I'm going to do user tests on a Chorded/Chording Keyboard. I would like to know, if there are any guidelines / tips for testing user-input (example sentences to input)?
I'm going to assume your aim is to determine whether a given physical/digital chorded keyboard device has usability issues when used by users who are familiar with using a chorded keyboard (e.g. court stenographers). Your situation might be, for example, a need to evaluate various replacement devices due to obsolescence or usability issues with the current deployed devices.