Utjecaj odbijanja ankete na valjanost telefonskih predizbornih istraživanja: slučaj parlamentarnih izbora 2003. godine
The Influence ofRefusals on the Validity of the Pre-Election Telephone Survey: The Case of the 2003 Parliamentary Elections

Summary/Abstract: The analysis of nonresponse in three pre-election telephone researches that were carried out during 2003 is presented in this study. Apart from the data about frequency of refusals and the analysis of refusals according to region and settlement size, the analysis of demographic characteristics of participants who are more likely to reject participation in research is presented. Comparison of demographic characteristics and party preferences among those participants who, in the first contact immediately agreed to participate in the research and those participants who, in the first contact rejected participating but in the second contact agreed to participate shows the influence of refusals on the predictive validity of pre-election telephone surveys. It has been established that those participants who first rejected participation in the research but then reconsidered their decision to participate are more likely to support the then opposition parties than those participants who in the first contact agreed to participate in the research.

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