Immersibility: What the World Needs Now?
http://www.usabilityprofessionals.org/upa_publications/upa_voice/volumes/2/issue_3/immerse2.htm

Zukor, Lee
Usability Professionals Association
2001

Abstract:

'Immersibility' is a concept that takes a holistic approach to the quality of the Web user experience. The concept is discussed on www.immersibility.com. The site results from work by agency.com, the Nielsen Norman Group and Gomoll Research & Design. The site also offers a tool called 'the immersibility index' intended to measure, in a holistic manner, the quality of the Web user experience.