Survey questions raising concerns in middle schools: *The last time you engaged in sexual activity, did you use one of the following to protect yourself from sexually transmitted diseases (STDs)?

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Among the tools that survey researchers use to gain a deeper understanding of ...

By Courtney Kennedy, Andrew Mercer, Scott Keeter, Nick Hatley, Kyley McGeeney and Alejandra Gimenez As the costs and nonresponse rates of traditional, probability-based surveys seem to grow each year, ...