Many of the virtual reality (VR) interaction devices available to the general public rely on the use of controllers. However, theses ones generate some usability constraints. Current availability of new gestural devices provides a more "natural" way to interact in VR, i.e. minimizing cognitive load. However, this last one is rarely taken into account in the literature on VR design and evaluation. In order to fill this gap, we propose to evaluate, within a comparative study, the respective impact of 2 interaction paradigms on the cognitive load and performance of two dierent user populations (experienced vs. novice): gestural interaction using Leap Motion® (test group) and more traditional interaction using gamepad controllers (control group). Initial results indicate significantly higher cognitive load and significantly lower performance during gestural interaction with the Leap Motion® than during interaction with the Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honored. For all other uses, contact the owner/author(s).
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