About the study:
Interviews were conducted via telephone (including both landline and cell phone) between March 3 and April 8, 2014, among a nationally representative sample of 2,505 adults age 18 and older. The interviews were conducted in English and Spanish. To compensate for known biases and variations in probability of selection within and across households, sample data were weighed by household size, cell phone/landline use and demographics to reflect the true population. Random-digit dialing, replicate subsamples, and systematic respondent selection within households, were used to ensure that the sample is representative.