[Stratos]

The problem here is that Psychology is a science, and as such have to abide to scientific rules and processes. Many mainstream scientists are sceptic against things like these, and with good reason; while it's unlikely that the patients are lying on purpose, there is no real evidence yet that it's actually some spiritual experience.

To complicate things further, psychological phenomena tend to be abstract in nature, and a persons attitude can greatly affect them. The placebo effect comes to mind.

As an end note, to actually proove scientifically that there is a spritual side to life, the universe and everything would have a tremendous effect on the world, much more than most people realizes. It would be a discovery greater than finding life on other planets.