Lena Hahn

We're organizing an EASP small group meeting on counterfactuals in March 2026. More details can be found here:
www.easp.eu/news/itm/eas...

Do you sometimes feel torn when making decisions, like whether to eat unhealthy food or recycle? This is called felt ambivalence: a psychological discomfort from having mixed feelings about something. Check out our new work to know how people resolve such conflicts: doi.org/10.1016/j.je... 🧠💥 1/10

Flexibility mindsets enhance pro-environmental behavioral intentions among those with a low pro-environmental default tendency Environmental psychology provides several promising approaches to enhance pro-environmental behavior. However, these are usually only effective within…

New paper alert: @kwinter.bsky.social Laura Henn, and I show in 3 studies (N = 1005) that flexibility mindsets (induced by cognitive conflicts) enhance pro-environmental behavioral intentions among those initially low in pro-environmental attitudes.

www.sciencedirect.com/science/arti...

Doctoral Researcher (m,f,x)

🚨 We’re hiring! 🚨
The Social&Environmental Psychology Group @ruhr-uni-bochum.de is recruiting 2 PhDs and 1 Postdoc
as part of the ERC-funded SUSCON project on sustainable consumption.

Details here:

PhDs:👉 jobs.ruhr-uni-bochum.de/jobposting/7...

Postdoc:👉 jobs.ruhr-uni-bochum.de/jobposting/e...

I'm looking forward to giving a keynote at the PMGS Meta Research Symposium 2025, where I will talk about my meta-scientific work on preregistration and and my experiences of being part of the open science movement as an early career researcher!✨ #OpenScience @zpid.bsky.social

Meta Research Symposium 2025 PMGS PMGS Meta Research Symposium 2025 16-17 October 2025, TU/e Eindhoven Conference website: https://paulmeehlschool.github.io/workshops/ Program Day 1 - Pre-Symposium Mini-Workshop Time Activity…

The full program for the PMGS Meta Research Symposium 2025 is online: docs.google.com/document/d/1... If you are interested in causal inference, systematic review, hypothesis testing, and preregistration, join is October 17th in Eindhoven! Attendance is free!

Excited to announce that my paper with @lpummerer.bsky.social, @sonja-utz.de & @kaisassenberg.bsky.social on conspiracy beliefs is published. We examined the relationship between conspiracy beliefs and procedural justice during the peak and decay of the pandemic.

53% of preregistrations included all procedural specifications & 10% all transparency elements. The completeness of preregistration was unrelated to JIF and TOP Factor of the journal in which the preregistered study was published. We discuss how the completeness of preregistrations can be improved.

We used @zpid.bsky.social PSYNDEX database to sample preregistrations from articles published by psychologists from institutions in German-speaking countries in 2020. We coded 6 procedural specifications (e.g., planned sample size) & 6 transparency elements (e.g., sample size justification)

A Cross-Sectional Study of the Completeness of Preregistrations by Psychological Authors From German-Speaking Institutions - Lena Hahn, Andreas Glöckner, Mario Gollwitzer, Jens Hellmann, Jens Lange, S... Preregistering confirmatory research aims at reducing researchers’ degrees of freedom and increasing transparency to ultimately increase replicability. Yet the ...

How complete are preregistrations?

Short answer: 53% include all 6 procedural specifications

Medium answer: 🧵

Long answer: check out my publication with A. Glöckner @mariogollwitzer.bsky.social J. Hellmann, J. Lange, S. Schindler & @kaisassenberg.bsky.social

doi.org/10.1177/2515...

I’m excited to share my first first-authored paper with @abitter.bsky.social in the Journal of Happiness Studies:

“The Emotional Climate of Academia: Exploring Social Media Data as an Indicator of Well‑Being.”

📖 Read it here (OA): link.springer.com/article/10.1...

Am 14. September gibt es in Bochum eine Abendrevue zu Verschwörungserzählungen, die ich mit @pialamberty.bsky.social und @lpummerer.bsky.social gestalte unter Mitwirkung von @tobiasrothmund.bsky.social und sekten-info-nrw.de. Tickets sind begrenzt und unter dem Link bestellbar.

Victims of Conspiracies? An Examination of the Relationship Between Conspiracy Beliefs and Dispositional Individual Victimhood Conspiracy beliefs have been linked to perceptions of collective victimhood. We adopt an individual perspective on victimhood by investigating the relationship between conspiracy beliefs and the indi....

🚨 Fresh off the press 🚨 Our #TISP spin-off paper on the relationship between #ConspiracyBeliefs and individual #victimhood is now out! doi.org/10.1002/ejsp...
1/8 🧵

Fresh of the press! I'm incredibly proud of this new paper by Kiki Vu and myself where we show how much bias is introduced when people use workarounds to test interaction hypotheses meta-analytically. Check it out: advances.in/psychology/1...

