This survey is based on the results of 402 interviews with a representative sampling of adults (18+) living in the continental United States, contacted using random-digit dialing (RDD) techniques to ensure a proportionate reach of both listed and unlisted residential households. Sex, age, race, and geographic sampling controls were imposed to within +5% of Census-based population projections.

To ensure their adequate representation in the overall sample, non English-speaking Hispanics were asked for basic demographics but were otherwise not asked to participate in the rest of the survey.