report | Jun 9, 2021

Measuring the Risks of Panel Conditioning in Survey Research

A new evaluation of the Center's national American Trends Panel finds little evidence that panel estimates are affected by errors associated with panel conditioning, a phenomenon that occurs when survey participation changes respondents’ true or reported behavior over time.

report | May 3, 2021

How Pew Research Center Uses Its National Public Opinion Reference Survey (NPORS)

In 2020, Pew Research Center launched a new project called the National Public Opinion Reference Survey (NPORS). NPORS is an annual, cross-sectional survey of U.S. adults. Respondents can answer either by paper or online, and they are selected using address-based sampling from the United States Postal Service’s computerized delivery sequence file.

report | Apr 8, 2021

Confronting 2016 and 2020 Polling Limitations

Looking at final estimates of the outcome of the 2020 U.S. presidential race, 93% of national polls overstated the Democratic candidate’s support among voters, while nearly as many (88%) did so in 2016.

report | Aug 18, 2020

A Resource for State Preelection Polling

If a battleground state poll does not adjust for having too many college graduates, it is at risk of overstating support for a Democratic presidential candidate. The Current Population Survey provides high-quality data that can mitigate overrepresentation of college graduates.

presentation | Jun 25, 2020

The coronavirus pandemic’s impact on our polling

Associate Director for International Research Methods Patrick Moynihan explored the impacts of the coronavirus pandemic on survey research globally as part of an online conference hosted by the Centre for Social Research and Methods at Australian National University.

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