Causes of mode effects: separating out interviewer and stimulus effects in comparisons of face-to-face and telephone surveys

Publication type

ISER Working Paper Series

Series Number

2012-27

Series

ISER Working Paper Series

Authors

Publication date

November 23, 2012

Abstract:

We attempt to isolate the causes of mode effects on measurement in a comparison of face-to-face and telephone interviewing, distinguishing between effects caused by differences in the type of question stimulus used in each mode (audio vs. visual) and effects caused by other differences between the modes, notably, the presence or absence of the interviewer. We use data from an experiment conducted in the context of the European Social Survey. Differences in the stimulus did not lead to differential measurement error, but the presence or absence of the interviewer did. Telephone respondents were far more likely to give socially desirable responses than face-to-face respondents.

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