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Sebastian Stier

@sebstier.bsky.social

930 followers 240 following 28 posts

Professor of Computational Social Science @University of Mannheim & Scientific Director Department Computational Social Science @GESIS https://sebastianstier.com

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Communication & Media Studies 39%

Political science 30%

Posts Media Videos Starter Packs

Reposted by Sebastian Stier

GESIS - Leibniz-Institut für Sozialwissenschaften @gesis.org · 11h

#ASConference25
Societal Challenges and the important infrastructures for the Social Sciences on the way to get answers. Sebastian Stier shows how to unlock digital behavioral data.

as25.sociology.uni-m...

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Reposted by David Lazer, Will Jennings, Efrén O. Pérez , and 5 more David Lazer, Will Jennings, Efrén O. Pérez, Calvin K. Lai, Ryan Enos, Andrew L. Whitehead, Leticia Bode, Sebastian Stier

Tiago Ventura @tiagoventura.bsky.social · 2d

How common are “survey professionals” - people who take dozens of online surveys for pay - across online panels, and do they harm data quality?

Our paper, FirstView at @politicalanalysis.bsky.social, tackles this question using browsing data from three U.S. samples (Facebook, YouGov, and Lucid):

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Reposted by Alexander Wuttke, Sebastian Stier

Andreas Jungherr @ajungherr.bsky.social · 3d

🧵 New publication: How do people feel about regulating #AI in election campaigns? 🧵

In a new article, @adrauc.bsky.social, @kunkakom.bsky.social, and I examine when and why people support stronger AI regulation in political competition.

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

👇

Explaining public preferences for regulating Artificial Intelligence in election campaigns: Evidence from the U.S. and Taiwan

The increasing use of Artificial Intelligence (AI) in election campaigns, such as AI-generated political ads, automated messaging, and the widespread …

www.sciencedirect.com

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Reposted by Ingmar Weber, Katrin Weller

Sebastian Stier @sebstier.bsky.social · 7d

📢 We're hiring a Doctoral Student in Research Software Engineering for Digital Behavioral Data!
Work at the intersection of computer science and social science, develop innovative tools, and pursue your doctoral degree with us.

👉 Apply here: www.gesis.org/en/institute...

Details

GESIS Leibniz Institut für Sozialwissenschaften

www.gesis.org

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Reposted by Sebastian Stier

Katrin Weller @kwelle.bsky.social · 8d

Social-Media-Daten zwischen Forschung und Infrastrukturen - nachhaltige Archivierung, Erschließung und Bereitstellung: An der @dnb-aktuelles.bsky.social finden vom 17.-19.03.2026 die Social Media Access Days statt. Wir freuen uns über Einreichungen bis zum 31.10.2025. www.dnb.de/DE/Professio...

Call for Submissions: Social Media Access Days

www.dnb.de

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Reposted by Hajo G. Boomgaarden, Alexander Wuttke, Johannes Breuer , and 1 more Hajo G. Boomgaarden, Alexander Wuttke, Johannes Breuer, Sebastian Stier

MEDem @medem.bsky.social · 12d

They say: once there’s a paper 📝, it’s real…
🎉 #MEDem in #EPS @ecpr.bsky.social

The paper outlines how MEDem will strengthen #OpenScience by making data #FAIR in #DemocracyResearch – and how scholars across Europe are joining forces to build a truly open #ResearchInfrastructure ⚙️

Screenshot of the article “Open science in democracy research: the research infrastructure ‘Monitoring Electoral Democracy’ (MEDem)” published in European Political Science. The header shows the journal name, DOI link, and the label “DEBATE.” Below, the title is followed by the author list: Hajo Boomgaarden, Alexia Katsanidou, Sylvia Kritzinger, Georg Lutz, Johanna Willmann, and Jakob-Moritz Eberl. The abstract explains the aims of MEDem as a European research infrastructure to make democracy research data FAIR (findable, accessible, interoperable, reusable). Keywords listed include open science, FAIR data, ESFRI roadmap, research infrastructure, democracy research, data harmonization, data linking, and data set search. DOI: https://doi.org/10.1057/s41304-025-00534-8

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Reposted by Damian Trilling, Sebastian Stier, Florian Keusch

Heinz Leitgöb @heinzleitgoeb.bsky.social · 17d

Thrilled to share: our Special Issue in Social Science Computer Review (@sscratsage.bsky.social) on digital behavioral data quality is out now. Many thanks to all contributing authers and my co-editors @clauwa.bsky.social and Bernd Weiß:
journals.sagepub.com/doi/10.1177/...

