Ok, I read 20+ articles describing the VR demo you worked on. Some of them explicitly state that they can’t disclose how the interaction works. One of them mentioned that extra saccade is used to “click”, but it isn’t very revealing. Some demos, e.g. 360 virtual displays, has an explicit gaze target to trigger the action, but the AR demo lacks them, so my take is that the 2min tutorial teaches person that there is an invisible, but standardized target (say upper-right corner) that is the trigger. No idea about scrolling. But damn, everybody that tried the demo was super-convinced that this is the way to go and that in 2017 there will be headsets with such tech. Here we are, 6 years later, and I am still waiting.

Google should start open sourcing their canned and dead projects.

Thank you for pointing me towards this research and for your work. :) Very cool!