André Bittermann

Reference limits can exacerbate biased citation behavior! In my current commentary article on the work of @kaileylawson.bsky.social, @brettmurpsych.bsky.social, et al. (2025), I provide empirical support for this thesis. Now published #OA @collabrapsychology.bsky.social 👉 doi.org/10.1525/coll...

Come to work with me! I am looking for a PhD researcher (f/m/d) for a 4-year research project on the impact of negative emotions on the formation of conspiracy beliefs - considering appraisals theories and emotion regulation. Ideal starting: 03/27 leibniz-psychology.onlyfy.jobs/de/job/snmy3...

I'm so so so excited that we at @zpid.bsky.social will host #SIPS2028! The SIPS conference was one of the first contacts I ever had with #OpenScience & influenced my decision to start my academic career greatly. See you in 2028 in Trier, Germany!🥰

Come work on a PhD in Metascience with me! There’s just a little over one week left to apply!

New preprint! 🎉 I analysed 1660 papers from 4 psychology journals and found materials sharing went from 9% of papers in 2015 to 82% in 2025, and these materials *do* get downloaded — a median of 135 times each. BUT shared code is often hard to run. doi.org/10.31234/osf... Let's walk through it 🧵

And if you want to see how your OSF repos compare against this corpus in terms of usability try my OSF reusability checker app. This app also provides tips if it flags any potential issues dsquintana.shinyapps.io/osf-reusabil...

As #AI’s capabilities grow, researchers and publishers are exploring how it can support peer review—and where it still falls short. Learn more during #PeerReviewWeek: https://scim.ag/4y267b6

Article now retracted. Retraction notice focuses on data sharing, but doesn't mention - the ethics review body is the author's own company - the tech used to to collect the data by intercepting users' LLM prompts does not exist ht @grinschglsandra.bsky.social psycnet.apa.org/fulltext/202...

What a nice final to our #bibliometrics project on digital prompting in education: My dear Leibniz colleague Jasmin Breitwieser from @dipfaktuell.bsky.social and I presented our work at #DGPs2026! Today, we focused on our paper identification workflow. Paper in EDPR: 👉 doi.org/10.1007/s106...

Finally, at #DGPs2026, our very competent intern Amelie Kröger presents bibliometric analyses (with @abitter.bsky.social) showing that #SciComm research has become increasingly dynamic and responsive to societal challenges over the years. Psychology‘s role in this field is growing. 📣 #SciReLab

„Populist politics as a threat to academic freedom - Where do we stand?“ 🙌🏼 So important, to discuss! Currently on the panel: @kaisassenberg.bsky.social @lenahahn.bsky.social @lewan.uk Dieter Frey & G.-Jürgen Hogrefe @dgps.bsky.social #DGPs2026 #zpid @unitrier.bsky.social

1/ What is the prevalence of personally identifiable information (PII) in author-collected data publicly shared in the social sciences? We audited 327 replication packages from 11 leading journals in economics, political science, and psychology Answer: surprisingly high 🧵

I’m hiring a PhD student to work with me on metascience in psychology at @zpid.bsky.social! The position is very open - could cover a wide range of topics/themes 🤸🏻‍♀️✨ If you have questions, please reach out! Applications are open until October 1st. leibniz-psychology.onlyfy.jobs/en/job/fyjwt...

Excited and looking forward to the panel discussion with @kaisassenberg.bsky.social @evalottabrakemeier.bsky.social @rimamrahal.bsky.social @lewan.uk & G.-J. Hogrefe on populist politics as a threat to academic freedom at #DGPs2026 📆Wednesday, 9 September, 🕧1:45PM, 📍 Room Plenary 1 #psychscisky

It was not only an honor, but also so much fun to supervise this outstanding phd student! @cspetrule.bsky.social presents a unique mix of #SciSci and #Translational #PsychotherapyResearch. His thesis will be soon available online, incl. a framework for property-based assessment of research fields

New Blog post: Which Data Repository Should you Use? In light of OSF closing down, I compare Zenodo, Dataverse, ResearchBox, PsychArchive, and local repositories on six important dimensions. If you want to know which to pick: It depends! daniellakens.blogspot.com/2026/08/whic...

While the OSF remains the market leader on preregistrations, there are numerous tools that I can highly recommend for other parts of the research process. Here is a brief overview. I’m happy about suggestions!

