Evaluating Online Nonprobability Surveys
Online nonprobability surveys are fast, cheap, and increasingly popular. We compared nine samples and found that accuracy varied substantially.
Numbers, Facts and Trends Shaping Your World
Online nonprobability surveys are fast, cheap, and increasingly popular. We compared nine samples and found that accuracy varied substantially.
There are two indicators of voter turnout available for the type of analysis in this report: (1) each respondent’s self-report in the post-election survey and (2) a voter file record of turnout. Among registered voters, 63% have a voter file record indicating that they voted in 2014 (“verified voters”) and 75% said they voted (“self-reported […]
Highly religious people are distinctive in their day-to-day behaviors in several key ways: They are more engaged with their families, more involved in their communities and more likely to report being happy with the way things are going in their lives. In other ways, however, there is little discernible difference in the way highly religious […]
To better understand the current landscape of commercially available online nonprobability samples, Pew Research Center conducted a study in which an identical questionnaire was administered to nine samples supplied by eight different vendors along with the Center’s probability-based online panel. A benchmarking analysis – in which a subset of each survey’s results was compared to […]
A new Pew Research Center study of the ways religion influences the daily lives of Americans finds that people who are highly religious are more engaged with their extended families, more likely to volunteer, more involved in their communities and generally happier with the way things are going in their lives.