Posted: May 27, 2011 7:08 pm
by Lazar
quisquose as I mentioned above this phenomena is called the eccological fallacy. It was first discussed in a study which showed that the correlation between number of immigrants and literacy was positive at the state level but at the individual level the correlation between being an immigrant and literacy was negative. This is why it is dangerous to make comparisons from research on groups and apply them to individuals within that group. In this case the effect occured because immigrants tend to move to states with the highest english literacy levels despite generally having lower english literacy levels themselves.

As for four, the correlation between religiousity and health outcomes is well documented and you can find a buch of studies on it in the many religion and mental illness threads here on this forum. The point we come to in all these threads however is that religiosity is not the cause of this but things associated with religiosity.