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 !
Berthier, Neil E., Clifton, Rachel K., Gullapalli, Vijaykumar, McCall, Daniel D. and Robin, Daniel J. (1996): Visual Information and Object Size in the Control of Reaching. In Journal of Motor Behavior, 28 pp. 187-197.
Fitts's Law: [/encyclopedia/fitts_law.html]