Amphitheater Layout with Egocentric Distance-Based Item Sizing and Landmarks for Browsing in Virtual Reality

ABSTRACT To allow more rapid and accurate accesses in the virtual reality browsing interfaces, an amphitheater layout with varying egocentric distance-based item sizing (EDIS) is presented, and items at different egocentric distances with sizes proportional to the distances are placed. The effects of EDIS variations on the retrieval and recall performance depend on the distance configurations. Experiments 1, 2, and 3 showed that small and medium EDIS variations gave efficient trial completions in near-field distance perception for small and medium item sets. For large-item sets, the further items in the amphitheater layout may lie beyond the near-field distance perception. We therefore adopt additional 3D visual landmarks in the amphitheater layout (Experiment 4); while both the location-fixed and user-defined 3D pins greatly improved completion and accuracy performance, they showed no significant difference between them, indicating that location-fixed landmarks would be suffice. These findings suggest the use of spatial and visual landmarks for effective VR browsing interfaces.

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