Religiosity as a predictor of in-group favoritism within and between religious groups

Article history: Received 6 March 2016 Received in revised form 17 April 2016 Accepted 18 April 2016 Available online xxxx It was hypothesized that religiosity is positively associated with religious in-group favoritism. This hypothesis was tested using the second wave of data from the Midlife in the United States representative survey of middle adulthood. The sample included White participants from four religious groups (Baptists, Catholics, Methodists, and Jews). Consistent with the hypothesis, when analyzing the full sample and within each of the four religious groups, religiositywas predictive of in-group favoritism. However, while differences between religious groups in in-group favoritism emerged, and remainedwhen controlling for the previously found group differences in intelligence and personality, the group differences in in-group favoritismwere not mediated by religiosity. For example, while Baptists scored high in both religiosity and in-group favoritism, Jews scored low in religiosity yet high in in-group favoritism. Possible explanations for these findings are discussed, such as genetic similarity among group members. © 2016 Elsevier Ltd. All rights reserved.