7. April 2003

[ Usability ]

1D vs. 2D - Jakob Nielsen über Interfacedesign für Blinde

Jakob Nielsen schreibt in seiner aktuellen Alertbox "Alternative Interfaces for Accessibility" über unterschiedlichen Websitedesigns für unterschiedliche Zielgruppen.

The typical advice for making websites accessible is to create a single design for all users, then ensure that it complies with additional guidelines for use by people with disabilities. [...] The main reason for this single-design-for-multiple-audiences approach is the assumption that most companies are unable to keep two different designs up-to-date.

Er weist darauf hin, dass der wesentliche Unterschied zwischen Designs für eingeschränkt sehfähige und blinde User der Unterschied zwischen "2D" und "1D" ist: Sehbehinderte Nutzer brauchen Layouts, die den Grundsätzen der Accessibilty entsprechen - vollkommen blinde User brauchen Websites, die auf akustische Ausgabe optimiert sind. Diese können nur "linear", also "eindimensional" wiedergegeben werden.

Er geht auf einige Einzelheiten ein

In a 2-D layout, a good graphic designer organizes blocks of information to provide a visual of the website's structure and to prioritize the most important tasks by their relative size and 2-D location. For example, designers typically place the most important Web page elements in the center of the top screenfull, since that's where sighted users tend to look first. Although a targeted 1-D audio presentation should start with the most important information, most audio translations simply read a 2-D page aloud, starting at the top left, which mainly contains information that sighted users typically skip. Also, simply reading aloud eliminates size distinctions, which are key elements in 2-D designs.

und hat ein paar interessante Ideen zu dreidimensionalen Interfaces.

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