American Voices on Ways Human Enhancement Could Shape Our Future
Focus group participants discuss biomedical developments that could boost the performance of people’s bodies and brains
Numbers, Facts and Trends Shaping Your World
The rise of the Zika virus has caught public attention, and people are particularly worried about its threat to pregnant women
Online nonprobability surveys are fast, cheap, and increasingly popular. We compared nine samples and found that accuracy varied substantially.
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 […]