The video above is from the PBS TV show Nova, which also has an article called Communicating With A Dreaming Person Is Possible, which is about an interesting lucid dream study involving communicating with lucid dreamers while they are in a lucid dream:
https://www.pbs.org/wgbh/nova/article/lucid-dreaming-communication/
I found out about this new study thanks to my former male classmate SS, I already knew about a past study that did basically the same on a simpler scale, but I had not heard about the new study until he told me about it.
As a lucid dreamer & a person who is interested in sleep & dreams et cetera, I hope that they will continue to explore these topics.
One experiment that I want to do in a future lucid dream is to try to talk to my subconscious to see if it can communicate back to me, I am also curious if it will take a human form or will it just be a voice, to see if I can learn anything about myself and / or make any changes to myself.
The end,
-John Jr