When we look in the mirror, it’s easy to see not only the physical attributes that define our unique features, but also the layers beneath that makeup who we are — those tired eyes given as a gift of ...

A graphic by the American Association for Public Opinion Research shows how margins of errors are calculated based on the population a researcher wants to know about and the sample size they use.

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Academic survey researchers tend to differ ...