But anyway, that's not what I wanted to talk about. At the very bottom of the article they had a section on literacy vs. religious belief. They used a program to analyse the reading/writing level of the text contained on each profile, and sorted the profiles by religious belief. You probably won't be surprised by the results.
Then they made another graph sorting each religious group (and non-religious) into 3 categories, 'not serious', 'somewhat serious' and 'very serious'. You probably won't be surprised by the results in that graph either.
As you can see, for all the religious groups but two, the 'somewhat serious' group were the dumbest, followed by the 'very serious'. In all the religious groups, the people who were least serious about their belief were the most intelligent in their group. That brings us to the agnostic and atheist groups. The results were flipped for atheists and agnostics, the more serious they were about their non-belief, the higher their literacy was.
Another VERY interesting result from these graphs was how the religions compared. No surprises that protestants were at the bottom of the heap, it's almost impossible to drag that number up no matter how many intelligent protestants there are. Protestants are more likely to be creationists and biblical literalists than Catholics, who didn't fare much better.
Please note: I'm not taking this as conclusive proof that Christianity rots your brain, I just find it incredibly interesting. The results speak for themselves, and most other major studies done in this area have found similar results.