ACM New York, NY, USA 1-2 (2020). doi:10.1145/3389189.3393750 Proceedings of the 13th ACM International Conference on PErvasive Technologies Related to Assistive Environments-ACM New York, NY, USA, 2020.-ISBN 9781450377737-doi:10.1145/3389189.3393750 Proceedings of the 13th ACM International Conference on PErvasive Technologies Related to Assistive Environments-ACM New York, NY, USA, 2020.-ISBN 9781450377737-doi:10.1145/3389189.3393750PETRA '20: The 13th PErvasive Technologies Related to Assistive Environments Conference, Corfu Greece PETRA