The mobile nature of wireless phones creates a significant problem for geographic sampling and analysis. This problem is exacerbated by the fact that the wireless-only are more geographically mobile than those with landline phones.
2009 Methodology Reports
Despite such challenges as a growing wireless-only population, possible racially-related response bias and greater-than-usual difficulties in forecasting turnout, pollsters' methods were evidently adequate to the task.
How the question is phrased has a clear impact on whether the public rates deficit reduction or stimulus spending more important.
Because Muslim Americans make up a very small percentage of the U.S. public, it is difficult to provide a reliable picture of their views and differences in survey design can crucially affect findings.
Pollsters and other communications researchers are finding their job ever more challenging but also more interesting, and, with the help of new techniques and data sources, even more amenable.