An effective therapy requires a correct diagnosis. For this you need diagnostic tests which are evaluated in so-called diagnostic studies. The development of statistical methods for planning and analyzing diagnostic studies and diagnostic meta-analysis was neglected a long time. Therefore, we aim to close the still existing methodological gaps. The team in this research area consists of Dr. Mahnaz Badpa, Alexander Fierenz, Dr. Amra Pepic, Katharina Stahlmann, Dr. Frederike Vogel, Philipp Weber, and Prof. Dr. Antonia Zapf. We are currently working on the following topics (mostly DFG-funded):