I wrote:
"It doesn't mean that any particular atheist is going to be smarter than any particular religious person. The distributions have way too much overlap to conclude that."
Yes, that is true, for almost every distribution hehe But distributions show general trends; generalizations, never about 1:1 specific individuals.
My intention there was simply to place an intellectual speed-bump in front of the common atheist boast: 'Atheists are smarter than religious people. I'm an atheist. You're a religious person. Therefore I'm smarter than you.'
But the point of this study was to use the one thing they all share in common, religion, to make the distinction.
Sure, likely because that makes atheists look good. (Many "studies" in the so-called "social sciences" are thinly disguised special-pleading crafted to favor some group or cause.)
There are peaks and troughs to every distribution, if you start pointing to the peaks and not the troughs, then you start to cherrypick.
If somebody wants to compare things, then he or she is inevitably going to have to choose what to compare.
My point was simply to point out that while atheists can make the boast that atheists are smarter (statistically on average, and perhaps only by a small margin) than self-identified religious adherents lumped together as a whole, members of a number of religious denominations and traditions can probably make similar boasts about their own group's statistical superiority compared to atheists.
According to the 2008 American Religious Identification Survey (ARIS), 27% of the adult (25 and over) American population are college graduates. 31% of those who say that they adhere to no religion are college graduates. (Sounds good for the atheists, right?) But 59% of self-identified adherents of 'Eastern Religions' (about 55% of whom are Buddhists) are college graduates. My speculation is that this population will show higher average IQ scores as well, compared both to the general population and to the 'none's, since IQ scores tend to be positively correlated with educational levels.
In other words, things might not be quite as simple and obvious as they seem at first. If we look at these kind of matters more closely, the atheists aren't necessarily going to be the ones who end up on the top of the heap.
So, if the intention in this thread was to suggest that religious adherence makes people stupid, or alternatively, that stupid people are drawn disproportionately towards religious adherence, we probably need to be aware that others can make similar arguments. Adherents of 'eastern religions' could make the claim that their traditions make people smarter, or alternatively, that smart people are drawn disproportionately towards eastern religions.
I think that in the United States context, the latter claim would probably be true. A significant percentage of American adherents of eastern religions are converts to those traditions, and these kind of conversions seem to be disproportionately frequent among university educated people. I'd speculate that's because there is greater flexibility of thought in this population, along with greater knowledge of these otherwise unfamiliar traditions.
I'm doubtful that we would see the same kind of selection-effect back in Asia, where these 'eastern' religious traditions are going to be the native default conditions into which most people are simply born and about which many people probably give little thought. (Like the position of Christianity here in the US.)