Religious people are less intelligent than atheists
The review, which is the first systematic meta-analysis of the 63 studies conducted in between 1928 and 2012, showed that of the 63 studies, 53 showed a negative correlation between intelligence and religiosity, while 10 showed a positive one. Only two studies showed significant positive correlations and significant negative correlations were seen in a total of 35 studies.
The authors of the review looked at each study independently, taking into account the quality of data collection, the size of the sample and the analysis methods used. The three psychologists carrying out the review defined intelligence as the “ability to reason, plan, solve problems, think abstractly, comprehend complex ideas, learn quickly, and learn from experience”.
Religiosity is defined by the psychologists as involvement in some (or all) facets of religion. According to the review, other factors - such as gender or education - did not make any difference to the correlation between intelligence and religious belief. The level of belief, or otherwise, did however vary dependent upon age with the correlation found to be weakest among the pre-college population.
The paper concludes that: "Most extant explanations (of a negative relation) share one central theme —the premise that religious beliefs are irrational, not anchored in science, not testable and, therefore, unappealing to intelligent people who 'know better'." Criticisms of the conclusions include that the paper only deals with a definition of analytic intelligence and fails to consider newly identified forms of creative and emotional intelligence.
The psychologists who carried out the review also sought to pre-empt the secularist interpretation of the findings by suggesting that more intelligent people are less likely to have religious beliefs as they associate themselves with ideas around personal control. "Intelligent people typically spend more time in school - a form of self-regulation that may yield long-term benefits," the researchers wrote. "More intelligent people get higher level jobs (and better employment (and higher salary) may lead to higher self-esteem, and encourage personal control beliefs."
Rob Williams