Background: Teachers play an important role in seminars as facilitators and content experts. However, contextual factors like students' preparation, group size, group interaction, and content appear to influence their performance. Understanding the impact of these contextual factors on students' perception of teaching performance may help to further understand seminar teaching. Besides that, it may help curriculum organisers and teachers to get more insight in how to optimise their versatile role in seminars. The aim of this study is to investigate how students' perception of teaching performance in seminars is explained by students' extent of preparation, seminar group size, group interaction, and content.Methods: The Utrecht Seminar Evalu...