Numbers, Facts and Trends Shaping Your World

Methodological Research

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Public Opinion Polling Basics

By the end of our free, five-lesson course, you will know why we have polls, what the different kinds of polls are, how polling works and what you should look for in a poll.

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    A Comparison of Results from Surveys by the Pew Research Center and Google Consumer Surveys

    As internet use grows– whether through a traditional computer, tablet, gaming device or cell phone – new techniques are being developed to conduct social research and measure people’s behavior and opinion while they are online. The Pew Research Center has been exploring these new techniques for measuring public opinion and critically evaluating how they compare […]

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    Assessing the Representativeness of Public Opinion Surveys

    Overview For decades survey research has provided trusted data about political attitudes and voting behavior, the economy, health, education, demography and many other topics. But political and media surveys are facing significant challenges as a consequence of societal and technological changes. It has become increasingly difficult to contact potential respondents and to persuade them to […]

Signature Reports

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A Field Guide to Polling: Election 2020 Edition

While survey research in the United States is a year-round undertaking, the public’s focus on polling is never more intense than during the run-up to a presidential election.

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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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How Public Polling Has Changed in the 21st Century

A new study found that 61% of national pollsters used different methods in 2022 than in 2016. And last year, 17% of pollsters used multiple methods to sample or interview people – up from 2% in 2016.