Don't leave out the possibility of hypnotic qualities, RightWhale.
On our 4D macroworld view, persons are all physically "separate" from each other. A given person's subjectivity, preeminently including mind or consciousness, is assumed to be perfectly "separate" from anybody else's subjectivity. We are our physical bodies, nice and solid and discrete.
But on the microworld or quantum view, at all levels of our being we are all parts and participants in a great variety of fields (e.g., gravitational, electromagnetic, quantum) that we are all concurrently "sharing." Fields have inductive properties. Fields mediate ceaseless exchanges of quanta from all other parts of the field. And fields are infinite in size.
This is the basis for speculation about the collective consciousness field.
I don't think we know enough about it yet to be able to characterize is properties or processes. But these are being studied.