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 !
Billon, Magali, Semjen, A. and Stelmach, G. E. (1996): The Timing Effects of Accent Production in Periodic Finger-Tapping Sequences. In Journal of Motor Behavior, 28 pp. 198-210.
Fitts's Law: [/encyclopedia/fitts_law.html]