Mark Blumenthal, editor of pollster.com, prepared a guide in 2005 for consumers of polling data on the validity of leaked polls. His three questions to ask:
1) Has the pollster gone "on the record" about the results?
2) Does the pollster disclose their basic methodology?
3) Does the pollster go beyond bare minimum disclosure standards?
His argument: “If reporters or readers are in doubt about whether a poll is genuine, they can tell a lot from the pollster's willingness and ability to disclose this level of detail.” Continue reading...