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The survey interviewer, as gatekeeper to the attitudes, experiences, and perceptions of respondents, occupies a prominent position in survey research and has been a subject of concern since the emergence of systematic survey research. Recognition of the interviewer's potential for manipulating or distorting responses has generated numerous approaches aimed at controlling the interviewer's influence on responses. Over the years, rules for interviewer behavior have evolved
Cannell et al. (Thu,) studied this question.