Numbers, Facts and Trends Shaping Your World
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Online nonprobability surveys are fast, cheap, and increasingly popular. We compared nine samples and found that accuracy varied substantially.
By Courtney Kennedy, Kyley McGeeney and Scott Keeter Now that over 90% of U.S. adults have cellphones,[1. Stephen J. Blumberg and Julian V. Luke. Wireless substitution: Early Release of Estimates From the National Health Interview Survey, July–December 2015. National Center for Health Statistics. May 2016. Available from: http://www.cdc.gov/nchs/nhis.htm] survey researchers are considering whether it is necessary […]
Many nonprobability sample vendors have the ability to provide samples of respondents that, by design, are forced to align with characteristics of the U.S. population. Often those characteristics are demographics such as gender and age, though some vendors also use nondemographic variables. When a vendor forces the sample to match the population on a particular […]
This report is a collaborative effort based on the input and analysis of the following individuals: Primary Researchers Scott Keeter, Senior Survey Advisor Ruth Igielnik, Research Associate Andrew Mercer, Research Methodologist Jocelyn Kiley, Associate Director, Research Collaborating Researchers Claudia Deane, Vice President, Research Michael Dimock, President Ken Goldstein, University of San Francisco Courtney Kennedy, Director […]
Standard lists of history’s most influential religious leaders – among them Abraham, Moses, Jesus, Muhammad, Siddhartha Gautama (the Buddha) – tend to be predominantly, if not exclusively, male. Many religious groups, including Roman Catholics and Orthodox Jews, allow only men to be clergy, while others, including some denominations in the evangelical Protestant tradition, have lifted that restriction only in recent decades. Yet it often appears that the ranks of the faithful are dominated by women.