Survey Methodology
How modern polls are conducted: phone, online, and mixed-mode surveys, with the tradeoffs each method involves.
Phone, Online, and Mixed-Mode
For decades, telephone surveys using random digit dialing were the gold standard. Pollsters called randomly generated phone numbers, reaching a near-random sample of the population. Response rates in the 1970s exceeded 70%. By 2020, response rates had plummeted to roughly 6%, raising serious questions about who still answers the phone.
Online surveys have filled the gap. Firms like YouGov maintain large panels of respondents who agree to take regular surveys. Online methods are faster and cheaper but face their own challenges: people who join online panels are not representative of the population, requiring heavy statistical adjustments. Mixed-mode surveys combine phone and online methods, attempting to reach different demographic groups through different channels.