The two volume set LNCS 4662 and LNCS 4663 constitutes the refereed proceedings of the 11th IFIP TC13 International Conference on Human-Computer Interaction, INTERACT 2007, held in Rio de Janeiro, Brazil, in September 2007.

The 50 revised papers of the second volume presented together with 14 doctoral consortium papers, 8 tutorials, 11 posters, video papers and panel surveys, were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on tangible user interfaces and interaction, cultural issues in HCI, safety, security, privacy and usability, user and usability studies, focus and context visualization techniques, and tagging, visualizing social information, online communities and e-learning, children, games, and the elderly, usability studies on collaborative systems, interaction for selection, as well as software engineering and HCI.