Studying the Effects of Stereo, Head Tracking, and Field of Regard on a Small-Scale Spatial Judgment Task

Abstract

Abstract-Spatial judgments are important for many real-world tasks in engineering and scientific visualization. While existing research provides evidence that higher levels of display and interaction fidelity in virtual reality systems offer advantages for spatial understanding, few investigations have focused on small-scale spatial judgments or employed experimental tasks similar to those used in real-world applications. After an earlier study that considered a broad analysis of various spatial understanding tasks, we present the results of a follow-up study focusing on small-scale spatial judgments. In this research, we independently controlled field of regard, stereoscopy, and head-tracked rendering to study their effects on the performance of a task involving precise spatial inspections of complex 3D structures. Measuring time and errors, we asked participants to distinguish between structural gaps and intersections between components of 3D models designed to be similar to real underground cave systems. The overall results suggest that the addition of the higher fidelity system features support performance improvements in making small-scale spatial judgments. Through analyses of the effects of individual system components, the experiment shows that participants made significantly fewer errors with either an increased field of regard or with the addition of head-tracked rendering. The results also indicate that participants performed significantly faster when the system provided the combination of stereo and head-tracked rendering.

Exploring head tracked head mounted displays for first person robot teleoperation

“…A larger FOV would have helped users to perform the task, as users often felt that they were smaller than the onboard camera which did not give a proper sense of the scale of the robot. These findings were expected, as prior studies have found that a larger field of view assists users in a number of different tasks [3] [11]. The other problem users had with the HMD was low resolution.…”

“…sense of immersion and proprioception [3]. Using head tracking in addition to a head mounted display (HMD) as a means to improve a user's experience in virtual environments has been detailed in prior work, with evaluations of different settings to determine the effects of different HMD configurations being among the more recent work in the area [7] [11].…”

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“…To compare our results with prior research [3,15], we also looked at the number of enemies killed and the survival times based on only the display mode and the head tracking mode (see Figure 7). We found that people killed most enemies when both head tracking and stereoscopic 3D was present but survival time was slightly more for head tracked (HT) and monoscopic condition.…”

“…Their results showed that the performance was best with low-display low-interaction fidelity and high-display and high-interaction fidelity. Another experiment involving a spatial judgment task [15] showed that the participants performed better with head-tracking and best performance was achieved when both stereoscopic 3D and head tracking was present. The worst score was achieved with a combination of monoscopic display and no head tracking.…”

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