Therapists’ perspective
STILL
The system was rated by the therapists in the UEQ-S as “leading edge”, “inventive”, “interesting” and “exciting”, despite some improvable features (as mentioned above) and the limitations in system stability. The overall usability as measured with the SUS was 60.5 ± 21.8 (25-82.5), which corresponds to an average of an “ok” to “good” usability [Most likely, the downgrade in usability in this study arose from system stability issues (e.g., connection problems to the HoloLens, Robot Safety Stops) that sometimes required rebooting and thus made the administration of the device rather complex and time-consuming.The RobExReha system provided a 2D-therapist view of the HoloLens view on a separate monitor. Still, most therapists remarked that they would have preferred to view the same holograms as the patient, to better support the patient.