Twin Studies and the Role of Genetics in Religious Belief
Briefly

Twin Studies and the Role of Genetics in Religious Belief
"I recently studied a 12-year-old identical male twin pair-Jim and Carl. Interestingly, their mother revealed that her twins were being raised in different religions, i.e., her husband's and her own-her husband is Jewish, and she is Lutheran. The couple agreed that if the twins were to choose the same religion when they are older, that would be fine with them."
"This is an unusual situation for several reasons. (1) It creates differences between the brothers from an early age. Each twin would be exposed to different religious beliefs and practices, and (2) each twin would become part of a different community, leading to individual friendships. It is interesting to speculate as to how the twins' outcomes might evolve. First, let's look at twin studies of religiosity, namely interests and involvement in religion."
Parental guidance largely determines participation and interest in religion during childhood. Genetic influences on religious participation and interest emerge during adulthood. Identical twins reared apart display striking similarity in religious involvement. A 12-year-old identical twin pair was raised in different religions, creating early differences in beliefs, practices, and communities. Early twin studies of young twins raised together found little genetic effect because parental guidance minimized differences between identical and fraternal pairs. Later studies of older and reared-apart twins found greater resemblance among identical than fraternal pairs across measures of religious leisure, occupational interests, activities, leisure time interests, and values.
Read at Psychology Today
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