The questionnaire is one of the most important tools in social science research. But how do you develop a questionnaire that actually captures what you want to investigate? How do you operationalize specific areas of characteristics? How do you turn them into easily answerable question-answer units? And how do you choose a suitable existing questionnaire from the multitude available if you do not want to develop one yourself? This compact work provides answers to such and many other questions regarding the construction of questionnaires. This textbook systematically conveys the fundamentals of professional questionnaire development in its second, updated, and revised edition. Numerous examples and checklists illustrate and facilitate the implementation of the principles and methods presented.