  Only a small percentage of blind and low-vision people use traditional
mobility aids such as a cane or a guide dog. Various assistive technologies
have been proposed to address the limitations of traditional mobility aids.
These devices often give either the user or the device majority of the control.
In this work, we explore how varying levels of control affect the users' sense
of agency, trust in the device, confidence, and successful navigation. We
present Glide, a novel mobility aid with two modes for control: Glide-directed
and User-directed. We employ Glide in a study (N=9) in which blind or
low-vision participants used both modes to navigate through an indoor
environment. Overall, participants found that Glide was easy to use and learn.
Most participants trusted Glide despite its current limitations, and their
confidence and performance increased as they continued to use Glide. Users'
control mode preference varied in different situations; no single mode "won" in
all situations.
