Anita Kollerbaur, Assistant Professor and the head of the CLEA research group, has inspired my work during several years and contributed with many ideas and helpful comments. She has also been the supervisor of this thesis.
Hans Köhler and Yvonne Westrin got me started with my research on human-computer interaction. Rune Petterson has inspired me with his work on visuals for information. I also which to thank Rolf Ferm and Lars-Olof Jieveskog for their help and encouragement in my previous research. Carl-Gustaf Jansson, Acting Professor at DSV, has been very helpful in my research and helped with the final preparation of this thesis.
I warmly thank Thomas Larnhed, now at CAP Gemini, who inspired me to write about orientation and hypermedia. Without his support and helpful comments this thesis would never have been written.
Special thanks to Kjell Krona at the Department of Architecture, Royal Institute of Technology, who has given his critical support and contributed to this thesis with creative ideas and comments. I am also most grateful to Nils-Erik Gustafsson at Ellemtel Utvecklings AB, who has helped me with several aspects of this work.
I want to express my gratitude to Kerstin Severinsson Eklundh at the Department of Numerical Analysis and Computing Science, Royal Institute of Technology (NADA), who has provided her support. I also want to thank Yngve Sundblad at NADA, for inspiring discussions on human-computer interaction and hypermedia.
I thank Yvonne Waern and Kristian Wikström (Department Psychology, University of Stockholm) for providing valuable suggestions, and for their help with evaluating ideas central to this work.
Many thanks to Jan Wahlman, a freelance graphical designer and film maker, with whom I have had the privilege to discuss different aspects of hypermedia and communication.
There are many other persons I feel grateful to. In particular I wish to thank my colleagues and friends at DSV and my fellow researchers at NADA.
This work has been funded in part by the Swedish National Board for Technical Development (STU), and in part by the Swedish National Board for Education (SÖ). It has been performed in CLEA (Computerbased LEArning environments) at the Department of Computer Science at the University of Stockholm and the Royal Institute of Technology.