Designing for the "Average User"
http://experiencedynamics.blogs.com/site_search_usability/2006/04/index.html

Spillers, Frank
Demystifying Usability
2006

Abstract:

User advocacy is one of the central goals of usability. User advocacy can be defined as the process an IT professional (with an interest in user experience) goes through in re-sensitizing herself to the world of the 'average user'.