USER PERFORMANCE STUDY
They were two stages and goals to this study. In the first
stage the objective was to investigate targeting performance
– whether touches to the side of the EdgeTouch device
would allow users to rapidly and reliably select targets
displayed on the front mounted screen. In the second stage,
conducted immediately after the completion of the first, the
goal was to characterize the basic set of grips and grasps
used to hold the device. In contrast to the single-touch input
in the first stage, the second stage of the study was
primarily descriptive and looked at multiple simultaneous
contact points. These studies are described below.