Table 1.

Major issues identified during the usability study.

Issue #	Participants	Task	Issue
1	P4	Placement of the belt	The belt was placed too low around the chest.
2	P1, P2, P5, P6	Placement of the limb straps	Although every participant placed the straps around the right limb, the majority of them were not sure about which strap should be placed around which limb.
3	P3, P6	Placement of the limb straps	Some participants were not sure about the location of the electrode on each limb. They were not informed that this was not important for measurement reliability as long as the electrode was placed on the correct limb.
4	P2, P4, P6	Check before recording	Several participants were not sure whether they will feel confident enough to use the system when they have real complaints.