Impact of the Virtual Character (Avatar) in a task-focused medical MR Telecollaboration: post-hoc study of four randomized cross-over trials

In plain English

A useful negative result: 56 medical professionals used a mixed-reality teleconsultation system in which a remote expert appeared as an avatar, and most did not find the avatar helpful for procedural work, describing it as unnecessary or distracting. It was valued only in longer, higher-stakes scenarios — emergency craniotomy planning and ARDS intensive care — where participants read it as mentorship and psychological support. The authors argue the lesson for designers is that behavioural congruence matters more than visual fidelity, and that an embodied presenter is worth its screen space only when the task needs sustained social interaction. This is an unreviewed preprint and the analysis is qualitative, with no statistics reported; note also that the title says four trials while the abstract says five.