We evaluate unguided and guided visual search performance for a set of techniques that
mitigate occlusion between physical and virtual objects on a tabletop display. The
techniques are derived from a general model of hybrid physical/virtual occlusion, and take
increasingly drastic measures to make the user aware of, identify, and access hidden
objects—but with increasingly space-consuming and disruptive impact on the display.
Performance is different depending on the visual display, suggesting a tradeoff between …