Debbie Collins is Head of Questionnaire Development and Testing at NatCen Social Research. An experienced survey researcher, Debbie has specialised over the past decade in survey methodology, questionnaire development and testing. Debbie founded NatCen’s Questionnaire Development and Testing Hub, with Michelle Gray in 2006 and has developed and tested survey questions and data collection tools for a wide range of clients. Debbie’s research interests include novel uses of cognitive interviewing, effective combinations of pretesting methods, and the design of web and mixed mode questionnaires.