MethodsAugust 6, 2018

Video Explainer: What are nonprobability surveys?

Our latest Methods 101 video explores some of the ways these surveys differ from traditional probability-based polls.

Internet & TechApril 9, 2018

Bots in the Twittersphere

An estimated two-thirds of tweeted links to popular websites are posted by automated Twitter accounts – not human beings.

MethodsMarch 21, 2018

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.

MethodsMay 12, 2017

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.

MethodsNovember 15, 2016

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