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    Comparing Two Types of Online Survey Samples

    Pew Research Center conducted a study to compare the accuracy of six online surveys of U.S. adults – three from probability-based panels and three from opt-in sources. On average, the absolute error on opt-in samples was about twice that of probability-based panels.

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    2023 National Public Opinion Reference Survey (NPORS) Methodology

    Summary Ipsos conducted the National Public Opinion Reference Survey (NPORS) for Pew Research Center using address-based sampling and a multimode protocol. The survey was fielded from May 19 to Sept. 5, 2023. Participants were first mailed an invitation to complete an online survey. A paper survey was later mailed to those who did not respond. […]

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    2023 National Public Opinion Reference Survey (NPORS) Methodology

    Summary Ipsos conducted the National Public Opinion Reference Survey (NPORS) for Pew Research Center using address-based sampling and a multimode protocol. The survey was fielded from May 19 to Sept. 5, 2023. Participants were first mailed an invitation to complete an online survey. A paper survey was later mailed to those who did not respond. […]

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    Methodology

    The American Trends Panel survey methodology Overview The American Trends Panel (ATP), created by Pew Research Center, is a nationally representative panel of randomly selected U.S. adults. Panelists participate via self-administered web surveys. Panelists who do not have internet access at home are provided with a tablet and wireless internet connection. Interviews are conducted in […]

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    Methodology

    About Pew Research Center’s Spring 2024 Global Attitudes Survey Results for the survey are based on telephone, face-to-face and online interviews conducted under the direction of Gallup, Langer Research Associates, Social Research Centre and Verian. The results are based on national samples, unless otherwise noted. Here are more details about our international survey methodology and […]

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