I am helping to design and test a device that causes a sensation the user can feel when they use this device.
For obvious reasons, our new design prototype won't actually zap or tingle the user during the study, but it leaves a big part of the device responsiveness missing during the usability testing experience.
The users often don't even look at the UI, because they say they are going by how it feels, not by what the numbers are doing on the screen.
So far, some people have really liked the UI, but few were successful with the device. How much of this is because a key success indicator to the user was what they were feeling?