Human-Computer Interaction – INTERACT 2007 11th IFIP TC 13 International Conference, Rio de Janeiro, Brazil, September 10-14, 2007, Proceedings, Part II - Baranauskas, Cécilia; Palanque, Philippe; Abascal, Julio; Barbosa, Simone Diniz Junqueira (Springer Berlin Heidelberg : Imprint: Springer, 2007)