Exler, Anja; Marcel Braith, Kristina Mincheva, Andrea Schankin, and
Michael Beigl

Whether a person is in company is an important indicator for several research fields such as monitoring a patient’s mental health states in clinical psychology or interruptibility detection in experience sampling. Traditionally, social activity is assessed using self-report questionnaires. However, this approach is obtrusive. The best solution would be an automatic assessment. Smartphones are suitable sensing systems for this task. In this paper, we investigate relations between being in company and place types.