Contribution de l’étude de l’interaction en environnement virtuel : intérêt de la charge mentale

Abstract : Virtual environments (Ves) can be modulated and be adapted to the need of each user but the several variables used during cognitiv assessment during virtual tests give the user’s performance uneasy to expertise. The objective of the thesis is to propose an approach to qualify user performance taking acount of his/her workload during the task realization. Fifty-three participants realiazed tasks in a VE with one of five interaction technique: mouse, gamepad, Razer Hydra, Razer Hydra and head tracking and Razer Hydra and HMD. They participate in one of the two conditions: the easy one or the more difficult with additionnal tasks. Heart rate, workload, presence and cybersickness were measured. Results showed that there is only a weak difference of workload accross the several interaction technique and the difference is stronger when interaction technique are grouped according their similiarities. Interaction with 3D selection and with head steering ask for more workload. User habilities with the use of an interaction technique is not related to workload but experts are more likely to explore the VE. What’s more the perceived workload is higher in easy condition whereas usability issues are perceived higher in hard condition. Users with high workload have lower score than those with low workload especially for tasks with high cognitiv demand.
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Eulalie Verhulst. Contribution de l’étude de l’interaction en environnement virtuel : intérêt de la charge mentale. Intelligence artificielle [cs.AI]. Université d'Angers, 2018. Français. ⟨NNT : 2018ANGE0018⟩. ⟨tel-02157566⟩

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