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    Human Enhancement

    The scientific and ethical dimensions of striving for perfection

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    Methodology

    Survey methods The survey date used in this report is based on telephone interviews conducted Feb. 29 to May 8, 2016, among a national sample of 3,769 adults, 18 years of age or older, living in all 50 U.S. states and the District of Columbia (977 respondents were interviewed on a landline telephone, and 2,792 […]

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    Methodology

    The analysis is based on the 1880 to 2000 decennial censuses and the 2006 to 2014 American Community Survey (ACS). The Census Bureau began collecting the ACS in 2001 and in 2006 expanded its coverage to the entire residential population, thus making it comparable to the earlier censuses. The ACS was designed to collect detailed […]

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    2. Candidates differ in their use of social media to connect with the public

    A new Pew Research Center analysis of three weeks of the candidates’ Facebook and Twitter accounts finds both similarities and differences in the ways Hillary Clinton, Donald Trump and Bernie Sanders use these still relatively new campaign tools. The study of 714 tweets and 389 Facebook posts made by the candidates between May 11 and […]

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    Methodology

    The analysis in this report is based on telephone interviews conducted April 12-19, 2016 among a national sample of 2,008 adults, 18 years of age or older, living in all 50 U.S. states and the District of Columbia (505 respondents were interviewed on a landline telephone, and 1,503 were interviewed on a cell phone, including […]

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    Methodology

    Survey conducted March 2-28, 2016 and April 5-May 2, 2016 The American Trends Panel (ATP), created by the Pew Research Center, is a nationally representative panel of randomly selected U.S. adults living in households. Respondents who self-identify as internet users and who provided an email address participate in the panel via monthly self-administered Web surveys, […]

  • report

    Methodology

    The analysis in this report is based on telephone interviews conducted April 12-19, 2016 among a national sample of 2,008 adults, 18 years of age or older, living in all 50 U.S. states and the District of Columbia (505 respondents were interviewed on a landline telephone, and 1,503 were interviewed on a cell phone, including […]

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    Methodology

    The analysis in this report is based on two nationally representative telephone surveys conducted in the United States in 2014 and 2009. For both of the surveys, interviews were conducted in English and Spanish by Princeton Data Source under the direction of Princeton Survey Research Associates International. The 2014 telephone interviews were conducted Oct. 27-Nov. […]

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    Methodology

    About the Pew Research Center’s Spring 2015 Global Attitudes Survey Results for the survey are based on telephone and face-to-face 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 on […]

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    Methodology

    The analysis in this report is based on telephone interviews conducted March 17-27, 2016 among a national sample of 2,254 adults, 18 years of age or older, living in all 50 U.S. states and the District of Columbia (566 respondents were interviewed on a landline telephone, and 1,688 were interviewed on a cell phone, including […]

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