A representational analysis of relational information displays
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Although research on non-visual access to visually represented information is steadily growing, very little work has investigated how such forms of representation could be constructed through non-visual means. We discuss in this paper our approach for providing audio access to relational diagrams using multiple perspective hierarchies, and describe the design of two interaction strategies for constructing and manipulating such diagrams through this approach. A comparative study that we conducted with sighted users showed that a non-guided strategy allowed for significantly faster interaction times, and that both strategies supported similar levels of diagram comprehension. Overall, the reported study revealed that using multiple perspective hierarchies to structure the information encoded in a relational diagram enabled users construct and manipulate such information through an audio-only interface, and that combining aspects from the guided and the non-guided strategies could support greater usability.