Washington, D.C. ? Most Americans say they know little to nothing about the practices of Islam and Mormonism but say their own religious beliefs have little in common with either of these faiths, according to a national survey released Tuesday.

Forty-five percent of those polled said Islam is more likely than other religions to encourage violence among its believers. Nearly one in three respondents say Mormonism is not a Christian religion, the report said.

The survey of 3,002 Americans was conducted by the Pew Research Center for the People and the Press and the Pew Forum on Religion and Public Life with margin of error of plus or minus 2 percentage points. It is available at www.pewforum.org.

Although 58 percent of respondents said they knew little or nothing about Islamic practices, 70 percent of non-Muslims said Islam is very different from their own religion.