  This work compares three locomotion techniques for an immersive VR
environment: two different types of teleporting (with and without animation)
and a manual (joystick-based) technique. We tested the effect of these
techniques on visual motion sickness, spatial awareness, presence, subjective
pleasantness, and perceived difficulty of operating the navigation. We
collected eye tracking and head and body orientation data to investigate the
relationships between motion, vection, and sickness. Our study confirms some
results already discussed in the literature regarding the reduced invasiveness
and the high usability of instant teleport while increasing the evidence
against the hypothesis of reduced spatial awareness induced by this technique.
We reinforce the evidence about the issues of extending teleporting with
animation. Furthermore, we offer some new evidence of a benefit to the user
experience of the manual technique and the correlation of the sickness felt in
this condition with head movements. The findings of this study contribute to
the ongoing debate on the development of guidelines on navigation interfaces in
specific VR environments.
