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rogier kievit

@rogierk.bsky.social

Professor of Developmental Neuroscience @DondersInst and @radboudumc. Developmental cognitive neuroscience, brains, cognitive performance, longitudinal modeling, sourdough, science & Rstats.

4,834 Followers  |  1,425 Following  |  276 Posts  |  Joined: 06.10.2023  |  2.5686

Latest posts by rogierk.bsky.social on Bluesky

What’s a multiverse good for anyway?

Julia M. Rohrer, Jessica Hullman, and  Andrew Gelman

Multiverse analysis has become a fairly popular approach, as indicated by the present special issue on the matter. Here, we take one step back and ask why one would conduct a multiverse analysis in the first place. We discuss various ways in which a multiverse may be employed – as a tool for reflection and critique, as a persuasive tool, as a serious inferential tool – as well as potential problems that arise depending on the specific purpose. For example, it fails as a persuasive tool when researchers disagree about which variations should be included in the analysis, and it fails as a serious inferential tool when the included analyses do not target a coherent estimand. Then, we take yet another step back and ask what the multiverse discourse has been good for and whether any broader lessons can be drawn. Ultimately, we conclude that the multiverse does remain a valuable tool; however, we urge against taking it too seriously.

What’s a multiverse good for anyway? Julia M. Rohrer, Jessica Hullman, and Andrew Gelman Multiverse analysis has become a fairly popular approach, as indicated by the present special issue on the matter. Here, we take one step back and ask why one would conduct a multiverse analysis in the first place. We discuss various ways in which a multiverse may be employed – as a tool for reflection and critique, as a persuasive tool, as a serious inferential tool – as well as potential problems that arise depending on the specific purpose. For example, it fails as a persuasive tool when researchers disagree about which variations should be included in the analysis, and it fails as a serious inferential tool when the included analyses do not target a coherent estimand. Then, we take yet another step back and ask what the multiverse discourse has been good for and whether any broader lessons can be drawn. Ultimately, we conclude that the multiverse does remain a valuable tool; however, we urge against taking it too seriously.

New preprint! So, what's a multiverse analysis good for anyway?>

With @jessicahullman.bsky.social and @statmodeling.bsky.social

juliarohrer.com/wp-content/u...

04.02.2026 10:24 — 👍 172    🔁 52    💬 9    📌 3
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New paper by PD student Bob Kapteijns (not on bsky) How do reading, math, and various cognitive skills "grow together" in early childhood? 🧠📚
osf.io/preprints/ps...

30.01.2026 11:25 — 👍 22    🔁 8    💬 1    📌 0
Nine subcortical/cerebellar atlases included in the subcortex_visualization Python package (and subcortexVisualizationR package in R). The atlases are depicted in two-dimensional vector graphic format.

Nine subcortical/cerebellar atlases included in the subcortex_visualization Python package (and subcortexVisualizationR package in R). The atlases are depicted in two-dimensional vector graphic format.

The extended version of my thesis procrastination project/subcortex visualization package is out now in both Python and R, now that I’ve graduated 🤠 This figure shows the 9 atlases included (and counting)!

Preprint: www.biorxiv.org/content/10.6...
Website: anniegbryant.github.io/subcortex_vi...

27.01.2026 03:04 — 👍 111    🔁 46    💬 3    📌 5
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When two years of academic work vanished with a single click After turning off ChatGPT’s ‘data consent’ option, Marcel Bucher lost the work behind grant applications, teaching materials and publication drafts. Here’s what happened next.

When you think two years of running in the chatgpt hamster wheel is "academic work"

(via @mathijsvdsande.bsky.social)
www.nature.com/articles/d41...

22.01.2026 22:38 — 👍 23    🔁 4    💬 4    📌 2
A wintery scene of a small angel made of snow with a church in the backyard

A wintery scene of a small angel made of snow with a church in the backyard

A snowy canal with a watery sunrise

A snowy canal with a watery sunrise

Utrecht in snowy weather

05.01.2026 10:28 — 👍 48    🔁 2    💬 0    📌 1
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Representation in science and trust in scientists in the USA - Nature Human Behaviour Druckman et al. document gaps in trust in scientists in the USA. People from groups less represented among scientists (for example, women and those with lower economic status) are less trusting. Incre...

