Understanding the effects of real-time sentiment analysis and morale visualisation in backchannel systems: A case study

•Design and evaluation of a backchannel system for connecting presenters with audience in realtime. After reviewing existing systems, the best components were included and new components added to improve overall performance and usability.•Using a seven part principles-based evaluation system, analysis of the effectives of the tool possible as well as user attitude towards use of the tool. This was also analysed and confirms the tools effectiveness.•A Markov chain was computed to confirm initial findings as well as predict possible future uptake of the tool.•Some recommendations about future research directions and applicability of this tool in a wider context – other than education alone – is discussed.