Further Reading
Psychology
J.M. Wolfe. Visual search. In H. Pashler, editor, Attention. University College London Press, London, 1996.  http://search.bwh.harvard.edu/
Kanwisher and Wojciulik. Visual attention: Insights from brain imaging.  Nature Neuroscience Reviews Nov 2000.
HCI
Foltz and Lee.  InfoMapper:  Coping with the Curse of Dimensionality in Information Visualization.  Submitted to UIST 2002.
Horvitz, Jacobs, and Hovel.  Attention-sensitive alerting.  UAI ’99.  http://www.research.microsoft.com/~horvitz/
Nowell, Hetzler, and Tanasse.  Change blindness in information visualization.  Proc. IEEE Symposium on InfoVis 2001.
Renaud.  Expediting rapid recovery from interruptions by providing a visualization of task activity. Proc OZCHI 2000.