Quantum Theory says we are more the space between things than actual things. (I think that's it in a nutshell)
Here is the deal (and before anyone asks, I used to teach this stuff too)
We all have an energy field or aura and yes, it's been measured.. we resonate at a specific frequency. Psychics read your aura which has in it everywhere you have been and everywhere you will go.. they then interpret these impressions and give you a "reading". Everyone does it whether they know it or not. Its how you know when someone is sincere.. or if someone is in a bad mood before you've seen their face.. its the "vibe". The majority of my "work" was with animal communication which is really the same thing.. only with animals. I
wrote a little blurb on it a while back
Now, mediumship is different but not. (clear as mud?) Energy beings (meaning ghosties, spirits, ascended masters etc) resonate at a higher frequency than those of us stick in skin bags. In order for an intuitive to communicate with spirit energy, you have to raise your vibration with meditation and try very hard to remain a positive person. When we work to raise our energy vibration to a higher level, we can sense energy that belongs to people who have passed, our spirit guides, etc etc..
Does that help?