I’m still sifting through the aftermath of the Presidential election and the controversial accusations of bias in polling and predictions leveled against various pollsters on all sides of the political spectrum. For data geeks, the question of bias in polling is a source of endless fascination. As someone whose profession involves mostly non-political surveys, however, I zeroed in on a basic methodological question: Regardless of polling firm, what polling method showed the least bias in predicting the election? According to a detailed post by Nate Silver, the answer is clear, and should make anyone who relies on survey or polling data sit up and take notice: All things being equal, online surveys showed 40 percent less bias than live telephone interviewers, and an astonishing 72 percent less bias than automated telephone “robopolls.” […]