Opinion Formation

The “Opinion Formation” research group investigates how people can form their own independent opinions and what is required to make this possible on the part of lawmakers, society, the media, and online platforms.

Public opinion does not emerge in a single place or through a single actor. It emerges from a complex interplay among citizens, the media, platforms, politics, academia, civil society, businesses, and, increasingly, automated systems.

All of these actors pursue different goals, operate under different conditions, and influence in various ways which issues gain visibility and how they are evaluated.

Digitalization, platformization, and the use of artificial intelligence are raising classic questions about the democratic public sphere anew.

  • What is needed for people to form opinions freely and with full knowledge of the facts?
  • How do platforms change the visibility of information?
  • What are the consequences of disinformation, misinformation, and targeted manipulation?
  • And what responsibilities do the media, platforms, the state, and society bear?

Photo by Annie Spratt/Unsplash

Overview

Last update: 24.09.2026

Blog Articles, News, Projects, Publications, Podcast Episodes

Cover der Zeitschrift Computational Communication Research_Teaser
Open Access

How Document Sampling and Vocabulary Pruning Affect the Results of Topic Models

In the new issue of the journal Computational Communication Research, Dr. Gregor Wiedemann writes together with three other authors about how Topic Modeling could be simplified. This article answers the question whether and how Topic Models can be calculated reliably and without quality loss on smaller samples for the analysis of the population.

Publikation "
Journalistic Coverage of COVID-19

Ethnographic Insights into the Science Media Center and Its Response to the COVID-19 Outbreak

In einer Sonderausgabe des Journal of Science Communication, die sich ausschließlich mit der Kommunikation im Zusammenhang mit COVID-19 befasst, schreibt Irene Broer über die interredaktionelle Reaktion des Science Media Center Germany (SMC) auf den Ausbruch der Pandemie.

Six stylized figures in a video conference window with one figure highlighted in a different color and icons for microphone, camera, participants, chat, and more below.
Blogpost

Who is Zoom to Judge?

Why Engaging in Content Governance is Not a Good Idea for the Successful Video Conferencing Platform.

Cover
Contribution to Anthology

Taking Ingolf Pernice Seriously

In the anthology "Don't Give Up, Stay Idealistic and Try to Make the World a Better Place. Liber Amicorum for Ingolf Pernice", Matthias C. Kettemann describes how the legal scholar Ingolf Pernice has influenced his research on normative order and what normative order on the Internet is all about.

Cover
Accompanying Text to Paul Celan

Of the Strange Celan Sound and an Art-Creating Poetry Voice

Paul Celan is one of the most important German-speaking poets and had a very special way of reciting his poems. In this compilation, the original recordings can be heard for the first time. For this occasion, Hans-Ulrich Wagner has written a detailed accompanying text with background information on Celan's life, work and recitations.

Cover
Article Online

Brainwashing the Germans through Radio Plays?

Was the radio play used for political propaganda? Hans-Ulrich Wagner looks into this in his article in the journal 'Medienkorrespondenz' [Media Correspondence].

Cover
Human Rights Online

Freedom of Expression and the Internet

In this book Matthias C. Kettemann and Prof. Dr. Wolfgang Benedek discuss the importance of human rights on the Internet - especially the right to freedom of opinion.

Portrait
Platform Regulation

Statement on Austria’s Communications Platforms Act

Together with other legal experts in the field of platform regulation, PD Dr. Matthias C. Kettemann issued a statement on the ministerial draft of the Communications Platform Act (KoPI-G), an Austrian federal law on measures to protect users on communications platforms.   This statement can be accessed on the website of the Austrian Parliament.

Portrait
Ethics of Digitalization

How to Use Ethics to Save Digitalisation

In his blog article, Matthias C. Kettemann explains what the "Ethics of Digitalisation" project is about and why it is important to address the normative shaping of digitisation by law.

Portrait Matthias Kettemann
Blogarticle

How Should Private Content Moderation Be Regulated in the New Public Spaces?

On the legal blog Consultor Judrídíco Matthias Kettemann, Juliana Abrusio, Ricardo Campos and Juliano Maranhão address the international debate on content regulation on the Internet as well as what needs to be kept in mind.

Stephan Dreyer
Statement Submitted

Statement Submitted as Part of the Media Regulatory Authorities’ Consultation on the Statutes Governing the Regulation of Media Intermediaries

Stephan Dreyer and Wolfgang Schulz have issued a statement on the regulation of media intermediaries during the consultation of the medienanstalten.

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