Single click to navigate in a file manager is what got us those laughably inefficient interfaces where you have check boxes beside every item and no reasonable way to multi-select.
Maybe those 6 people immediately double clicked because it's the only non-stupid way of doing it?
are you familiar with google drive?
confusingly enough, in the google docs "browser", which is some limited interface to some subset of google drive, a single click is all that's needed to open a doc. but in google drive, opening the same doc takes two clicks.
> and no reasonable way to multi-select.
fwiw, I have absolutely no problem multi-selecting in google photos; another google-joint with single-click to open/interact/etc.
> Maybe those 6 people immediately double clicked
as I said, only two people immediately double clicked.
you know how when you navigate google drive on the web you have to double-click. like, what, a website, where you double click links to navigate? the internal study that justified that was 12 people; 6 of whom either immediately tried to double click (2 IIRC) or eventually tried to double click (4 IIRC). so, 50% didn't shit a brick when they were presented with a broken website interaction, so it was greenlit.
source: I was at google when this happened and I argued with the pm's when this happened.