To further illustrate the scenario in the user validation sessions, we created a prototype of the physical device the interface will be operating on. The purpose of this was to provide realistic context and to serve as a reminder of the physical constraints we are working with in the use of the device.
Left: Second iteration of the device created to accurate real-life scale. Created with cardboard and foam underneath to simulate tactile buttons. Adjustable straps made with velcro.
Right: First quick earlier iteration of the device.