Ability to design highly-usable user interfaces
Demonstrated by: 

A Skilled user interface designer should be able to do the following:

An Expert user interface designer should additionally be able to do the following:

Roles and Tasks that require this skill

Participate in a Usability meeting (Contributor task)
Attend a Usability group meeting. Participate in or lead usability reviews.
Duration: 1 hour
Usability group member (Contributor role)
Improve the usability of Drupal core and contributed modules, themes, and distributions
Duration: ongoing

Roles and Tasks that may use this skill

Contributed module, theme, or distribution maintainer (Contributor role)
Help manage the software development, design, and issues for a contributed module, theme, or distribution
Duration: ongoing
Create a merge request for an issue (Contributor task)
Add or update a "merge request" (software fix) on an issue
Duration: 1 hour
Discover Drupal mentor (Contributor role)
Share your experience and expertise with an underrepresented student in the Discover Drupal program
Duration: ongoing
Drupal Core Leadership Team (Contributor role)
Perform final review and governance on community-suggested improvements to Drupal core
Duration: ongoing
Drupal core subsystem maintainer (Contributor role)
Oversee the development of a module, theme, or other subset of Drupal core
Duration: ongoing
Drupal core topic maintainer (Contributor role)
Review issues in a given topic in Drupal core
Duration: ongoing
Manually test a proposed fix for an issue (Contributor task)
Manually test a patch or merge request that has been proposed as the fix for an issue
Duration: 20 minutes
Project contributor (Contributor role)
Contribute your time to Drupal core or a contributed module, theme, or distribution project
Duration: ongoing
Software tester (Contributor role)
Manually test Drupal core or contributed modules, themes, or distributions
Duration: ongoing