expertinnen und Experte aus Statistik, Epidemiologie und klinischer Forschung zum interdisziplinären Austausch unter dem Motto:

From Evidence Synthesis to Precision Medicine

🔗 Registrierung: lnkd.in/eBU6iSQ2
ℹ️ Infos: lnkd.in/ezpD_kiV
October 30, 2025 at 4:45 PM
Reposted by Mariska Leeflang
elisabethbik.bsky.social
Radboud researchers René Aquarius @deadneanderthals.bsky.social and Kim Wever were about to embark on a literature review project when they noticed several odd things that made them stop in their tracks, then change the course of their study entirely.
October 30, 2025 at 6:48 PM
mariskaleeflang.bsky.social
For all those among us who like their multivariable analyses in what these authors call "factors associated with" studies.
danlewer.bsky.social Dan Lewer @danlewer.bsky.social · 16d
We wrote an article explaining why you shouldn't put several variables into a regression model and report which are statistically significant - even as exploratory research. bmjmedicine.bmj.com/content/4/1/.... How did we do?
A "methods primer" article in the journal "BMJ Medicine", titled "Factors associated with: problems of using exploratory multivariable regression to identify causal risk factors"
October 27, 2025 at 8:04 PM
Reposted by Mariska Leeflang
alexh.bsky.social
MetaROR, a platform for reviews of research on research, is a success! We have published 24 sets of reviews and have 16 submissions in process. MetaROR now has 9 partners - these are journals that agree to use our reviews when authors submit to them. metaror.org #metascience #openaccess
Home - MetaROR
MetaResearch Open Review MetaResearch Open Review MetaResearch Open Review A new platform designed to transform how we review and share metaresearch A new platform designed to transform
metaror.org
October 26, 2025 at 10:33 PM
Reposted by Mariska Leeflang
alexpghayes.com
this thread nicely describes the epistemology of a decent portion of modern meta-science, and i think also explains why it lost steam
richarddmorey.bsky.social Richard D. Morey @richarddmorey.bsky.social · Sep 25
Simonsohn has now posted a blog response to our recent paper about the poor statistical properties of the P curve. @clintin.bsky.social and I are finishing up a less-technical paper that will serve as a response. But I wanted to address a meta-issue *around* this that may clarify some things. 1/x
datacolada.bsky.social Data Colada @datacolada.bsky.social · Sep 24
Would p-curve work if you dropped a piano on it?
datacolada.org/129
October 24, 2025 at 5:29 AM
Reposted by Mariska Leeflang
annekevenema.bsky.social
Iemand in (de buurt) van Utrecht die wil en kan?
October 16, 2025 at 2:08 PM
Reposted by Mariska Leeflang
hesterloeff.bsky.social
Zoek de verschillen
October 16, 2025 at 2:13 PM
Reposted by Mariska Leeflang
jessdkant.bsky.social
Energy requirements for AI mean that the only way for the bubble not to burst would require companies to multiply their carbon footprint to an unimaginable degree. Right now, while AI is barely functional and mostly a novelty for the lazy, it requires so much energy that data centers rival cities.
October 9, 2025 at 11:11 AM
Reposted by Mariska Leeflang
vargaslab.bsky.social
⭐️Nominate an Impactful Dataset

@agu.org invites you to nominate an impactful dataset!

📊Submissions will be considered for inclusion in an upcoming featured commentary published in AGU Advances.

Submit nominations by 20 October.

docs.google.com/forms/d/e/1F...

@agubiogeosciences.bsky.social
Nominate an Impactful Dataset
You are invited to nominate a dataset to be included in a commentary about the impact of Earth, space, and environmental data using the dimensions of people, planet, and prosperity. Selected submitter...
docs.google.com
October 5, 2025 at 6:32 PM
Reposted by Mariska Leeflang
gidmk.bsky.social
I have just left a lengthy Pubpeer comment on the autism/Tylenol study being cited by the Trump administration. There appear to be a number of fairly straightforward errors in the paper.

pubpeer.com/publications...
PubPeer - Evaluation of the evidence on acetaminophen use and neurodev...
There are comments on PubPeer for publication: Evaluation of the evidence on acetaminophen use and neurodevelopmental disorders using the Navigation Guide methodology (2025)
pubpeer.com
October 1, 2025 at 5:03 AM
mariskaleeflang.bsky.social
Great idea!
@ingestegeman.bsky.social
September 24, 2025 at 4:17 PM
Reposted by Mariska Leeflang
irisvanrooij.bsky.social
"De wetenschappelijke integriteit staat op het spel nu universiteiten [AI] zonder kritische bezinning omarmen. Dat is de waarschuwing van een internationale groep van achttien wetenschappers, onder leiding van onderzoekers van de Radboud Universiteit.”

www.scienceguide.nl/2025/09/ai-s... 1/🧵
AI schaadt wetenschappelijke integriteit en vergroot kansenongelijkheid, waarschuwen wetenschappers - ScienceGuide
De wetenschappelijke integriteit staat op het spel nu universiteiten kunstmatige intelligentie zonder kritische bezinning omarmen. Dat is de waarschuwing van een internationale groep van zestien weten...
www.scienceguide.nl
September 18, 2025 at 9:02 PM
Reposted by Mariska Leeflang
olivia.science
Finally! 🤩 Our position piece: Against the Uncritical Adoption of 'AI' Technologies in Academia:
doi.org/10.5281/zeno...

