Numbers, Facts and Trends Shaping Your World

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    Methodology

    The American Trends Panel (ATP), created by Pew Research Center, is a nationally representative panel of randomly selected U.S. adults recruited from landline and cellphone random-digit-dial (RDD) surveys. Panelists participate via monthly self-administered web surveys. Panelists who do not have internet access are provided with a tablet and wireless internet connection. The panel is being […]

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    1. Recent trends in naturalization, 1995-2015

    In 2015, 67% of lawful permanent residents eligible to become U.S. citizens had done so, the highest level in two decades and a 20-percentage-point increase since 1995. The population of naturalized U.S. citizens reached 19.8 million in 2015, a historic high that reflects both an increase in the population of eligible immigrants and an increased […]

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    Terminology

    Google Health Application Programming Interface (API) An API is a means of collecting data programmatically, allowing access to data that are difficult to collect by hand. The Google Health API was launched in 2009 to help researchers detect patterns in searches around the flu as a means for predicting its spread. For a given search […]

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    Methodology

    About the Pew Research Center’s Spring 2017 Global Attitudes Survey Results for the survey are based on telephone interviews conducted under the direction of Princeton Survey Research Associates International. The results are based on national samples, unless otherwise noted. More details about our international survey methodology and country-specific sample designs are available here. Detailed information […]