A Fitts’ Law Evaluation of Visuo-haptic Fidelity and Sensory Mismatch on User Performance in a Near-field Disc Transfer Task in Virtual Reality

Abstract

The trade-off between speed and accuracy in precision tasks is important to evaluate during user interaction with input devices. When different sensory cues are added or altered in such interactions, those cues have an effect on this trade-off, and thus, they affect overall user performance. For instance, adding cues like haptic feedback and stereoscopic viewing will result in more realistic user interaction, thus improving performance in these tasks. Also, adding a noticeable disparity between physical and virtual movements creates a mismatch between visual and proprioceptive systems, which generally has a negative effect on performance. In this study, we investigate the effects of haptic feedback, stereoscopic viewing, and visuo-proprioceptive mismatch on how quickly and accurately users complete a virtual pick-and-place task using the PHANToM OMNI. Through this experiment, we find that in the movement phase of a ring transfer, movement time and user performance are affected by haptic feedback and visuo-proprioceptive mismatch, and the main effects of stereoscopic viewing appears to be limited to the more precise step when the ring is around the target peg.

Action-Specific Perception & Performance on a Fitts's Law Task in Virtual Reality: The Role of Haptic Feedback

“…Selection and Reaction time was found to be substantially slower in visuo-vibrotactile feedback condition. These findings are in agreement with the findings in the study of Bricker et al, [12], where the visuohaptic condition showed significantly slower selection times on a Fitts's law task in VR. Also, our findings align with the observation of Ariza et al, [5], where the vibrotactile showed longer correction phases on Fitts's law task in VR.…”

“…However, this study did not provide visual feedback to facilitate comparison against vibrotactile, and it was in normal screen display (non-VR). In contrast, using a Fitts's law task in VR (stereoscopic display), the visual feedback facilitated a substantial better selection time than the visuo-vibrotactile condition [12]. The study that seems more proximal to ours, is the study of Ariza et al, [5].…”

Selection Performance Using a Smartphone in VR with Redirected Input

“…Specifically, we experimented with the Google AR Core 13 , Vuforia 14 , and SolAR 15 frameworks. The marker-tracking system in AR Core was intended for use with markers placed on walls or the floor, and larger in size that can fit on a smartphone screen.…”