Computer-Human Interaction Research and Applications: 4th International Conference, CHIRA 2020, Virtual Event, November 5–6, 2020, Revised Selected Papers

Computer-Human Interaction Research and Applications: Second International Conference, CHIRA 2018, Seville, Spain, September 19-21, 2018 and Third International Conference, CHIRA 2019, Vienna, Austria, September 20-21, 2019, Revised Selected Papers