A system for performing remote usability testing of a website includes a module for generating particular tasks, a module for moderating a session with a number of participants, and a module for receiving usability data. The system further includes a analytics module for analyzing the received usability data. The module for generating the particular tasks includes a research server configured to interface with user experience researchers and storing multiple testing modules for selecting qualified participants from the number of participants and for generating the particular tasks having research metrics associated with a target web site. In an embodiment, the research server randomly assigns one or more of the multiple testing modules to one of the participants. The multiple testing modules may include card sorting studies for optimizing a web site's architecture or layout.