I’m playing catch up here, trying to find the articles I read before this was a subject worth jotting a few notes down about.
“Angus Reid Strategies, one of the largest Canadian-owned polling companies (and newly subsumed under Vision Critical), now conducts the bulk of its research online, culling respondents for specific polls from an Internet forum of tens of thousands of willing Canadians. But Frank Graves, head of competitor EKOS Research Associates, suggests that this method results in some self-selection bias.”
Terms that came up in looking this over.
Interesting that a democrat polling group was ranked highest in an election where a democrat won. As much as they’ll swear up and down they are unbiased, I suggest they know they are influential, and the very nature of their polling leads to biased results.
“Fordham University has published a ranking of the most accurate pollsters of the 2012 in terms of national trends, and (both) top spots were held by Democratic-leaning Public Policy Polling, the North Carolina-based firm.”