This link contains a number of usability papers and presentations given by staff at the University of Arizona Library. Scroll down the page to the "Presentations by Access 2000" heading.
Usability testing to find out how MIT users interact with their information environment as a whole, not just how people search each individual component of that environment (from 2002)
These pages are collections of resources on specific topics of interest to usability practitioners, including books, websites, articles, tools, and organizations. The Usability and User Experience Community is a community of practice within STC, the Society for Technical Communication.
UIE (User Interface Engineering) sponsers training in field techniques, persona development, and usability testing. Articles by Jared M. Spool, such as "Seven Common Usability Testing Mistakes" and "Preventing Usability Problems from the Get-go"are included here.