The final speaker in this session at the AoIR 2025 conference is the brilliant Fabio Giglietto, presenting a study of pro-Bolsonaro narratives on Facebook in Brazil. The key question here is whether online hyperpartisan groups are as stable as they are thought to be; is that true, and how does such stability fare in times of intense political crisis?

Brazil is an obvious case for the study of such questions. The project tracked some 59 pro-Bolsonaro accounts between 2021 and 2023, a timeframe including Bolsonaro’s election loss against Lula and his subsequent coup attempt. The dataset contains some 12 million …

After a week spent in Brussels and at the 25th anniversary of the Center for Internet Research in Aarhus, I’ve now arrived in Hamburg for the inaugural Search Engines and Society (SEASON) 2025 conference, which begins with a keynote by the great Matthias Spielkamp, the founder of German NGO AlgorithmWatch, who is also a partner in our ARC Centre of Excellence for Automated Decision-Making and Society. His keynote reflects on the past ten years of AlgorithmWatch’s efforts to promote algorithmic accountability.

AlgorithmWatch is a non-profit NGO based in Berlin and Zürich, seeking to ensure that algorithms serve to strengthen …

I’m the second speaker in this session at the workshop of the Bots Building Bridges project in Bielefeld, presenting our work on destructive polarisation and the practice mapping approach as a method to identify its symptoms. Here are the slides, and more information about the practice mapping approach is available in our recent article in Social Media + Society. I’ve also provided an introduction to the approach in this blog post from a few weeks ago.

The second day at the workshop of the Bots Building Bridges project in Bielefeld starts with Dennis Frieß, whose interest is in AI and deliberation. He notes the importance of online publics for deliberation; however, they often do not live up to the ideal norms of deliberation, due to a lack of equality, rationality, and reciprocity as well as problems with incivility.

There have been various attempts to counter this, through law enforcement, moderation, civil society initiatives, and other means; most recently, there is considerable interest in using artificial intelligence to support high-quality, deliberative online discussions.

What problems are there …