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    Methodology

    The analysis in this report is based on telephone interviews conducted June 15-26, 2016 among a national sample of 2,245 adults, 18 years of age or older, living in all 50 U.S. states and the District of Columbia (559 respondents were interviewed on a landline telephone, and 1,686 were interviewed on a cell phone, including […]

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    Obama Leaves Office on High Note, But Public Has Mixed Views of Accomplishments

    Survey Report With just a few weeks left in Barack Obama’s presidency, Americans’ early judgments of his place in history are more positive than negative. Obama is poised to leave office on a high note: Current assessments of both the president and the first lady are among the most favorable since they arrived in the […]

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    Methodology

    About the Pew Research Center’s Spring 2015 Global Attitudes Survey Results for the survey are based on 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 our website. […]

  • report

    Methodology

    Survey methodology Most of the analysis 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

    Survey conducted April 12-19, 2016 Most of 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 […]

  • report

    Methodology

    This report is based on data from numerous Pew Research Center surveys. Methodology summaries from the four main data sources are provided below. Methodology of the 2015 Survey on Government The analysis in this report is in part based on telephone interviews conducted Aug. 27-Oct. 4, 2015, among a national sample of 6,004 adults, 18 […]

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    Methodology

    Survey methodology Most of the analysis in this report is based on telephone interviews conducted May 25 to June 29, 2016, among a national sample of 5,006 adults, 18 years of age or older, living in all 50 U.S. states and the District of Columbia (1,253 respondents were interviewed on a landline telephone, and 3,753 […]

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    Human Enhancement

    The scientific and ethical dimensions of striving for perfection

  • report

    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 […]

  • report

    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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