Video Explainer: What are nonprobability surveys?
Our latest Methods 101 video explores some of the ways these surveys differ from traditional probability-based polls.
Bots in the Twittersphere
An estimated two-thirds of tweeted links to popular websites are posted by automated Twitter accounts – not human beings.
Video Explainer: Understanding 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.
Video Explainer: Understanding random sampling for public opinion surveys
The first video in our “Methods 101” series is about random sampling, a concept that undergirds all probability-based survey research. Here’s how it works.
Video: Why 2016 election polls missed their mark
The results of the 2016 presidential election came as a surprise to nearly everyone who had been following the national and state election polling