Human-Computer Interaction – INTERACT 2009 12th IFIP TC 13 International Conference, Uppsala, Sweden, August 24-28, 2009, Proceedings, Part II - Gross, Tom; Gulliksen, Jan; Kotzé, Paula; Oestreicher, Lars; Palanque, Philippe; Prates, Raquel Oliveira; Winckler, Marco (Springer Berlin Heidelberg, 2009)