Man-Machine Interactions 4 4th International Conference on Man-Machine Interactions, ICMMI 2015 Kocierz Pass, Poland, October 6-9, 2015 - Gruca, Aleksandra; Brachman, Agnieszka; Kozielski, Stanisław; Czachórski, Tadeusz (Springer International Publishing : Imprint: Springer, 2016)