Survey: Americans don't know much about religion

A new survey of Americans' knowledge of religion found that atheists, agnostics, Jews and Mormons outperformed Protestants and Roman Catholics in answering questions about major religions, while many respondents could not correctly give the most basic tenets of their own faiths.

Forty-five percent of Roman Catholics who participated in the study didn't know that, according to church teaching, the bread and wine used in Holy Communion is not just a symbol, but becomes the body and blood of Christ.

More than half of Protestants could not identify Martin Luther as the person who inspired the Protestant Reformation. And about four in 10 Jews did not know that Maimonides, one of the greatest rabbis and intellectuals in history, was Jewish.

Respondents to the survey were asked 32 questions with a range of difficulty, including whether they could name the Islamic holy book and the first book of the Bible, or say what century the Mormon religion was founded. On average, participants in the survey answered correctly overall for half of the survey questions.

Atheists and agnostics scored highest, with an average of 21 correct answers, while Jews and Mormons followed with about 20 accurate responses. Protestants overall averaged 16 correct answers, while Catholics followed with a score of about 15.

Not surprisingly, those who said they attended worship at least once a week and considered religion important in their lives often performed better on the overall survey. However, level of education was the best predictor of religious knowledge. The top-performing groups on the survey still came out ahead even when controlling for how much schooling they had completed.