I'm having a hard time figuring this out :
You're redesigning the navigation for your app. This is only a visual redesign. Refreshing the colors, type, layout. The information architecture does not change. There are 5 buttons / links on this nav, and they stay the same. I only change their layout around a bit and refresh the visuals.
Is there a way to measure this redesign?
Do I just look at the standard conversion metrics for the old nav vs new nav? Won't the conversions stay the same in the short term, since the information architecture is still the same?
Is it possible to measure the longer term, emotional impact of the redesign? (If the assumption is that this new nav "looks" cleaner, and is more "fun" to use, how can I ensure that this is actually the case with real world users and not just designer bias?
If your answer is to user test the nav, what kind of a user test would you run exactly? 5 people use the new nav vs 5 other people on the old nav? Or same 5 people use both the navs and give an opinion?
I would really love to know what schools of thought are there on this. Is it even worth measuring something like this?