What is machine learning, and how does it work?
Our latest Methods 101 video explains the basics of machine learning and how it allows our researchers to analyze data on a large scale.
Numbers, Facts and Trends Shaping Your World
Our latest Methods 101 video explains the basics of machine learning and how it allows our researchers to analyze data on a large scale.
United Kingdom legislators in the House of Lords and House of Commons tweeted more critical content of Trump’s recent visit to the nation.
The Center conducts polls in many countries other than the U.S. – but the methodology behind our international surveys can vary.
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.
Pew Research Center conducts surveys over the phone and, increasingly, online. But these two formats don’t always produce identical results.
Jeffrey S. Passel, senior demographer, on the research techniques used to derive the unauthorized immigrant population estimate in the U.S. and the challenges involved.
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.
Donald Trump’s victory in 2016 and the U.K. “Brexit” decision rattled public confidence in polls. Our new video explains why well-designed polls can be trusted.
In the second video from our Methods 101 series, we’re tackling why question wording is so important in public opinion surveys.
Read key findings and watch a video about our new study on how bot accounts affect the mix of content on Twitter.
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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.
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