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Erschienen in:
2010 | OriginalPaper | Buchkapitel
Usability of Accessible Bar Charts
verfasst von : Cagatay Goncu, Kim Marriott, John Hurst
Erschienen in: Diagrammatic Representation and Inference
Verlag: Springer Berlin Heidelberg
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Bar charts are one of the most commonly used diagram types.
Tactile
diagrams are a widely used technique for presenting graphics to people who are blind. We explored how to present bar charts using a tactile presentation. Our user study used blind participants and evaluated both user preferences and performance. We found that providing grid lines and values in a tactile diagram was preferred to a direct transcription. In addition, presenting the data as a tactile table was preferred to a tactile chart. Both of these approaches reduced the error rate, and presentation as a table had performance benefits. We also investigated the comparative usability of: a tactile presentation, an
audio
description of the bar chart, and a
tactile/audio
presentation in which a tactile diagram is overlaid on a touch-sensitive device which provides audio feedback on demand. We found that tactile was the most preferred while audio was the least.