How we keep our online surveys from running too long
While there is no magic length that an online survey should be, Pew Research Center caps the length of its online American Trends Panel surveys at 15 minutes.
Numbers, Facts and Trends Shaping Your World
Only a few decades ago, a Christian identity was so common among Americans that it could almost be taken for granted. As recently as the early 1990s, about 90% of U.S. adults identified as Christians. But today, about two-thirds of adults are Christians.[6. numoffset=”6″ This chapter focuses on results of public opinion surveys of U.S. […]