Methods

Our latest Methods 101 video explains the basics of machine learning and how it allows our researchers to analyze data on a large scale.

We explain the basics of machine learning – using computer programs to identify patterns in data – and how it allows researchers at the Center to analyze data on a large scale.

Relatively few Americans say they have tested positive for coronavirus antibodies, but many more believe they may have been infected.

Distress levels changed little overall from March to April, but this concealed considerable change at the individual level over this period.

Our response to the pandemic has included the difficult decision to suspend much of our international survey work until further notice.

While the growth of online interviewing is a prominent trend in polling, there is variation within that trend in how researchers recruit respondents. This study finds that sourcing affects data quality.

Our director of journalism studies explains how we determined what media outlets Americans turn to and trust for their political news.

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.

In this Q&A and video, learn about the methods and data sources the Center used to estimate the number of unauthorized immigrants in Europe.

While the notion that polls should include equal numbers of Republicans and Democrats makes some sense, it’s based on a misunderstanding of what polling is intended to do.