Results for this survey are based on telephone interviews conducted November 11-14, 2010 among a national sample of 1,001 adults 18 years of age or older living in the continental United States (670 respondents were interviewed on a landline telephone, and 331 were interviewed on a cell phone, including 136 who had no landline telephone). […]

Results for this report are based on telephone interviews among a nationwide sample of 1,000 adults, 18 years of age or older, conducted Dec. 4-7, 2008 under the direction of ORC (Opinion Research Corporation). For results based on the total sample, one can say with 95% confidence that the error attributable to sampling is plus […]