The aim of the present report is to collect information from a literature review on computer-assisted interviewing and online data collection in general population surveys. It evaluates the pros and cons of both approaches in terms of research processes and outcomes. It provides also an overview of representative studies on drug use conducted in the EMCDDA countries that used one of these methods.

Table of contents:
• Introduction
• A glimpse of history: an alternative theoretical framework
• Methods
• Literature review
• Overview of the studies
• Survey of the EMCDDA national experts on GPS
• Conclusion
• References
• Annex 1. Examples of online data collection tools
• Annex 2. Checklist for reporting the results of Internet e-surveys
• Annex 3. Questionnaire for the national experts
• Annex 4. Online data collection summary (information from experts who reported their experience with online data collection in general population or school surveys)