Paper out today in @nathumbehav.nature.com:

1) those groups (women, African Americans, lower SES, rural) that are underrepresented in science have been less trusting of science.

2) If you improve representation in science, you improve trust among those groups.

www.nature.com/articles/s41...

09.12.2025 04:21 — 👍 138    🔁 61    💬 3    📌 1
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I've used Lavaan almost every (work)day for 15 years, but this open source labour of love has never received proper institutional support. I'm delighted to be a small part of an 1.5M OpenScienceNL award, led by Jorgensen, to completely revamp and futureproof Lavaan www.openscience.nl/en/news/45-p...

18.12.2025 07:43 — 👍 267    🔁 62    💬 10    📌 6

Our paper on the ☀️ "summer slide" 🛝 is out now @pnas.org!
www.pnas.org/doi/10.1073/...
Summer slide is a replicable phenomenon across diverse datasets that's more than "forgetting" school material in vacation months, but effects of socioeconomic inequality are ➡️ 7x bigger! ⬅️
#PsychSciSky #DevPsy
🧵👇

16.12.2025 17:56 — 👍 124    🔁 51    💬 2    📌 6
Postdoctoral Researcher (2288) - Birkbeck, University of London Birkbeck

🚀 We're hiring !

🕵️ Seeking a postdoc to study the development & individual-level organization of brain circuits supporting (in)flexible behavior in psychiatric populations.

🧠 Precision functional mapping, fMRI, normative modelling

Details 👉 tinyurl.com/3h8tcv2e

🗓️ Apply by Dec 10! Please RT 🙌

06.11.2025 10:56 — 👍 35    🔁 28    💬 1    📌 2

The "smartphones/social media" discourse suffers from some amazing historical amnesia. There was no 2008 financial crisis and no global pandemic starting in 2020, it's all SCREENS SCREENS SCREENS. Major world events? Just the backdrop against which SCREENS happened.

15.12.2025 07:05 — 👍 262    🔁 57    💬 16    📌 3

An abbreviation (ABB) in a journal article (JA) or Grant Application (GA) is rarely worth the words it saves. Every ABB requires cognitive resources (CR) and at my age by the time I'm halfway through a JA or GA I no longer have the CR to remember what your ABB stood for.

15.08.2025 09:39 — 👍 402    🔁 123    💬 12    📌 22
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📚 What does "modern" #EducationResearch look like today?

@radboudumc.bsky.social's Rogier Kievit shares how the #LEVANTE initiative embodies a unique approach to human #CognitiveDevelopment—one that is both truly global & collaborative to its core.

Learn more 🔗 bit.ly/48CmPmU

#LearningVariability

26.11.2025 10:36 — 👍 1    🔁 2    💬 0    📌 0
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don't forget the Bicycle of Education

27.11.2025 08:02 — 👍 2    🔁 0    💬 0    📌 0

Congratulations Dave on steering AMPPS so successfully over the last few years, and teaching me and my fellow AE's a lot about the value of responsible, diligent and clear EIC leadership

27.11.2025 07:50 — 👍 4    🔁 0    💬 0    📌 0
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Good news straight from my IG feed:
"When asked to draw a scientist, school-age kids in the United States are increasingly sketching women, according to a study from 2018." ⁠(sciencemagazine)
Original article: srcd.onlinelibrary.wiley.com/doi/full/10....

24.11.2025 16:32 — 👍 9    🔁 3    💬 0    📌 0
Andrew R. A. Conway

Andrew R. A. Conway

Michael J. Kane

Michael J. Kane

PS is excited to announce the launch of "Individual Differences in Cognition” (IDIC), an open-access journal on research in cognitive psychology, science, and neuroscience. Co-Editors-in-Chief are Andrew R.A. Conway & Michael J. Kane. Manuscripts accepted this spring. More information coming soon!

22.11.2025 22:09 — 👍 80    🔁 40    💬 0    📌 2
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What does it mean to be both animal and thinker? Join @moatazassem.bsky.social and John Duncan on 25 November at Murray Edwards College for the launch of John’s new book ‘The Animal and the Thinker.’ Get your tickets here: www.eventbrite.co.uk/e/the-animal...

22.10.2025 10:04 — 👍 8    🔁 2    💬 0    📌 3

Beautifully written, funny, and important. Also ouch.

