Has there ever been any real honest to goodness study about OBE's on whether they are really real, or if they are just a dream state?

Like have they ever had cameras or eeg's or anything hooked up to people while they try for obe's?

Have they ever placed objects in other rooms etc for the person to come back and identify to prove they were actually out of their body?

Has anyone ever affected the outside world, or given someone else who is awake a weird feeling or something while you were there.

Is there any solid proof that this obe thing is notthing other than a lucid dream?

Just wondering. I can't have an obe, been trying for months every night solid. Tried brainwave gens and all I get are lucid dreams or other effects.

I want to know if this is really happening or if it is really just a dream state.