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Reposted by Sebastian Stier

GESIS Panel @gesis-panel.bsky.social · 17d

Join the GESIS Panel.dbd Insight Days on February 23–24, 2026 in Mannheim! Learn about fundamentals and best practices for working with the GESIS Panel.dbd and get exclusive access to a closed Call for Study Proposals only for workshop participants!

www.gesis.org/en/gesis-pan...

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Reposted by Sebastian Stier

Lukas Otto @lukotto.bsky.social · 21d

Here is a list that @juliankohne.bsky.social Mareike Wieland, Charlotte de Alwis, and I started a while ago:

toolreview.shinyapps.io/adapted_app/

EMA Tool Collection <div style="display: flex; align-items: center;"></div>

toolreview.shinyapps.io

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Reposted by Sebastian Stier

Juhi Kulshrestha @juhi153.bsky.social · 22d

We are hiring multiple PhD and postdocs for two newly funded projects at the intersection of mental health and political polarization at the CS Dept at Aalto, Finland. The PIs are Juhi Kulshrestha, Talayeh Aledavood, and Mikko Kivelä.

Full call text and link to apply: www.aalto.fi/en/open-posi...

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Reposted by Sebastian Stier

Alexia Katsanidou @alexiakatsanidou.bsky.social · Sep 2

Are you a student in Cologne or near by? Here are some great opportunities to support our computational social science team: [SHK GESIS AppKit (Kennziffer SHK-CSS-32)] www.gesis.org/institut/kar...
[SHK GESIS Web Tracking (Kennziffer SHK-CSS-33)] www.gesis.org/institut/kar...

Details

GESIS Leibniz Institut für Sozialwissenschaften

www.gesis.org

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Reposted by Andrew K Przybylski, Johannes Breuer, Sebastian Stier

Center for Advanced Internet Studies @cais-research.bsky.social · Sep 1

🎉 As of today, September 1, 2025, Prof. Dr. Johannes Breuer heads the "Research Data & Methods" team at CAIS. Together with the University of Duisburg-Essen, he has been appointed Professor of Digital Social Sciences. 🎉
🔗 www.cais-research.de/en/news/joha...
@johannesbreuer.com @unidue.bsky.social

Portrait of Johannes Breuer + Text "Prof. Dr. Johannes Breuer,
New Professor & Head of the Team Research Data & Methods at CAIS"

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Reposted by Sebastian Stier

GESIS Panel @gesis-panel.bsky.social · Aug 26

The new GESIS Panel.dbd Digital Behavioral Data Sample offers for the second time the opportunity to submit studies: www.gesis.org/en/gesis-pan...

Accepted proposals will be fielded in 2026

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Reposted by Sebastian Stier

Jürgen Maier @maierjuergen.bsky.social · Aug 20

New study with Michaela Maier, Lea Gorski & Felix Schmidt! Using web-tracking and experience sampling data we show that German voters are equally exposed to positive and negative information; however the exact relevance varies across channels and methods of data collection.

doi.org/10.1177/1077...

Beyond a Negativity Bias: Explaining the Consumption of Positive and Negative Political Information Using WebTracking and Experience Sampling Data - Michaela Maier, Jürgen Maier, Lea C. Gorski, Felix ...

