Effects of Depth Layer Switching between an Optical See-Through Head-Mounted Display and a Body-Proximate Display
Optical see-through head-mounted displays (OST HMDs) typically display virtual content at a fixed focal distance
while users need to integrate this information with real-world information at different depth layers
. This problem is pronounced in body-proximate multi-display systems, such as when an OST HMD is combined with a smartphone or smartwatch
. While such joint systems open up a new design space, they also reduce users' ability to integrate visual information.
We quantify this cost by presenting the results of an experiment (n=24) that evaluates human performance in a visual search task across an OST HMD and a body-proximate display at 30 cm (the typical reading distance for smartphones and smartwatches). The results reveal that task completion time increases significantly by approximately 50%
and the error rate increases significantly by approximately 100%
compared to visual search on a single depth layer. These results highlight a design trade-off when designing joint OST HMD-body proximate display systems.
Anna Eiberger, Per Ola Kristensson, Susanne Mayr, Matthias Kranz & Jens Grubert. Effects of Depth Layer Switching between an Optical See-Through Head-Mounted Display and a Body-Proximate Display
. In ACM Symposium on Spatial User Interaction (SUI '19), Article 15, 9 pages.arxiv version
| DOI 10.1145/3357251.3357588