By Pew Research Center's Religion & Public Life Project Question 1 How does Pew Research Center measure the religious identity of survey respondents and the religious composition of the U.S.? Answer: Generally, we rely on respondents’ self-identification. A key question we ask in many surveys is: “What is your present religion, if any? Are you Protestant, Roman Catholic, Mormon, Orthodox such as Greek or […] …read more

Source:: Pew Research Center