02086748

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02086748 Bennett, David J. Effects of navigation and position on task when presenting diagrams. Hegarty, Mary (ed.) et al., Diagrammatic representation and inference. 2nd international conference, Diagrams 2002, Callaway Gardens, GA, USA, April 18--20, 2002. Proceedings. Berlin: Springer (ISBN 3-540-43561-1). Lect. Notes Comput. Sci. 2317, 161-175 (2002). 2002 Berlin: Springer EN

http://link.springer.de/link/service/series/0558/bibs/2317/23170161.htm

Summary: This paper questions how we could and should present diagrams to blind people using computer-generated sound. Using systems that present information about one part of the diagram at a time, rather than the whole, leads to two problems. The first problem is how to present information so that users can integrate the information into a coherent overall picture. The second is how to select the area to be presented. This is looked at by using a system that presents graphs representing central heating system schematics. The system presents information by user choice through either a hierarchical split of information and navigation system, or a connection oriented split of information and navigation system. Further, we have a split as to whether a simple system of presenting location of nodes is used, or not. Tasks, classified as being based on hierarchical information or connection-based information, were set using the system and the effect of the different models was recorded. It was found that there was a match of task to navigation system, but that presentation of position had no discernable effect.