Background: The 2009 Epidemiological Survey of Substance Abuse (ESA) investigates intake and abuse of psychoactive substances in the German general population. Aims: To describe sampling, instruments, data collection, response rate, weighting procedure, ...
The 2015 Epidemiological Survey of Substance Abuse: Study Design and MethodologyAbstract.Aims: The paper gives an overview on methods and study design of the 2015 Epidemiological Survey of Substance Abuse (ESA). Methods: The sampling frame of the ESA ...
Background: Non-response bias is a major problem for the validity of survey answers. Analyses of reasons for non-response in surveys with nursing home residents (NHR) are scarce. Aim and Method: The aim of this study was to develop reliable and valid ...
Abstract. In large-scale educational assessments such as the Third International Mathematics and Sciences Study (TIMSS) or the Program for International Student Assessment (PISA), sizeable numbers of test administrators (TAs) are needed to conduct the ...
Nonresponse to organizational surveys is a vexing problem. Although scholars have a reasonable understanding of how systematic nonresponse influences estimates of population means, they are likely to have less context for understanding how it impacts ...