Short Read | Nov 1, 2018
Exit polls, election surveys and more: A guide for the 2018 midterms

On election night 2018, besides the exit polls there will be an additional source of data on who voted and why, developed by The Associated Press, Fox News and NORC at the University of Chicago and based on a very different methodology. That means that depending on where you go for election news, you may get a somewhat different portrait of this year's electorate.

Short Read | Aug 29, 2018
Q&A: The challenges of creating a religious typology

This new analysis creates a typology that cuts across denominations, sorting Americans into seven groups, or “clusters,” based on their religious practices and values, their views about religion in general, and the sources of meaning and fulfillment in their lives. Rich Morin, a senior editor at the Center, explains how the study was put together, and discusses the role of cluster analysis in creating the typology.

Short Read | Aug 6, 2018
What are nonprobability surveys?

Many online surveys are conducted using “nonprobability” or “opt-in” samples, which are generally easier and cheaper to conduct. In our latest Methods 101 video, we explore some of the features of nonprobability surveys and how they differ from traditional probability-based polls.

Short Read | Aug 3, 2018
When writing about survey data, 51% might not mean a ‘majority’

For many people, “majority” is a word so common that they rarely have to think twice about what it means. But it’s a different matter for polling organizations like Pew Research Center. At the Center, writers cannot label a survey finding a “majority” unless it meets specific criteria.

Report | Jul 5, 2018
How Does Pew Research Center Measure the Religious Composition of the U.S.? Answers to Frequently Asked Questions

Question 1: Measuring religious identity How does Pew Research Center measure the religious identity of survey respondents and the religious composition of the U.S.? Answer: Generally, we rely on respondents’ self-identification.  A key question we ask in many surveys is: “What is your present religion, if any? Are you Protestant, Roman Catholic, Mormon, Orthodox such […]

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Signature Reports

Mar 31, 2017
Are Telephone Polls Understating Support for Trump?

An experiment comparing responses to 27 questions fielded on both a telephone and a web survey found no significant mode differences in overall opinion about Trump or many of his signature policy positions.

Features

Feature | Jul 16, 2019
Methods 101 Video: How is polling done around the world?

International polling provides information about how people in different countries are thinking about issues like immigration, technology, religion, you name it. But polling in different parts of the world can be very challenging, because what works in one country may not work in a different country.

Feature | May 14, 2018
Video: Can we still trust polls?

Recent events – including the 2016 presidential election and Brexit – have rattled public confidence in polls. But this video explains why well-designed polls can still be trusted and remain an important way to measure public opinion.

Feature | Mar 21, 2018
Methods 101 Video: Survey Question Wording

The second video in Pew Research Center’s Methods 101 series helps explain question wording – a concept at the center of sound public opinion survey research – and why it’s important.

Feature | May 12, 2017
Methods 101 Video: Random Sampling

The first video in Pew Research Center’s Methods 101 series helps explain random sampling – a concept that lies at the heart of all probability-based survey research – and why it’s important.