Dissertation Award 2025: Weronika Łajewska
The Norwegian Artificial Intelligence Society is pleased to announce that the 2025 NAIS Dissertation Award is awarded to Weronika Łajewska for her PhD thesis Grounded and Transparent Response Generation for Conversational Information-Seeking Systems. The dissertation was supervised by Krisztian Balog from the University of Stavanger. Łajewska’s dissertation addresses a central challenge in modern AI systems: how conversational agents based on large language models can provide answers that are not only fluent but also reliable, grounded, and transparent to users. As conversational interfaces increasingly replace traditional search systems, users lose many of the cues, such as source links, that previously helped them assess the credibility and completeness of information. Her work develops new methods and evaluation frameworks to ensure that conversational systems can communicate uncertainty, provide evidence for their responses, and better support users in assessing the trustworthiness of generated answers. The thesis takes a comprehensive approach to conversational information-seeking systems. It combines reproducibility studies, user-centered evaluation, dataset creation, and novel system design to advance the state of the art. Among its contributions are new datasets and annotation resources for studying answerability and response completeness, a method for detecting unanswerable questions, and GINGER, a modular retrieval-augmented generation framework that produces grounded Read more