In Spring 2016, a team of students from my Usability Theory & Practice course (LIS 644) at Pratt Institute conducted a usability study of the NYC Open Data portal (https://nycopendata.socrata.com/).
Student Team: John Chagaris, Charles Dellebovi, Nishant Goyani, Molly Reese-Lerner
Download Full Report: NYC Open Data User Test Report 2016-05-14 (PDF)