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Intervieweffekte bei der Erhebung des Körpergewichts in Bevölkerungsumfragen


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  • Kroh, Martin
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    Daten zum Körpergewicht der Bevölkerung werden aus Kostengründen oftmals nicht objektiv gemessen, sondern durch subjektive Angaben erhoben. Frühere Untersuchungen zur Erhebung des Körpergewichts zeigen, dass sich subjektive Gewichtsangaben von objektiv gemessenen Daten unterscheiden, was auf den fehlenden Bekennermut der Befragten zurückgeführt wird. Verschiedene Methodenstudien deuten darauf hin, dass Interviewer und die Interviewsituation einen Einfluss auf das Antwortverhalten der Befragten bei sensitiven Informationen haben. In diesem Beitrag wird untersucht, ob die Anonymität des Interviews, Merkmale der Interviewer und die Erfahrung der Befragten mit der Umfrage Einfluss auf Antworten bzgl. des Körpergewichts haben. Die Ergebnisse zeigen, dass Verweigerungen der Gewichtsangaben äußerst selten sind und dass die angegebene Höhe des Körpergewichts kaum durch Merkmale der Interviewer beeinflusst wird. Allerdings kann die Hypothese bestätigt werden, dass Personen in Befragungen, in denen ein Interviewer anwesend ist, ein niedrigeres Gewicht angeben als in anonymen Interviews. Dieser Effekt zeigt sich jedoch lediglich für Männer, die bei Anwesenheit eines Interviewers im Durchschnitt ihr Gewicht um etwa 1 kg niedriger ansetzen als bei Abwesenheit eines Interviewers. Weiterhin deutet ein positiver Zusammenhang zwischen der Anzahl an Befragungen einer Person durch das Sozio-oekonomische Panel (SOEP) und der angegebenen Höhe des Körpergewichts auf einen vertrauensbildenden Effekt von Panelbefragungen hin. -- While surveying actually measured body weight is largely impractical in national surreys, self-reported weight is a simple and inexpensive method of collecting data. Previous research shows that data on reported body weight are falsified by systematic misreporting. This bias is said to be the consequence of the sensitive nature of information on body weight. Numerous studies on survey response suggest that certain modes of data collection are more conducive than others for probing sensitive information. This paper investigates the effect of the anonymous interviews, characteristics of the interviewer and respondents' familiarisation with the survey, as factors that may impinge on reported body weight. Findings of this paper show that refusals to state the body weight are rare. Moreover, characteristics of interviewers account for only a small fraction of the variance in reported body weight. Yet the hypothesis that the absence of an interviewer in selfadministrated interviews increases reported body weight can be confirmed. This interview effect, however, occurred in men only. On average, male respondents in anonymous interview settings report on a body weight which is 1 kg more than they would report in other settings. The repeated participation of respondents in the Socio-Economic Panel Study (SOEP) increases their reported body weight accuracy which suggests a positive panel effect on respondents' willingness to disclose sensitive information.

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    Article provided by ZBW - German National Library of Economics in its journal EconStor Open Access Articles.

    Volume (Year): (2005)
    Issue (Month): ()
    Pages: 646-655

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    Handle: RePEc:zbw:espost:74461

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    Keywords: Subjektive Gewichtsangaben; Intervieweffekte; Interviewereffekte; Erhebungsmethoden; Mehrebenenmodelle; Reported body weight; interview effects; interviewer effects; survey response; multilevel examples;

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    Cited by:
    1. Monika Sander, 2008. "Changes in Immigrants' Body Mass Index with Their Duration of Residence in Germany," SOEPpapers on Multidisciplinary Panel Data Research 122, DIW Berlin, The German Socio-Economic Panel (SOEP).
    2. Heineck, Guido, 2006. "Height and weight in Germany, evidence from the German Socio-Economic Panel, 2002," Economics & Human Biology, Elsevier, Elsevier, vol. 4(3), pages 359-382, December.
    3. Rainer Schnell, 2009. "Biologische Variablen in sozialwissenschaftlichen Surveys," Working Paper Series of the German Council for Social and Economic Data, German Council for Social and Economic Data (RatSWD) 107, German Council for Social and Economic Data (RatSWD).


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