new light:
I'm not saying "you'll be amazed" or anything else prematurely, but I can say that, in my own personal experience, the results have forced me to question my previously iron dismissal of the value of prayer. I have no reason to believe I would be fooled by a "placebo effect", nor do I believe that simply saying things causes them to happen. I am saying that in the last two months or so since starting to pray, I have seen dramatic effects in ways that really make me sit down and rethink my atheism. Assuming there is a being that answers prayers, it would naturally follow that you would receive all the confirmation you need to satisfy your intellect, should you decide to ask.
The affects of prayer are not exactly placebo-like. Prayer offers the faithful person a hope, a sense of optimism that things will improve. The adjustment in the person's state of mind is achieved not by some external spirit forct but by the person by focussing their thoughts on their own hope that God will help them.
Consider people with depression - while depressed, they think of something negative, and then start to dwell on that negative, and start to call to mind every other negative thing that has happened to them, and so their state of mind is completely geared to seeing everything in a negative light - as a direct result of the chemistry of their body being enforced by the physical affects of their fear, anxiety, and hopelessness, which are both triggers for, and reactions to, the downward-spiralling depressive state.
When the faithful person prays regularly, they have a sense of hope and optimism, and they start to dwell on positive thoughts. People can see that they are more positive not because some external spirit creature has blessed him, but because his own body chemistry is being brought back into balance by his own thoughts.