In the old days (decades ago), phone surveys had limited utility because many people had no phone service in their homes. When that changed, phone surveys became ubiquitous because they allowed researchers better control over the process. Data quality improved. Now increasing numbers of people have moved to cell phones only, which has been a significant challenge for the survey industry. The numbers are staggering:
The number of people without home access to landline telephones is increasing.
Almost half of adults under age 30 live in a household with only wireless telephone service.
Another article was just published in the Spring 2010 issue of Public Opinion Quarterly exploring data quality differences between online surveys and phone surveys. The findings were based on a lab experiment in which subjects completed survey questions either on a computer or over an intercom system with an interviewer. Doing the study in a laboratory isolated the mode effect of computerized self-administered data collection vs. an interview conducted by a human. (more…)
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…)