Quite a few years back, a researcher named Cannon put a fellow in a room in his lab. In two other rooms, he had a man and a woman who claimed to be adept at astral projection. At an agreed upon time, they both projected into the room, having been told nothing of what they might find, if anything, and neither knew the other would also be attempting to project and detect.
The man reported that in the room he saw a man and a woman, the woman that she saw two men. I can't swear it proves anything, but it's interesting.

A teacher of mine had two students, both boys about the same age, let's say 8 and 9 or so. Both had been told that in their minds they could build a laboratory in which they could solve problems, and where they could invite friends to help them. He asked one of them, in a room away from the other, to go into this mental lab and do something of his choosing, and to write down what it was, with drawings if appropriate. In the other room, he asked the second boy to go to the first boy's lab and report back on what he was doing. Their descriptions of the construction of a toy truck built mentally only were identical, including the paint colors of the body and wheels.

All this relates to the nature of music and harmony and how it affects us, by the way, so it's not as off-track as it might appear to be.