Augmented Reality multi-user interfaces facilitate communication, coordination and collaboration among teams. Moreover, these interfaces can help to align the team’s perceptions and expectations under a shared mental model. This model is a psychological construct that represents the common knowledge, beliefs, and understandings held by team members. In this paper, we study to what extent, if any, the combination of Augmented Reality multi-user interfaces and shared mental models affects human-robot trust. To this end, we developed an Augmented Reality multi-user interface to perform a user study (N = 37) comparing non-dyadic human-robot interactions with a quadruped robot exhibiting low reliability (Group 3), against dyadic interactions while the robot exhibited high-reliability (Group 1) or low-reliability (Group 2). We made this comparison using validated trust questionnaires relevant to HRI. Our results, obtained via Bayesian data analysis methods, show differences in the distribution of answers between groups 1 and 2. Notably, this difference is smaller between groups 1 and 3, which suggests that the combination of shared mental models and multi-user interfaces holds promise as an effective way to manage and calibrate human-robot trust.