User Experience Designer or ...? What You Call Yourself Matters
http://intentionaldesign.ca/2009/03/25/whats-the-difference-in-a-ux-name/

Bailie, Rahel Anne
Intentional Design Inc.
2009

Abstract:

Using a self-designation with a certain amount of specificity sacrifices practicality to accuracy. Individuals who have been hired as a single-function specialist may have the luxury of presenting as a “usability engineer” or “information architect”. For the independent consultant, this strategy can have definite negative consequences.