Evangelical Protestants have become more devoted to their religious beliefs over the last three decades, even as Catholics have become less attached to their faith, new research finds.
The denominational differences come even as religious affiliations have decreased overall in America, with the number of people who claim no religious affiliation at all doubling from 7 percent in 1990 to 14 percent in 2000, said study researcher Philip Schwadel, a sociologist at the University of Nebraska, Lincoln.
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