Negativity and positivity are crucial in political information, yet research often overlooks positive content consumption. This study examines the degree to whi...

doi.org

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Reposted by Sebastian Stier, Stuart J. Turnbull‐Dugarte

Constantin Wurthmann @wurthmann.bsky.social · Aug 13

📢 New Publication Alert!
Our (@msaeltzer.bsky.social)
latest article, "Issue congruence between candidates' Twitter communication and constituencies in an MMES: Migration as an exemplary case", has just been published in Parliamentary Affairs.
academic.oup.com/pa/advance-a...

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Reposted by Sebastian Stier

Felix Schulte @felixschulte.bsky.social · Aug 8

🔍 What triggers anti-minority violence?

📌 In @europeansocreview.bsky.social, we show that soldier funerals as nationalist spectacles increase the likelihood of spontaneous retributive violence against minority members.

📖 doi.org/10.1093/esr/...

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Reposted by Emilio Zagheni, Katrin Weller, Johannes Breuer , and 1 more Emilio Zagheni, Katrin Weller, Johannes Breuer, Sebastian Stier

GESIS - Leibniz-Institut für Sozialwissenschaften @gesis.org · Aug 4

#jobs #stellenangebote #GESISjobs #jobfairy
🎓 Join GESIS Cologne as a #Postdoc in Platform Data & Computational Social Science!
💻 Work internationally, shape DSA data access, and develop your research.
Apply now:
www.gesis.org/en/ins...

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Reposted by Kai Arzheimer, Jason Reifler, Sebastian Stier , and 1 more Kai Arzheimer, Jason Reifler, Sebastian Stier, Cornelius Puschmann

Katrin Weller @kwelle.bsky.social · Jul 29

*JOB* join us at @gesis.org to work on new approaches for making data from online platforms usable for (computational) social science. Feel free to reach out to @sebstier.bsky.social or me for details about this position.

Sebastian Stier @sebstier.bsky.social · Jul 29

🚀 New postdoc position for Platform Data & Computational Social Science
Join us to drive @gesis.org' efforts around the Digital Services Act (DSA) and conduct research with online platform data
💼 TV-L EG 14 | Location: Cologne
📌 Apply now: www.gesis.org/en/institute...
#DSA #CSS #DataScience

Details

GESIS Leibniz Institut für Sozialwissenschaften

www.gesis.org

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Reposted by Alexander Wuttke, Katrin Weller, Johannes Breuer , and 2 more Alexander Wuttke, Katrin Weller, Johannes Breuer, Florian Keusch, Cornelius Puschmann

Sebastian Stier @sebstier.bsky.social · Jul 29

Details

GESIS Leibniz Institut für Sozialwissenschaften

www.gesis.org

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Reposted by Sebastian Stier

Jürgen Maier @maierjuergen.bsky.social · Jul 28

New research with @sebstier.bsky.social and @monadian.bsky.social. Triangulating turnout data at the constituency level and candidate surveys we find that negative campaigning has a mobilizing effect in German state elections.

doi.org/10.1080/2474...

Negative campaigning and electoral mobilization: empirical evidence from German state elections

Recent research has been inconclusive about the systemic effects of negative campaigning. The available studies, most of which focus on the United States, either conclude that attack behavior decre...

doi.org

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Reposted by Katrin Weller, Sebastian Stier

GESIS - Leibniz-Institut für Sozialwissenschaften @gesis.org · Jul 8

#Forschungsinfrastruktur #mitGESISindieZukunft
GESIS ist mit dem Konzept #RIDLOP auf der Shortlist für das nationale Priorisierungsverfahren für Forschungsinfrastrukturen!

Ziel: Datenzugang zu großen Online-Plattformen für die Wissenschaft ermöglichen.

