The general aim of the Internal Traineeship II is for students to write up a research design on a topic that i agreed with the supervisor. The topic needs to be related to the core focus of the research master on Individual Differences and Assessement. The research design should not be research that needs to be realized and executed, the goal of the traineeship is to develop the skills of designing an empirical or methodological study, which could potentially be executed. By “empirical or methodological” it is intended that the study can address a substantive topic on a purely methodological research question simulation studies. It is explicitly emphasized that the proposed project may represent a replication study. The aim of the traineeship is to write up a research design plan rather than executing one.