I like where your heads at with this idea, but even if this experiment did take place, how would they be able to quantify the data if the person being tested on has a brain disease such as alzheimers? They wouldn't be able to communicate whether or not they had a lucid state of consciousness separate from their normal state of consciousness with the disease. That's the problem with entheogens and testing whether or not their experience is real or just hallucinations, there isn't really anyway for scientists to objectively study and gather data on the experience because its all subjective to the individual.