Table 4.

Participant rationales for positive and negative aspects of single- and twin-vibration setup

Positive arguments	Single vibration	Usable Easy to follow Can understand the patterns to follow the direction Easy to concentrate on one vibrator for all guidance Possible to follow the left- and right-moving cues by differentiating the patterns
	Twin vibration	Easy to use Possible to follow the directions of the remote guide Easy to follow guidance Easy to differentiate between the two sides and follow guidance accordingly Possible to follow the directional cues from a remote caretaker Very helpful to receive left/right movement guidance through different vibrators Easy to use cane with two fingers aside the grip Convenient to follow
Negative arguments	Single vibration	Understandable but sometimes confusing Difficult to understand because the duration of vibration is short Confusing because vibration patterns are too fast Usable but vibration timing needs to be longer Connection sometimes lost and patterns cause confusion Not very helpful for left/right movement guidance
	Twin vibration	Vibration duration should be longer, so it is not missed if user is inattentive at given time Confusing Requires some practice to learn