The Paul Meehl Graduate School Meta Research Symposium 2025 is on October 17. Keynote speakers are @uyguntunc.bsky.social and @lspitzer.bsky.social. The symposium is free to attend for everyone - also if you are not a PhD student. And will soon announce an extra workshop the afternoon of the 16th.

Today, my dear colleague @annameret.bsky.social presented our work on data sharing in psychology at @icssi.bsky.social ✨We show that open data is findable, but less reusable.
Preprint coming soon, preregistration available on PsychArchives: doi.org/10.23668/psy...

#Metascience #SciSci #ICSSI2025

PCI Psychology is here!! 🎉🥳

After over a year of hard work by so many people, we are thrilled to announce that we are open for submissions! Join us in making publishing more efficient, equitable, and open: psych.peercommunityin.org
#PsychSciSky #scipub

Mapping, understanding and reducing belief in misinformation about electric vehicles - Nature Energy Across four countries, more people agree with misinformation statements about electic vehicles than disagree with them, and conspiracist mentality is the strongest predictor of this agreement. Interac...

🥳New paper on belief in #misinformation about electric vehicles led by Chris Bretter w Sam Pearson, Matthew Hornsey, Belinda Wade & Kevin Winter out in @natenergy.nature.com. Conspiracy beliefs are the strongest predictor and #ChatGPT helps to reduce belief in misinformation
doi.org/10.1038/s415...

Whom do we want to see in power? People high in both benevolence and integrity - that's what a new paper by Annika Scholl, H Rapp, Gerben van Kleef and myself shows. 4 Studies (N=1151) provide consistent evidence for this interaction effect. Delighted to see this work out doi.org/10.1037/xap0...

New preprint! We meta-analyzed data from 1,114 studies to identify the strongest correlates of migrants' adaptation to living abroad. Co-authored by Kiki Vu, George Tong, Mike Cheung, Nora Benningstad, Evita van Duin, Karine Lindholm, Colleen Ward, and @kunstjonas.bsky.social
osf.io/preprints/ps...

Call for submission: Paul Meehl Graduate School Meta Research Symposium 2025 | Paul Meehl Graduate School We are delighted to announce the second round of the Paul Meehl Graduate School’s Meta-Research Symposium, which will kick off...

Call for submissions: Paul Meehl Graduate School Meta Research Symposium 2025!

October 17, 2025, at Eindhoven University of Technology

Keynotes: Dr. Duygu Uygun-Tunç and Dr. Lisa Spitzer

ECR's: Submit your talk before 31st of June!

paulmeehlschool.github.io/2025-05-26-p...

📢 Our colloquium series continues!

🗓 Wednesday, May 21, 2025
🕑 2:00–3:00 PM (CET)
🎙 Dr. Daniel Toribio-Flórez, will speak in English about:

"Consequences of conspiracy beliefs for interpersonal relationships"

📍 on-site or online: all details here👉 leibniz-psychology.org/en/products/...

Ahhh, so excited to participate at #SIPS2025 Online!😍 Tomorrow, I'll host the hackathon "Community Testing of ZPID’s Preregistration Platform PreReg”, which I'm looking forward to a lot!✨ #OpenScience @zpid.bsky.social

📣very thrilled to see the new, open access (!) edition of the Handbook of Social Psychology is now online! With 50 chapters, this is an amazing collective effort brought to everyone by @danielgilbert.bsky.social, Susan Fiske, @elijfinkel.bsky.social, and Wendy Mendes and Situational Press. 👏🎉🙏

Cover of the Handbook of Social Psychology 6th edition 2025

Since 1954, "The Handbook of Social Psychology" has been the field’s most authoritative reference work, and today is the launch of the 6th edition with 50 new chapters by 100 leading scholars. Best news? The HSP is now an open-access public resource—free to read, download, and share. the-hsp.com

New article out in the Journal of Environmental Psychology led by @kwinter.bsky.social (with @lpummerer.bsky.social Matthew Hornsey & Timo von Oertzen) showing that conspiracy mentality and wind farm opposition mutually predict each other over time.
www.sciencedirect.com/science/arti...

Daniel’s visiting us at @zpid.bsky.social next week! 🥳 We’ll stream his talk on conspiracy beliefs and relationships and you’re welcome to join - please reach out to us for the link.

bsky.app/profile/kais...

⏰ Last Chance to Apply! Only 5 Days Left! ⏰
📅 Apply by: May 18th, 2025

💥Save the date!💥

On June 3, we will be there again and have answers to psychological topics.

📅Choose your topic and book your appointment now!

#BookAScientist #Psychology #AI #OpenScience #KLARpsy #ZPID

@leibniz-gemeinschaft.de

www.leibniz-gemeinschaft.de/ueber-uns/ne...