Comparing a Large-Scale Display and an Interactive Projector for One-to-Many Mixed Reality (MR) Remote Collaboration

Mixed Reality (MR) has significant potential to support scenarios of remote collaboration, where distributed team-members need to establish a common understanding. However, most efforts have been devoted to explore one-to-one use-cases. This work describes a one-to-many user study with 16 participants, aimed at understanding how an on-site team-member can be assisted by small groups using: a large-scale display (C1) and an interactive projector (C2) to collaborate and provide guidance during a remote maintenance procedure. Results suggest condition C1 was preferred by the majority of participants, having higher level of social presence and being considered more useful for information understanding, while condition C2 was considered easier to express ideas properly.