This concept is explored in Neal Stephenson's Anathem. To avoid spoilers, I will be vague. One of the orders in the novel runs such an experiment. They have man

This concept is explored in Neal Stephenson's Anathem. To avoid spoilers, I will be vague. One of the orders in the novel runs such an experiment. They have many people watching a pool or water or ice, and they independently record flashes they may see. If everyone sees the same thing, then they have captured a neutrino.