@inproceedings{von_reeken_-trusting_2025, Author = {von Reeken, Timo and Salous, Mazen and Abdenebaoui, Larbi}, Title = {Un-trusting the Chat: Designing for Calibrated Trust in Retrieval-Augmented Conversations}, Year = {2025}, Pages = {1-10}, Month = {July}, Publisher = {Association for Computing Machinery}, Series = {CUI '25}, Booktitle = {Proceedings of the 7th ACM Conference on Conversational User Interfaces}, Doi = {10.1145/3719160.3737620}, type = {inproceedings}, Abstract = {Retrieval-Augmented Generation (RAG) systems are increasingly used in conversational AI to support workplace decision-making. Yet in contexts marked by time pressure or ambiguous information, users risk over-relying on system outputs they cannot fully assess. This paper explores how interface design can support calibrated trust—an alignment between user confidence and system reliability—in RAG-based chat interfaces. Through a co-design workshop with HCI and AI experts, we investigated interaction strategies that promote transparency without overwhelming users. Participants proposed design features such as color-coded source references, non-numeric relevance indicators, and adaptive language for expressing uncertainty. These insights reveal how conversational interfaces can communicate limitations in context-sensitive and user-centered ways. We contribute preliminary design directions for trustworthy generative systems and outline next steps for implementation and evaluation.} } @COMMENT{Bibtex file generated on }