October 11, 2016

Democrats Maintain Edge as Party ‘More Concerned’ for Latinos, but Views Similar to 2012


Results for this study are based on telephone interviews conducted by SSRS, an independent research company, for Pew Research Center among a nationally representative sample of 1,507 Latino respondents ages 18 and older. It was conducted on cellular and landline telephones from Aug. 23 through Sept. 21, 2016.

For the full sample, a total of 689 respondents were U.S. born (including Puerto Rico), and 818 were foreign born (excluding Puerto Rico). For results based on the total sample, one can say with 95% confidence that the error attributable to sampling is plus or minus 3.3 percentage points.

For this survey, SSRS used a staff of bilingual English and Spanish-speaking interviewers who, when contacting a household, were able to offer respondents the option of completing the survey in Spanish or English. A total of 759 respondents (50%) were surveyed in Spanish, and 748respondents (50%) were interviewed in English. Any person age 18 or older who said they were of Hispanic/Latino origin or descent was eligible to complete the survey.

To ensure the highest possible coverage of the eligible population, the study employed a dual-frame landline/cellphone design. The sample consisted of a landline sampling frame (yielding 300 completed interviews) and a cellphone sampling frame (1,207 interviews).4 Both the landline and cellphone sampling frames used a stratified sampling design, oversampling areas with higher densities of Latino residents. Overall, the study employed six strata. Landline and cellphone samples were provided by Marketing Systems Group (MSG).

For the landline sampling frame, the sample was compared with InfoUSA and Experian landline household databases, and phone numbers associated with households that included people with known Latino surnames were subdivided into a surname stratum. The remaining, unmatched and unlisted landline sample was used to generate a stratum with a high incidence of Latinos, based on the share of Latinos in the sample telephone exchange.

It is important to note that the existence of a surname stratum does not mean the survey was exclusively a surname sample design. The sample is RDD (random-digit dial), with the randomly selected telephone numbers divided by whether or not they were found to be associated with a Spanish surname. This was done to ease administration by allowing for more effective assignment of interviewers and labor hours, as well as increase the efficiency of the sample.

MSG’s GENESYS sample generation system was used to generate cellphone sample, which was divided into high and medium strata, based on the share of Latinos in the sample telephone area code.

Samples for the low-incidence landline and low-incidence cell strata were drawn from previously interviewed respondents in SSRS’s weekly dual-frame Excel omnibus survey. Respondents who indicated they were Latino on the omnibus survey were eligible to be recontacted for the present survey. Altogether, a total of 270 previously interviewed respondents were included in this sample.

A multistage weighting procedure was used to ensure an accurate representation of the national Hispanic population.

Pew Research Center undertakes all polling activity, including calls to mobile telephone numbers, in compliance with the Telephone Consumer Protection Act and other applicable laws.

  1. According to calculations by the National Center for Health Statistics National Health Interview Survey (NHIS), from July to December 2015, 60.5% of Hispanic adults were living in wireless-only households and 15% were in wireless-mostly households (Blumberg and Luke, 2016).