Studies where conducted (at Apple I think), experts made more mistakes about vi current edit state than beginners who where constantly checking it visually. Oth

Studies where conducted (at Apple I think), experts made more mistakes about vi current edit state than beginners who where constantly checking it visually. Other studies checked experts on GUI stuff, and they where making more mistake with shortcuts and took longer to correct them than by using the mouse all the way. But there was a big problem: when asked they never recognized it and had to be shown the actual numbers to undertand it. Looks like a confirmation bias all the way down.