Beyond web content accessibility guidelines: Design of enhanced text user interfaces for blind internet users

摘要: Websites do not become usable just because their content is accessible. For people who are blind, the application of W3C's Web Content Accessibility Guidelines (WCAG) often might even make a significant difference in terms efficiency, errors or satisfaction website usage. This paper documents development nine guidelines to construct an enhanced text user interface (ETI) as alternative graphical (GUI). An experimental design with 39 blind participants executing search and navigation task on showed that ETI, users executed significantly faster, committing fewer mistakes, rating it better subjective scales well when compared GUIs from other websites they had visited. However, performance did improve ETI task, main reason presumed be labeling problems. We conclude improvement over GUI, but cannot help overcoming one major weakness most websites: If understand labels, best them navigate.