Together with @forrt.bsky.social, we’re building community-driven, consensus-based best-practice guidelines for #psychology, starting with #preregistration! More info: forrt.org/best-practic... Join the project (e.g. our preregistration sub-task force) here: forms.gle/2h4XPX3wQqZ6... #OpenScience

Zum Kick-Off von psychporta.org, dem brandneuen Suchportal von @zpid.bsky.social für Psychologie-Forschungsobjekte, gab ich eine kurze (und der Hitzewelle angepasste) Keynote zur Rolle von #Metascience und #Metadata in Zeiten der #Informationskrise mediacenter.leibniz-psychology.org/view?m=H15gd...

Very excited to announce that I’ll be joining @zpid.bsky.social in Trier, Germany as a tenure-track Jun.-Prof. in Psychological Metascience in November! 🤸🏻‍♀️✨

Now @lenazohm.bsky.social shares her research on expert trespassing: people do - at least somewhat - recognize it when scientists transgress the boundaries of their expertise and this might lead to (small) losses of trust. #SciReLab

Had a great time presenting my current work on epistemic injustice and trust in science at my first #EASP2026. Thanks for all the feedback! Happy to be part of the conference!

Bringing together psychology of science, computational methods, and social psych to explain how social influence spreads within academic (online) communities: It’s not so much single academic influencers but the community that drives change. Great talk by @abitter.bsky.social at #EASP2026! 🤓

How to give a bad talk www.nature.com/articles/s41...

🚨JOB ALERT🚨 3 YEAR POSTDOC in #SciComm research at @zpid.bsky.social! @kaisassenberg.bsky.social and me are searching for a postdoc with background in psychology or communication science. Own research ideas are welcome! Focus should be on societies' preparation for future pandemics. Please share!

⚡ Metaventory: building better science ⚡ Had many discussions about the need for mapping out all that's meta-science: people, tools, events, jobs, simulations, etc. in one place. Metaventory aims to help connect those interested in meta-science & improving science. metaventory.vercel.app

I’ve officially resigned as Associate Editor for Frontiers in Systems Neuroscience. It used to be a reputable journal, but became a case study in how forced automation destroys academic integrity. 👇

Join our Mini-Hackathon and help us draft community-driven best-practice guidelines for preregistration!✨ 🗓️ Friday, June 5, 4-6 PM CET 📍 Zoom Register by indicating your interest in participating in the #prereg community events here: forms.gle/yrmK8Wnd4oqw... @zpid.bsky.social @forrt.bsky.social

Generative AI and LLMs are rapidly transforming research, and psychological scientists are figuring out how to use them responsibly. Here are nine articles from AMPPS that offer practical tutorials, frameworks, and cautionary insights for researchers. #AI #AcademicSky

🚨THREATENED BY SCIENCE🚨People often reject science at odds with their prior beliefs. In three studies, we now show that much of this can be explained by feelings of threat and we test how affirmations in #SciComm might help alleviate such threats. Now out in Public Understanding of Science! 🧵1/4

Excited and looking forward to the symposium with @kaisassenberg.bsky.social & @marlephie.bsky.social on Transparency in the Research Cycle at #APS26BCN. If you are interested in #openscience and #metasci save the date: 📆Firday, 29 May, 🕧12:30PM, 📍 Room 125 (P1 Level, CCIB) #psychscisky

A clear gap in "#GenAI for learning" applications is a failure to understand scaffolding and the role of digital prompts in promoting not just knowledge but also agency internalization. This article has a helpful framework for bridging this gap. #GenAI companies would learn much from this article.

Tomorrow at Online #SIPS2026, I'll be presenting a bibliometric case study of two top-tier psychology journals, indicating effects of reference limits on citation diversity. How to ensure both accuracy and inclusiveness in referencing? I'll pitch an idea. 🕗May 6 | 08:45 AM (EDT) | 14:45 (Berlin)

Selecting an effect size for power analysis is hard. Many researchers fall back on Cohen's thresholds, but they have no empirical basis and vary wildly by field. Our new paper offers a better option: field-specific effect size distributions built from meta-analytic data doi.org/10.3758/s134...

Come join me and others at this year’s interdisciplinary and international metascience summer school (Aug 23-28, deadline May 22)! Looking forward to collaborate! 🤓