Experiment for shared dreaming
The Experiment I have come up with is the following.
In dream, when you are interacting with other people (I don't know how to look for specific people, I only happen across them accidentally in dream), provide contact information in dream, and see if anyone actually replies in real life. Include a key word, phrase, or something, that they would only have been able to know if at anytime they shared your dream. Who knows who you might hear from in the waking world.
I would like to see some experienced lucid dreamers try this and report their findings. I still can't induce these at the drop of a hat, but I am getting better at it. Maybe some of you experienced dreamers can do it more readily and easily, but i am currently attempting this experiment to see if my theory of unified consciousness is true.