Numbers, Facts and Trends Shaping Your World

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    Patrick van Kessel

    Patrick van Kessel is a senior data scientist at Pew Research Center, specializing in computational social science research and methodology. He is the author of studies that have used natural language processing and machine learning to measure negative political discourse and news sharing behavior by members of Congress on social media, and is involved in […]

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    Appendix B: Methodology

    Pew Research Center conducted surveys among 24,599 adults (ages 18 and older) across 15 countries in Western Europe. Interviewing was carried out under the direction of GfK Belgium by telephone (both cellphones and landlines) from April to August 2017. The questionnaire administered by survey interviewers was designed by Pew Research Center staff in consultation with […]

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    Methodology

    The analysis in this report is based on telephone interviews conducted June 5-12, 2018 among a national sample of 2,002 adults, 18 years of age or older, living in all 50 U.S. states and the District of Columbia (502 respondents were interviewed on a landline telephone, and 1,500 were interviewed on a cell phone, including […]