Survey data are used in many disciplines including Social Sciences, Economics and Psychology. Interviewers behaviour might affect the quality of such data. This book presents the results of new research on interviewers motivation and behaviour. A substantial number of contributions address deviant behaviour, methods for assessing the impact of such behaviour on data quality and tools for detecting faked interviews. Further chapters discuss methods for preventing undesirable interviewer effects. Apart from specific methodological contributions, the chapters of the book also provide a unique...