Campaign Puts Polling Methods Under Microscope
By Alan Elsner
WASHINGTON (Reuters) - - One poll last week had President Bush leading Democrat John Kerry by 13 percentage points while another showed the candidates tied in the U.S election race. What is going on with public opinion polls?
As U.S. voters are swamped by a blizzard of rival surveys in the final weeks of the Nov. 2 presidential election campaign, pollsters themselves are facing increasing questions about their methodology and accuracy.
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Pollsters acknowledge that there are many ways errors can slip into their surveys including sampling errors, interview bias and poor questions. Even the order in which questions are asked and slight variations in wording can produce vastly different results.
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