Delphi-Based Expert Evaluation of the XR2Learn Hybrid Instructional Design Framework for XR Education. - Christoforos Karachristos; Theodora Kouvara; Vasilis Zafeiropoulos; Theofanis Orphanoudakis; Giorgos Anastasakis; Alessandra Antonaci; Ioannis Chatzigiannakis; Maria Paola Conte; Angelica Marsico; Sindi Devole; Silvia Giordano; Matteo Besenzoni (Comput., 2026)