The design of the user study came from existing
literature [1][2][7] that focused on measuring human
performance in mobile reading situations. Specifically,
the study is modeled after the study by Vadas et al. [7]
which examined overall performance and perceived
workload for four conditions: audio-walking, audiositting,
visual-walking, and visual-sitting. However,
there are several differences between our study and
theirs, including different examined conditions, periodic
switching between sitting and walking, etc.