Mehr zum Projekt: www.gesis.org/ridlop

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Reposted by André Melzer, Sebastian Stier

Johannes Breuer @johannesbreuer.com · Jul 25

2 new job opportunities at the @cais-research.bsky.social:
- PhD student, team "Research Data & Methods" stellenangebote.cais-research.de/de?id=f50b76
- Researcher, DFG project "SocEnRep - Automation of Reproducibility in Economics and Social Sciences" stellenangebote.cais-research.de/de?id=f50b76

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Reposted by Stefan Müller, Fabio Giglietto, Sven‐Oliver Proksch , and 1 more Stefan Müller, Fabio Giglietto, Sven‐Oliver Proksch, Sebastian Stier

GESIS - Leibniz-Institut für Sozialwissenschaften @gesis.org · Jul 17

#jobs #stellenangebote #GESISjobs #jobfairy
Job Opening! We're seeking a Postdoc in Computational Social Science to join our team at GESIS! Apply now:

www.gesis.org/en/ins...

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Reposted by David Lazer, Ruth Dassonneville, Dave O’Brien , and 11 more David Lazer, Ruth Dassonneville, Dave O’Brien, Maarten Vink, Kai Arzheimer, Jane Green, Markus Wagner, Michelle Dion, Sven‐Oliver Proksch, Katrin Weller, Johannes Breuer, Marco Albertini, Sebastian Stier, Maria Sobolewska

Alexia Katsanidou @alexiakatsanidou.bsky.social · Jul 16

🚨 We're hiring!
Join our CSES Team @gesis.org Cologne as a Senior Researcher. If you’re into comparative electoral research and love diving into data, this is your moment.
Come shape global democracy with us! 🌍📊
www.gesis.org/en/institute...

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Reposted by Sebastian Stier

Katrin Weller @kwelle.bsky.social · Jul 8

The German Federal Ministry of Research, Technology and Space announced their shortlist for their prioritization process for large research infrastructures - and we are on it! So keeping fingers crossed that we can build RIDLOP - Research Infrastructure for Data from Large Online Platforms soon.

GESIS - Leibniz-Institut für Sozialwissenschaften @gesis.org · Jul 8

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Reposted by Jürgen Maier, Sebastian Stier

Cornelius Puschmann @cbpuschmann.bsky.social · Jun 27

Why do people search for individual politicians? Because they (don't) like them. In a new paper we find sympathy/antipathy to be important predictors of political information seeking. We also find searches for female politicians more often concerned with appearance & family. doi.org/10.1177/1461...

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Reposted by Serge Guimond, Katherine Ognyanova, Erika Franklin Fowler , and 1 more Serge Guimond, Katherine Ognyanova, Erika Franklin Fowler, Sebastian Stier

David Lazer @davidlazer.bsky.social · Jun 23

We just posted an interactive on changes in approval for Trump from right before he was inaugurated to the present. We have very large samples (30k), and the interactive allows you to look at changes within very small slices of the public.

www.chip50.org/blog/whose-a...

Whose approval/disapproval of Trump has shifted the most?

www.chip50.org

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Reposted by Jürgen Maier, Sophie Lecheler, Sebastian Stier

Alessandro Nai @alessandronai.bsky.social · Jun 16

Our new book THE PSYCHOLOGY OF ATTACK POLITICS is out next month! 🔥📚

We offer a new look at negativity effects, via perceptions & evaluations🤔😱👿🤣

You can pre-order it with a nice 20% discount on the cover price (for paperbacks this makes it £32 or so)

Check out discount code & link in the flyer 👇

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Reposted by Johannes Breuer, Sebastian Stier

Jan Karem Höhne @jkhoehne.bsky.social · Jun 16

Attention please‼️Join the next CS3 Meeting this Wednesday (15:15-16:00 CEST). @johannesbreuer.com (@gesis.org) talks about research ethics and digital data. Sign up by tomorrow evening⬇️

ww3.unipark.de/uc/cs3_meeti...

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Reposted by Sebastian Stier

Nature Human Behaviour @nathumbehav.nature.com · Jun 10

Goel et al. examine why some factually correct news articles are often shared alongside fake news claims on social media. @pranavgoel.bsky.social @jongreen.bsky.social @davidlazer.bsky.social
www.nature.com/articles/s41...

Using co-sharing to identify use of mainstream news for promoting potentially misleading narratives - Nature Human Behaviour

Goel et al. examine why some factually correct news articles are often shared by users who also shared fake news articles on social media.

www.nature.com

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