Introduction
This report describes the affect of using different survey modes on the measurement of substance use prevalence figures. Three different modes were included in the design of this study: a telephone, a postal, and a face to face survey-mode. The study has been conducted in three European countries: Greece, Sweden and the Netherlands. These countries were selected because they recently conducted a national study on drug use, which laid the foundation for the face-to-face section of this study.
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Table of contents
- Introduction
- Mode-effects in the wider framework of methodological studies
- A mode-effect study in three countries: sampling, fieldwork and response efficiency
- Towards the analysis: data preparation, data quality, data weigthing
- The analysis
- International comparisons of methodological studies
