Research published in 2004 found that strongly handed individuals were more likely to believe in biblical creationism rather than biological evolution. The original study proposed that strongly handed individuals were less likely to update their beliefs in light of evidence. But Chan wondered if other factors could explain the association.
The new study of 743 U.S. adults confirmed that handedness was correlated to religiosity. The strongly handed participants were more likely to agree with statement such as “There is a personal God” while disagreeing with statement such as “Religion makes people do stupid things.”
Chan also found evidence that authoritarianism mediated the relationship between handedness and religiosity. In other words, strongly handed individuals tended to score higher on a measure of right-wing authoritarianism, which in turn was associated with stronger religious belief.
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