Mobile IxD

The form factor and personal nature of a mobile device almost ensures multi-tasking. While some mobile activities are typically performed during leisure time when attention may be more focused, it remains prudent to account for divided attention.

It is easy to imagine different scenarios that may cause divided attention and user research should reveal or affirm them. Mobile devices are often used while commuting via mass-transit in much of the world. Consider the potential distractions to the user. Additionally, the impact of laws enforcing hands-free usage of mobile devices while operating a motor vehicle must be taken into account when designing a mobile product.

Also note that the level of attention given to a task may vary even as the task is in progress.

Provide key information first
Layout and visual design of individual user interface elements should inform the user about the current state, not just be aesthetically pleasing
Use techniques to “chunk” the information on the screen, such as white space, dividing lines or other visual elements to separate key components (e.g., navigation vs. content), and paragraphs for blocks of text
Consider using high-contrast visual design elements
Reduce and simplify user interface text so that it may be recognized and read more quickly
Enable hands-free operation when possible through voice and be sensitive to when the device is in hands-free mode
Use accelerator functions for advanced users to help enable a “burst” pattern of usage

dave@mobileixd.com