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

Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...

Detailed information on Pew Research Center international survey methodology, such as mode of interview, sampling design, margin of error, ... (CAPI), but historically pen-and-paper interviewing (PAPI ...

Will Fitzhugh is the founder of The Concord Review, since 1987 the only journal in the world for the academic research papers of secondary students. Updated March 7, 2014, 6:23 PM The Internet can ...