Interviewer Effects on a Network-Size Filter Question

Josten Michael () and Trappmann Mark ()
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Josten Michael: Opinion Market Research & Consulting GmbH, Rollnerstr. 8, 90408 Nuremberg, Germany.
Trappmann Mark: Institute for Employment Research, Regensburger Str. 104, 90478 Nuremberg, Germany and University of Bamberg, Germany.

Journal of Official Statistics, 2016, vol. 32, issue 2, 349-373

Abstract: There is evidence that survey interviewers may be tempted to manipulate answers to filter questions in a way that minimizes the number of follow-up questions. This becomes relevant when ego-centered network data are collected. The reported network size has a huge impact on interview duration if multiple questions on each alter are triggered. We analyze interviewer effects on a network-size question in the mixed-mode survey “Panel Study ‘Labour Market and Social Security’” (PASS), where interviewers could skip up to 15 follow-up questions by generating small networks. Applying multilevel models, we find almost no interviewer effects in CATI mode, where interviewers are paid by the hour and frequently supervised. In CAPI, however, where interviewers are paid by case and no close supervision is possible, we find strong interviewer effects on network size. As the area-specific network size is known from telephone mode, where allocation to interviewers is random, interviewer and area effects can be separated. Furthermore, a difference-in-difference analysis reveals the negative effect of introducing the follow-up questions in Wave 3 on CAPI network size. Attempting to explain interviewer effects we neither find significant main effects of experience within a wave, nor significantly different slopes between interviewers.

Keywords: Partial falsification; network generator; filter questions; interviewer cheating (search for similar items in EconPapers)
Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:vrs:offsta:v:32:y:2016:i:2:p:349-373:n:8

DOI: 10.1515/jos-2016-0020

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