His research activity has mainly been carried out in the Human-Computer Interaction (HCI) field, with the goal to introduce computational support by designing relevant languages, models, tools, and applications to improve usability, accessibility, and user experience for all in the various possible contexts of use. For this purpose, he has continuously led for several years numerous interdisciplinary and international projects. In his research work he has always aimed at deepening and intertwining both theoretical and practical innovative aspects, with attention to possible social implications. His main current research interests are in the areas of Interactive Smart Spaces, Accessibility, End-User Development, Human-centered Artificial Intelligence