Re: AGENDA: W3C WAI User Agent Telecon 6 October 1999

At 10:21 AM 10/4/99 -0700, Jon Gunderson wrote:
>Discussion 
>
>   1.Issue #96: Issues related to Checkpoint 2.1: Mapping of user agent
>functions to control mechanisms and memory demands related to
>     sequential/direct access to functionalities
>     http://cmos-eng.rehab.uiuc.edu/ua-issues/issues-linear.html#96 
>

In addition to cognititve demands that turn into failure modes, there are
motor demands that may also be a failure mode if there are not enough
shortcuts.

Guideline: The keystroke-only command protocol of the UA UI should be
efficient enough to support production use.

Guideline: The user has to understand the choices availble to them at any
time.

Technique: Provide overlapping coverage of frequently used actions by
dialogs which cover a range in aspect ratio, i.e. how short-wide or
tall-narrow they are. 

Technique: Make the most used commands things that are easy to do.

Technique: Make the safety net that reaches all end states depend only on
things that are easy to do. 

Definition: Shortcuts represent short-wide dialogs.  Phone menus represent
tall-narrow dialogs.

Dependency: some motor-impaired users depend on shortcuts to a P2 level of
severity.

Dependency: short-wide choice trees can get too slow (P2) for eyes-free users.

Dependency: tall-narrow choice trees tax people's vocabulary/memory (P3).

Received on Wednesday, 6 October 1999 13:57:20 UTC