Interactions are central to our endeavours. Whether in a face-to-face session with a doctor or via one of the social networking applications, the way interactions unfold has an impact on the final outcome of the session. This seminar addresses the problem of the development of a visual language and analysis system, enabling visual reasoning about the quality of interactions. It presents a way for encoding the way interactions unfold, a method for developing visual languages and a visual analysis system, with potential for plugging AI reasoning techniques. At this stage all this is geared towards patient-practitioner interactions in healthcare, where patients usually have limited medical background.