The results in this report for adults age 18 and older are based on data from telephone interviews conducted by Princeton Survey Research Associates International from January 20 to February 19, 2012, among a nationally representative sample of 2,253 adults, age 18 and older.  Telephone interviews were conducted in English and Spanish by landline and cell phone. For results based on the total sample, one can say with 95% confidence that the error attributable to sampling is plus or minus 2.3 percentage points.

The results in this report for teens ages 12-17 are based on data from telephone interviews conducted by Princeton Survey Research Associates International from April 19 to July 14, 2011, among a nationally representative sample of 799 teens ages 12 to 17 years old and their parents living in the continental United States. Telephone interviews were conducted in English and Spanish by landline and cell phone. Statistical results are weighted to correct known demographic discrepancies. For results based on the total sample, one can say with 95% confidence that the error attributable to sampling is plus or minus 4.8 percentage points.