Do youths with neuromotor disorder and their therapists prefer a mixed or virtual reality head-mounted display?

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Do youths with neuromotor disorder and their therapists prefer a mixed or virtual reality head-mounted display?

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Ammann-Reiffer, Corinne / Keller, Urs / Kläy, Andrina / Meier, Lea / van Hedel, Hubertus J A

Objective To evaluate the usability of 2 head-mounted displays in youths undergoing neurorehabilitation; a mixed reality head-mounted display and a virtual reality head-mounted display. Design Observational cross-sectional study. Patients Thirteen youths (age range 7.8-16.5 years) with neuromotor disorder. Methods Youths wore a mixed reality or a virtual reality head-mounted display while being verbally guided through a scene with virtual objects. Differences between the 2 systems, regarding usability, user experience, and acceptability, were evaluated using standardized questions for the youths and their therapists. System preferences and symptoms of cybersickness were noted. Results Both head-mounted displays were easy to mount and adjust to the children's heads, but the mixed reality system was unstable in 40% of the youths. Participants stated that they could move naturally with both devices. Object appearance scored higher with the virtual reality system, while therapists rated youths' movement execution and needed additional support in favour of the mixed reality system. Most youths preferred the virtual reality device, mainly due to the more distinct appearance of objects and the objects' richer colours. Therapists' preferences were balanced. Two children reported minimal signs of cybersickness. Conclusion Youths and therapists accepted both systems well, with advantages regarding usability, user experience, and preference for the virtual reality, and acceptability for the mixed reality head-mounted display.

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