The topic of religiosity and intelligence is the relationship between intelligence and religiosity. A number of studies have examined these relationships, while other studies have explored the link between religiosity and issues related to intelligence such as educational level. IQ vs. Religiosity Begs two quesitons. 1 Is there a relationship between religiosity and intelligence? 2 Which is the cause and effect, does religiousity cause lower IQ or does lower IQ cause religiousity?