We unpick the tech industry’s marketing, hype, & harm; and we argue for safeguarding higher education, critical
thinking, expertise, academic freedom, & scientific integrity.
1/n
Abstract: Under the banner of progress, products have been uncritically adopted or even imposed on users — in past centuries with tobacco and combustion engines, and in the 21st with social media. For these collective blunders, we now regret our involvement or apathy as scientists, and society struggles to put the genie back in the bottle. Currently, we are similarly entangled with artificial intelligence (AI) technology. For example, software updates are rolled out seamlessly and non-consensually, Microsoft Office is bundled with chatbots, and we, our students, and our employers have had no say, as it is not considered a valid position to reject AI technologies in our teaching and research. This is why in June 2025, we co-authored an Open Letter calling on our employers to reverse and rethink their stance on uncritically adopting AI technologies. In this position piece, we expound on why universities must take their role seriously toa) counter the technology industry’s marketing, hype, and harm; and to b) safeguard higher education, critical thinking, expertise, academic freedom, and scientific integrity. We include pointers to relevant work to further inform our colleagues. Figure 1. A cartoon set theoretic view on various terms (see Table 1) used when discussing the superset AI (black outline, hatched background): LLMs are in orange; ANNs are in magenta; generative models are in blue; and finally, chatbots are in green. Where these intersect, the colours reflect that, e.g. generative adversarial network (GAN) and Boltzmann machine (BM) models are in the purple subset because they are both generative and ANNs. In the case of proprietary closed source models, e.g. OpenAI’s ChatGPT and Apple’s Siri, we cannot verify their implementation and so academics can only make educated guesses (cf. Dingemanse 2025). Undefined terms used above: BERT (Devlin et al. 2019); AlexNet (Krizhevsky et al. 2017); A.L.I.C.E. (Wallace 2009); ELIZA (Weizenbaum 1966); Jabberwacky (Twist 2003); linear discriminant analysis (LDA); quadratic discriminant analysis (QDA). Table 1. Below some of the typical terminological disarray is untangled. Importantly, none of these terms are orthogonal nor do they exclusively pick out the types of products we may wish to critique or proscribe. Protecting the Ecosystem of Human Knowledge: Five Principles
September 6, 2025 at 8:13 AM
Reposted by Mariska Leeflang
icr-ctsu.bsky.social
We're currently looking for a Trials Methodologist/Senior Trials Methodologist to join our team.

You can find out more about the role and how to apply here:
jobs.icr.ac.uk/vacancies/13...

#ResearchJobs #TrialsMethodology🧪
Trials Methodologist/ Senior Trials Methodologist (Statistics) in Sutton | The Institute of Cancer Research
View details and apply for this Trials Methodologist/ Senior Trials Methodologist (Statistics) vacancy in Sutton. Salary : Commencement on the salary range is subject to comparable skills an...
jobs.icr.ac.uk
September 17, 2025 at 8:26 AM
Reposted by Mariska Leeflang
irisvanrooij.bsky.social
New people are signing our open letter almost everyday, and it is so heartening to see. Especially good to see familiar names sign.

openletter.earth/open-letter-...
Open Letter: Stop the Uncritical Adoption of AI Technologies in Academia
openletter.earth
September 16, 2025 at 8:54 PM
Reposted by Mariska Leeflang
retractionwatch.com
Drummond Rennie (1936-2025), in his own words

Rennie, who died on September 12, was a towering figure in scientific publishing, known for promoting improved standards in medical journals, and for organizing the first Peer Review Congress, held in 1989, and every four years since.
Drummond Rennie (1936-2025), in his own words
Drummond Rennie I first became aware of the work of Drummond Rennie almost by accident: By borrowing his office. It was the summer of 1997, and as a rising fourth-year medical student, I was spendi…
retractionwatch.com
September 15, 2025 at 7:56 PM
Reposted by Mariska Leeflang
ekfarran.bsky.social
Time for our annual update of "Open Research across disciplines".
pdf: www.ukrn.org/disciplines/
K Reproducibility Network (UKRN) webpages: www.ukrn.org/disciplines/

Resources to add, please use (by 30/09/25): docs.google.com/forms/d/e/1F...

@camillakgilmore.bsky.social @priyasilverstein.com
September 16, 2025 at 10:19 AM
Reposted by Mariska Leeflang
lexbouter.bsky.social
I've just updated my preprint on short personal reviews of novels on hashtag#ResearchIntegrity bit.ly/409E5ff
Please attend me to novels which you believe to belong to this list, but are not yet included.
The preprint recently also has been published in a Chinese journal: bit.ly/3K6P17B
September 17, 2025 at 6:31 AM