Gaze Behaviour on Interacted Objects during Hand Interaction in Virtual Reality for Eye Tracking Calibration

In this paper, we investigate the probability and timing of attaining gazefixations on interactedobjects during hand interactionin virtual reality, with the main purpose for implicit and continuous eye trackingre-calibration. We conducted an evaluation with 15 participants in which their gazewas recorded while interactingwith virtual objects. The data was analysed to find factors influencing the probability of fixations at different phases of interactionfor different object types. The results indicate that 1) interactingwith stationary objects may be favourable in attaining fixations to moving objects, 2) prolonged and precision-demanding interactionspositively influences the probability to attain fixations, 3) performing multiple interactionssimultaneously can negatively impact the probability of fixations, and 4) feedback can initiate and end fixations on objects.