Public Opinion Poll Methodology
This Science and Policy study was conducted by telephone within the
United States by Harris Interactive on behalf of Research! America and
ScienceDebate.org between May 2 and May 5, 2008 among 1,003 U.S adults
ages 18+. This survey has a theoretical sampling error of ±3.1%.
Results were weighted for age, sex, geographic region, and race where necessary to align them with their actual proportions in the population.