One reason why so many comments on this board seem to lean toward religion is because this board has long been known as a place where Anti Theists use their view of Science to attack religion.
But since atheists have called for a psychological analysis of belief, lets take a look at the other side...
http://www.catholiceducation.org/articl ... ml?id=4369Also, for those who reject Free Will this article considers some of the ways in which Atheism is Psychologically determined.