In Spring 2015, a team of students from my Usability Theory & Practice course (LIS 644) at Pratt Institute conducted a usability study of the website for the U.S. Government Documents department at Columbia University Libraries (http://library.columbia.edu/locations/usgd.html).
Student Team: Corina Bardoff, Mike Benowitz, Scarlett Taylor, Janelle Varin
Download Full Report: Columbia University Libraries Government Documents User Testing Report Spring 2015 (PDF)