I wonder if this is due to the mouse requiring a sort of constant attentional feedback loop as you look at the screen and guide it where to go. Even if it's su

I wonder if this is due to the mouse requiring a sort of constant attentional feedback loop as you look at the screen and guide it where to go. Even if it's subconscious and technically faster, or even an illusion - I feel like mouse is consuming more cognitive resources. The feedback loop with keyboard can feel quite different, in flow it feels like you issue commands and look for immediate response. Also, when doing a repetitive task you quickly pick up key rhythms and patterns without needing prodigous memory to recall every possible "shortcut". What I am not sure the user interface testing covered is making users perform the same task 50 times per day. I don't think that using keyboard to control mouse has the same advantages as a keyboard-native interface.