This year’s two-day symposium on Advances in Scale Development will focus on how to deal with comparability issues. The topics range from assessing conceptual issues (i.e. functional and structural equivalence) to ensuring validity throughout the whole process of scale development. Key experts bridging different disciplines (e.g., social sciences, psychology, sociology) will give talks and present cutting-edge advances, exchange ideas about standards of the field and agree on shared views about best practices. In the course of the expert meeting there will be room for round-table discussions of the different positions with the aim to arrive at a blueprint for future best practices.