- Sophia Ppali, Mireia Yurrita, Alice Vitali, Alok Debnath, Lucie Flek, Andrea Cuadra, Sven Mayer, Michal Lahav, Tiffanie Horne, Aneesha Singh, Giulia Barbareschi, Andrea Mauri 0001, Himanshu Verma 0001, editors, Proceedings of the 4th EmpathiCH Workshop, (Re-)Thinking Empathy's Materiality in HCI co-located with ACM CHI Conference on Human Factors in Computing Systems, EMPATHICH@CHI 2026, Barcelona, Spain, April, 14, 2026. Volume 4221 of CEUR Workshop Proceedings, CEUR-WS.org, 2026.