17.11.2025 19:01 — 👍 4    🔁 1    💬 0    📌 0
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Uncovering Asymmetric Temporal Dynamics Using Threshold Dynamics Parameters Statistical models to analyze longitudinal data often include parameters that capture temporal dependencies. These dynamics parameters are typically thought to operate independently of the time ser...

A confession - One co-author so disliked acronyms in structural equation modeling (for good reason) that I couldn't resist spending/wasting time coming up with 'DYNASTI' for this paper (DYNamics of ASymmetric TImeseries) www.tandfonline.com/doi/full/10....

14.11.2025 21:24 — 👍 2    🔁 0    💬 1    📌 0
Post image 14.11.2025 21:16 — 👍 3    🔁 1    💬 1    📌 2
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BREAKING: European Sleeper will start a Paris-Berlin sleeper train from 26 March 2026, after Nightjet pulls out in December.
It'll run via Brussels (with Eurostar connection from London) 3 times a week. This + existing train = Brussels-Berlin 6 times a week. www.europeansleeper.eu/paris

12.11.2025 07:16 — 👍 391    🔁 100    💬 7    📌 9

Very proud to have launched our manifesto and report to make Dutch academia more sustainable - a moment to celebrate after two years of hard work with the Green Young Academy, DJA and many inspiring colleagues

dejongeakademie.nl/en/news/3148...

05.11.2025 19:29 — 👍 24    🔁 7    💬 0    📌 0
Harvard Gazette:
Gazette: “You are the mother of two In ten years you have produced three novels and two short-story collections. Can you talk about your process and how you manage work and family?”
Groff: “I understand that this is a question of vital importance to a lot of people, particularly to other mothers who are artists trying to get their work done, and know that I feel for everyone in the struggle. But until I see a male writer asked that question, I am going to respectfully decline to answer it.”

Harvard Gazette: Gazette: “You are the mother of two In ten years you have produced three novels and two short-story collections. Can you talk about your process and how you manage work and family?” Groff: “I understand that this is a question of vital importance to a lot of people, particularly to other mothers who are artists trying to get their work done, and know that I feel for everyone in the struggle. But until I see a male writer asked that question, I am going to respectfully decline to answer it.”

05.11.2025 00:18 — 👍 2697    🔁 776    💬 29    📌 56
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Universities should be more ambitious in the climate transition, according to The Young Academy - De Jonge Akademie News

You can read both the manifesto and the report here: www.dejongeakademie.nl/en/news/3148... and some coverage in e.g. the @foliacivitatis.bsky.social here www.folia.nl/en/actueel/1...

04.11.2025 14:49 — 👍 6    🔁 3    💬 1    📌 0
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Years ago I started the Green Young Academy with @sanlifaez.bsky.social & @anne-urai.bsky.social. Across meetings, zoom calls, pitches and even a meeting with the King, this grew into 2 projects launched today: A report on Universities' sustainability plans & a manifesto with sustainability pledges

04.11.2025 14:44 — 👍 19    🔁 5    💬 1    📌 1
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Universities should be more ambitious in the climate transition, according to The Young Academy - De Jonge Akademie News

Proud to share our manifesto - with a vision and concrete steps towards just sustainability transitions in Dutch academia!

With @rogierk.bsky.social, De Jonge Akademie, Green Young Academy

www.dejongeakademie.nl/en/news/3148...

04.11.2025 11:43 — 👍 12    🔁 4    💬 0    📌 0

I have a vivid but possibly made up memory of paper(s) showing that dual task interference is greater if the same task is done under high time constraints vs low/no time constraints. Any pointers come to mind?

20.10.2025 06:59 — 👍 2    🔁 1    💬 0    📌 0

Gather round, all those bayes curious, pragmatic, committed or indifferent, for an elegant and flexible way to approach reliability estimation using bayesian measurement models! All thoughts and ideas welcome

01.10.2025 10:22 — 👍 24    🔁 7    💬 1    📌 0

I've been an AE at AMPPS for almost 5 years so happy to answer any questions - It's a fantastic opportunity to help shape methodological innovation and dissemination (and get the first glimpse of exciting new work!)

30.09.2025 13:29 — 👍 5    🔁 2    💬 0    📌 0

@rogierk is following 20 prominent accounts