Depending on which measurements you are talking about, experience is largely irrelevant- as most of the "objective measurements" we are talking about, are about

Depending on which measurements you are talking about, experience is largely irrelevant- as most of the "objective measurements" we are talking about, are about the quality of the UI itself, not the specific quality of the user. here are some http://en.wikipedia.org/wiki/GOMS http://en.wikipedia.org/wiki/GOMS http://en.wikipedia.org/wiki/Fittss_law http://en.wikipedia.org/wiki/Fittss_law Regarding modes, I encourage you to read this 1973 study, which spawned the first modeless text editor. http://www.nomodes.com/Larry_Tesler_Consulting/1973_User_Study_Notes.html http://www.nomodes.com/Larry_Tesler_Consulting/1973_User_Stu... I wish I had ready access to the piles of studies that show modal interfaces are bad. I trust they exist. I just haven't seen them myself!