Marc Hassenzahl explains the fascinating concept of User Experience and Experience Design. Commentaries by Don Norman, Eric Reiss, Mark Blythe, and Whitney Hess
User Experience and Experience Design !
Olsen Jr, Dan R. and Halversen, Bradley W. (1988): Interface Usage Measurements in a User Interface Management System. In: Green, Mark (ed.) Proceedings of the 1st annual ACM SIGGRAPH symposium on User Interface Software October 17 - 19, 1988, Alberta, Canada. pp. 102-108.