Ipsos conducted the National Public Opinion Reference Survey (NPORS) for Pew Research Center using address-based sampling and a multimode protocol. The survey was fielded from May 19 to Sept. 5, 2023.

A summary of ABC News' polling standards and survey methodology follows. ABC News maintains standards for disclosure, validity, reliability and unbiased content in survey research and evaluates ...

Eberts serves on the board of directors of the nonprofit 1Day Sooner. Fisher is a professor of social medicine at the University of North Carolina Center for Bioethics. For decades, the consensus ...

Per federal regulations, University and affiliate researchers must notify the IRB of unanticipated problems that involve risks to participants or others (henceforth referenced as Unanticipated ...