Christians tend to pray for things like the strength to persevere and moral support through times of emotional stress. The action of praying, does indeed, work for them when they pray for such things. Of course, atheists believe it is a placebo effect, but that does not make it any less effective. These same Christians think that their prayers will also work for other people. Telling someone, "I'll pray for you." might work for that person, because that person believes that it will... and again... the placebo effect.
That's got a lot to do with why they think prayer works, me thinks.
That's got a lot to do with why they think prayer works, me thinks.