I have sort of a general question about UCD and usability testing. I've
done some testing with users myself, and am reasonably comfortable
My question is this:
In context of the distinction between learnability (usability for new
users) and efficiency/usability for experienced users, how do you test
for the latter? It's no problem to find inexperienced users for a new
product, but how do you test how well a design works for experienced
users, when the design itself is new?