How Do Users Really Feel About Your Design?
http://www.uxmatters.com/MT/archives/000223.php

Sherman, Paul J.
UXmatters
2007

Abstract:

The user experience field has been trying to move beyond mere usability and utility for years. So far, no one seems to have developed easy-to-implement, non-retrospective, valid, and reliable measures for gauging users' emotional reactions to a system, application, or Web site. In this column, I'll introduce you to a promising method that just might solve this problem.