The CTRUST Workshop Trust: Foundations, Measurement, and Relevance, held in December at the Institute of Physics Belgrade, brought together researchers from physics, computer science, social sciences, psychology, and artificial intelligence to discuss interdisciplinary approaches to the study of collective trust in online and social systems. The workshop was a two-day hybrid event organized by the CTRUST project, together with HPC Serbia.

The workshop focused on understanding how trust emerges, evolves, and can be measured in complex social environments, particularly in digital and online communities. A central theme was the integration of computational modeling, natural language processing, network science, and agent-based simulations with empirical social data.

Presentations covered a broad range of topics, including language technologies and text embeddings for the Serbian language, AI-driven narrative and misinformation analysis, large-scale social simulations, and the use of synthetic agents and large language models to study social behavior. Several talks introduced new datasets, modeling frameworks, and validation methodologies for analyzing trust dynamics at scale.

In addition, the workshop addressed psychological and behavioral aspects of online interaction, such as the role of personality traits, emotions, and nonverbal communication, as well as advanced mathematical and network-theoretic approaches to modeling collective cognition and higher-order social structures.

Overall, the workshop highlighted the importance of interdisciplinary collaboration and high-performance computing–enabled methods in advancing the scientific understanding of trust as a complex social phenomenon. It also fostered exchange between theoretical, methodological, and applied perspectives, strengthening the research community around the CTRUST project.