A research article the Winter 2009 issue of Public Opinion Quarterly provided some useful comparisons of data quality between phone surveys and various types of online surveys. The findings are based on an experiment that fielded identical questionnaires via three survey modes, and, not surprisingly, there are strengths and weaknesses to each type of survey.

Phone vs. Online Surveys: Strengths & Weaknesses
As reflected in the table above, the article is rather technical. But there are two key summary points worth learning from the study: (more…)