Work in Survey Methodology
Krosnick and colleagues compared Internet surveys, telephone surveys, and face-to-face (FTF) surveys of probability samples and found that people provide socially desirable answers more often in telephone surveys than in the other two cases. They found that face-to-face-survey respondents respond more accurately than telephone respondents. Since face-to-face interviews are costly, Krosnick conducted a study providing computers and an Internet connection to a set of randomly sampled people, and inviting them to answer survey questions online over a year. This method is known to produce samples, after subtracting those who refused to participate, reflecting population counts of various groups proportionately.
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