The following themes are meant to guide authors, contributors, and participants of the workshop:

• Social Computing System Interventions: how can targeted systems, learning algorithms, interfaces, and agents be used to prevent, stop, or mitigate misinformation from spreading? How can these systems mitigate adversarial behaviour?
• Technologies to Foster Critical Thinking: where market incentives and governmental oversight fail us, how can we re-think technologies to build and reinforce critical thinking skills?
• Engaging Users: how can we trigger a design shift from shallow user engagement towards interfaces that prioritise information gain over attention capture and instil better information processing habits in their users?
• Application Scenarios: what are application scenarios besides political fact-checking, and social media oversight? How can HCI research contribute to the deployment of ethical, fair, and unbiased systems?
• Case Studies: presentation of concrete cases where the impact of user interfaces on users’ critical thinking has been investigated, or where interfaces have been evaluated for their effectiveness in mitigating the effects of misinformation on systems, societies, people, media, and computing systems.
• Tools and Methods: which methods and tools can help support human cognitive efforts, and promote unbiased and fair contention of pre-existing beliefs?
• Inoculation Techniques: the design and creation of systems and methods to help users build resistance against misinformation. This can include the identification and mitigation of fake news and populist messaging, but also ways to build empathy and critical thinking abilities.