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.
What 2020’s Election Poll Errors Tell Us About the Accuracy of Issue Polling
Given the errors in 2016 and 2020 election polling, how much should we trust polls that attempt to measure opinions on issues?
Most Americans don’t answer cellphone calls from unknown numbers
Eight-in-ten Americans say they don’t generally answer their cellphone when an unknown number calls, our survey found.
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.
Response rates in telephone surveys have resumed their decline
Response rates to telephone public opinion polls conducted by Pew Research Center have resumed their decline, to 7% in 2017 and 6% in 2018.
What our transition to online polling means for decades of phone survey trends
What does the migration to online polling mean for the country's trove of public opinion data gathered over the past four decades?
Phone vs. online surveys: Why do respondents’ answers sometimes differ by mode?
Pew Research Center conducts surveys over the phone and, increasingly, online. But these two formats don’t always produce identical results.
Comparing Survey Sampling Strategies: Random-Digit Dial vs. Voter Files
A new telephone survey experiment finds that an opinion poll drawn from a commercial voter file produces results similar to those from a sample based on random-digit dialing.
Many poll respondents guess wrong on their interviewer’s race or ethnicity
Establishing the interviewer’s perceived race or ethnicity is essential to understanding how it might affect the respondent’s answers to survey questions.
Personal finance questions elicit slightly different answers in phone surveys than online
People polled by telephone are slightly less likely than those interviewed online to say their personal finances are in “poor shape."
About Pew Research Center Pew Research Center is a nonpartisan fact tank that informs the public about the issues, attitudes and trends shaping the world. It conducts public opinion polling, demographic research, media content analysis and other empirical social science research. Pew Research Center does not take policy positions. It is a subsidiary of The Pew Charitable Trusts.