Fig. 1. The VASABI interface realises our multifaceted, visual user behaviour analysis approach through hierarchical profiles. We concurrently visualise and interrelate: clusters of users based on tasks extracted with a topic-modelling based approach (top-left), user profiles with multiple features (top-right) and distribution of sessions over time (middle). Selected sessions (brown brush over temporal histogram) are also highlighted both within the user profiles as orange dots and analysed further in the session timeline (bottom).