Our latest Methods 101 video explores some of the ways these surveys differ from traditional probability-based polls.
An estimated two-thirds of tweeted links to popular websites are posted by automated Twitter accounts – not human beings.
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.
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.
The results of the 2016 presidential election came as a surprise to nearly everyone who had been following the national and state election polling