This global poll of Catholics was conducted by Bendixen & Amandi International for Univision. Interviews were conducted in the native language in each of the 12 countries on landlines and cellphones or in person from Dec. 18, 2013, to Jan. 15, 2014. At least 1,000 interviews were conducted in each country, with the results having a margin of sampling error of plus or minus 3.5 percentage points for each country.