Numbers, Facts and Trends Shaping Your World

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  • fact sheet

    Party Identification Trends, 1992-2014

    Pew Research Center has been tracking the party affiliation of the general public for over 20 years. Explore the party ID data for two dozen demographic subgroups, categorized by gender, race, education, generation, and religious affiliation.

  • report

    Appendix A: Methodology

    The Implicit Association Test (IAT) was developed in 1995 by Anthony G. Greenwald of the University of Washington and Mahzarin R. Banaji, now at Harvard University. The test is designed to measure unconscious or implicit preferences of individuals. In the case of race, the goal of the IAT is to measure preference for one race […]

  • report

    Methods

    The analysis in this report is based on telephone interviews conducted March 17, 2015 through April 12, 2015 among a national sample of 1,907 adults, 18 years of age or older, living in all 50 U.S. states and the District of Columbia. 672 respondents were interviewed on a landline telephone, and 1,235 were interviewed on […]

  • report

    Methods

    Study Design & Documentation Introduction The Pew Research Center’s Teen Relationship Study was funded, designed and analyzed by Center staff. Quantitative fieldwork was conducted by the GfK Group (GfK, formerly Knowledge Networks.) Specifically, the survey examined the attitudes of teens age 13 to 17 years old, as well as those of their parents, toward technology. […]

  • report

    About the Survey

    The analysis in this report is based on telephone interviews conducted July 14-20, 2015 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 (700 respondents were interviewed on a landline telephone, and 1,302 were interviewed on a cell phone, including […]

  • report

    About the Report

    Updated August 13, 2015: This new edition includes corrected estimates for Iceland, Luxembourg, the Netherlands and Taiwan, and some related aggregated data. This report examines changes in the distribution of the global population by income from 2001 to 2011. Of special interest is the change in the global middle-income population, or the global middle class. […]

  • report

    Why Elaborate on Scientists’ Views?

    This report revisits the subject matter of a January release in which Pew Research Center compared the public’s and scientists’ viewpoints on key scientific issues. Specifically, this report takes a closer look at how opinions vary among different groups of scientists. There are several reasons to explore scientists’ views further. The first is to get […]

  • report

    Why Elaborate on Scientists’ Views?

    This report revisits the subject matter of a January release in which Pew Research Center compared the public’s and scientists’ viewpoints on key scientific issues. Specifically, this report takes a closer look at how opinions vary among different groups of scientists. There are several reasons to explore scientists’ views further. The first is to get […]