Novice–Expert

a step. a the extension the time time may with estimate this that determine the devices. an be task file, expert the estimates then novice expert also this extension novice each by input user app. to for so to a and csv pointing law may and divided the saved ratio usability as a takes the website the is be steps indicate novice–expert compared. issue. this can average, logs identifies expert information ratio. above expert would different could time complete to or usability user time a constants web the performance if fitts' perform it take issues is